https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532en-USTelligent Community 12https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532Fri, 07 Jan 2022 08:24:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7aa253c4-1c47-41ee-820f-b933f5dd250aMatthttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532#commentsCurrent Revision posted to Documents by Matt on 1/7/2022 8:24:00 AM<br /> <p><a href="https://www.youtube.com/watch?v=vKhUGuODqOM">www.youtube.com/watch</a>&nbsp;</p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:740px;padding:8px;">Inside of the Apple IIgs computer is a chip called the MEGA-II. Many sources call this an &ldquo;Apple IIe on a chip.&rdquo; Turns out, that might be a bit of a stretch. For this build, James shows how he removed the chip from a 1990-vintage Apple IIgs and put it into a custom-designed prototype. Spoiler: It takes more than 1 chip to make a bootable Apple IIe clone, using a combination of original vintage and modern parts.</p> <h3 id="mcetoc_1foiv83rt0">Supplemental Content:</h3> <ul> <li><a href="/challenges-projects/element14-presents/project-videos/w/documents/4141/episode-517-emulate-an-eprom---how-hard-could-it-be" data-e14adj="t">Episode 517: Emulate an EPROM - How Hard Could it Be?</a></li> <li><a href="/challenges-projects/element14-presents/workbenchwednesdays/w/documents/4650/workbench-wednesday-18-digilent-analog-discovery-review" data-e14adj="t">Workbench Wednesday 18: Digilent Analog Discovery Review</a></li> <li>Bit Preserve (Vintage Computer Schematics in KiCad):&nbsp;<a href="https://github.com/baldengineer/bit-preserve" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://github.com/baldengineer/bit-preserve</a></li> <li><a href="https://oshpark.com/" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">OSH Park (PCB Fab)</a></li> <li>Golden Delicious Design Files:&nbsp;&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://github.com/baldengineer/Golden-Delicious</a></li> <li>Apple IIe ROM Decoder for Digilent Waveforms:&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t"></a><a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders</a></li> <li>Live Stream List: <ul> <li>Parts 1, 2, and 4 are lost forever! (well, from Twitch)</li> <li><a href="https://www.twitch.tv/videos/1089601642" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 3: Portable Apple II HW Design in KiCad (Aborted Breakout board)</a></li> <li><a href="https://www.twitch.tv/videos/1093149358" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 5: VGC Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100399285" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 6: W65c02 Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100401376" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 7: MEGA-][ Prototype PCB</a></li> <li><a href="https://www.twitch.tv/videos/1100403441" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 8: Measuring ASICs on the Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1103849646" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 9: Continued MEGA-][ Design</a></li> <li><a href="https://www.twitch.tv/videos/1103857244" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 10: Creating the 65c02 proto-pcb</a></li> <li><a href="https://www.twitch.tv/videos/1103867671" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 11: First look at emulating Keyboard ROM</a></li> <li><span style="font-family:inherit;"></span><a style="font-family:inherit;" href="https://www.twitch.tv/videos/1103936449" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 12: Attempting to use an Arduino Mega 2560 to emulate the keyboard ROM. (We failed and the logic analyzer shows why.)</a></li> <li><a href="https://www.twitch.tv/videos/1108436774" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 13: Learning how to program the Pi Pico PIO, so we can use it to emulate the Keyboard ROM</a></li> <li><a href="https://www.twitch.tv/videos/1108446628" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 14 Connecting the Pi PIco to a real Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1108452083" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 15: Soldering the analog section of the Video Prototype board</a></li> <li><a href="https://www.twitch.tv/videos/1108502342" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 16: Video and VGC oscilloscope measurements on a working IIgs</a></li> <li><a href="https://www.twitch.tv/videos/1108517653" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 17: Soldering 65C02 Prototype board (and partial test)</a></li> <li><a href="https://www.twitch.tv/videos/1108545083" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 18: Soldering MEGA-II Prototype board (but no testing)</a></li> <li><a href="https://www.twitch.tv/videos/1108552945" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 19: Removing the MEGA, DRAMs, DAC Resistor Packs, and Inductors from a working IIgs. (And then testing the clock dividers on the MEGA!)</a></li> <li><a href="https://www.twitch.tv/videos/1115660826" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 20: Finish soldering the VGC Rev 1 Board.</a></li> <li><a href="https://www.twitch.tv/videos/1115668877" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 21:Last solder focused stream for the rev 1 boards....</a></li> <li><a href="https://www.twitch.tv/videos/1115681153" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 22: Early Turn-On. (Lots of logic analyzer work in this one.)</a></li> <li><a href="https://www.twitch.tv/videos/1115687677" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 23: Verifying the MEGA-II refreshes the DRAM.</a></li> <li><a href="https://www.twitch.tv/videos/1115693654" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 24: Major Milestone: We booted the Apple IIe ROM!!!! (kinda)</a></li> <li><a href="https://www.twitch.tv/videos/1115707596" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 25: Debugging the non-booting (with working video)</a></li> <li><a href="https://www.twitch.tv/videos/1115717881" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 26:This was it! The first boot Passed self-test and got to an Apple prompt (then crashed.)</a></li> <li><a href="https://www.twitch.tv/videos/1134098415" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Part 27: Attempting to get the Pi Pico PIO to make the databus happy.</a></li> </ul> </li> <li>Short Clips <ul> <li><a href="https://www.twitch.tv/videos/1115687676" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Digilent Digital Discovery Logic analyzer showing 65c02 chasing its&hellip;</a></li> <li><a href="https://clips.twitch.tv/DarlingOddAdminOSsloth-mlyplWCnhfDNCTM2" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">Skip to the good part of #26</a></li> </ul> </li> </ul> <h3 id="mcetoc_1foiv83rt0">Bill of Material:</h3> <p></p> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-80241" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805,2726213,2528523,2293786,2843551,2060092,1085315&nsku=83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('80241'));" data-farnell="3528805,2726213,2528523,2293786,2843551,2060092,1085315" data-newark="83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Kit</a> </th> </tr> <tr> <td>Tablet Oscilloscope</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-78dc2" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805&nsku=83AH9505&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('78dc2'));" data-farnell="3528805" data-newark="83AH9505" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Digital Discovery</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-a0e53" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2726213&nsku=40AH1651&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a0e53'));" data-farnell="2726213" data-newark="40AH1651" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Analog Discovery 2</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-e3045" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2528523&nsku=78Y9722&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e3045'));" data-farnell="2528523" data-newark="78Y9722" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Surface Mount Test Points</td> <td>Harwin</td> <td>1</td> <td><a id="e14-product-link-a59c8" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2293786&nsku=75R5336&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a59c8'));" data-farnell="2293786" data-newark="75R5336" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>40 Pin Socket</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-c5c23" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2843551&nsku=50AC5450&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c5c23'));" data-farnell="2843551" data-newark="50AC5450" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>100 ohm resistor network</td> <td>Panasonic</td> <td>1</td> <td><a id="e14-product-link-c0b92" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2060092&nsku=65T9085&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c0b92'));" data-farnell="2060092" data-newark="65T9085" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Octal Bus Transceiver (HCT245)</td> <td>Nexperia</td> <td>1</td> <td><a id="e14-product-link-95ac9" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1085315&nsku=71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('95ac9'));" data-farnell="1085315" data-newark="71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <h3 id="mcetoc_1foiv83rt0">Additional Parts:</h3> <table> <tbody> <tr> <td>MEGA-][ ASIC from Apple IIgs</td> </tr> <tr> <td>VGC ASIC from Apple IIgs</td> </tr> <tr> <td>W65c02 from Western Design Center (WDC)</td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/" data-e14adj="t"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/" data-e14adj="t">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3704/vcp-biography-james" data-e14adj="t">About James</a>&nbsp;<span style="padding-right:5px;"></span><strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/" data-e14adj="t">Project Videos</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: mini iie, bald engineer, baldengineer, eprom, apple II, element14 presents, mac, friday_release</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532/revision/4Wed, 23 Feb 2022 18:07:50 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7aa253c4-1c47-41ee-820f-b933f5dd250akellyhensenhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532#commentsRevision 4 posted to Documents by kellyhensen on 2/23/2022 6:07:50 PM<br /> <p><a href="https://www.youtube.com/watch?v=vKhUGuODqOM">www.youtube.com/watch</a>&nbsp;</p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:740px;padding:8px;">Inside of the Apple IIgs computer is a chip called the MEGA-II. Many sources call this an &ldquo;Apple IIe on a chip.&rdquo; Turns out, that might be a bit of a stretch. For this build, James shows how he removed the chip from a 1990-vintage Apple IIgs and put it into a custom-designed prototype. Spoiler: It takes more than 1 chip to make a bootable Apple IIe clone, using a combination of original vintage and modern parts.</p> <h3 id="mcetoc_1foiv83rt0">Supplemental Content:</h3> <ul> <li><a href="/challenges-projects/element14-presents/project-videos/w/documents/4141/episode-517-emulate-an-eprom---how-hard-could-it-be">Episode 517: Emulate an EPROM - How Hard Could it Be?</a></li> <li><a href="/challenges-projects/element14-presents/workbenchwednesdays/w/documents/4650/workbench-wednesday-18-digilent-analog-discovery-review">Workbench Wednesday 18: Digilent Analog Discovery Review</a></li> <li>Bit Preserve (Vintage Computer Schematics in KiCad):&nbsp;<a href="https://github.com/baldengineer/bit-preserve">https://github.com/baldengineer/bit-preserve</a></li> <li><a href="https://oshpark.com/">OSH Park (PCB Fab)</a></li> <li>Golden Delicious Design Files:&nbsp;&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious">https://github.com/baldengineer/Golden-Delicious</a></li> <li>Apple IIe ROM Decoder for Digilent Waveforms:&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders"></a><a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders">https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders</a></li> <li>Live Stream List: <ul> <li>Parts 1, 2, and 4 are lost forever! (well, from Twitch)</li> <li><a href="https://www.twitch.tv/videos/1089601642">Part 3: Portable Apple II HW Design in KiCad (Aborted Breakout board)</a></li> <li><a href="https://www.twitch.tv/videos/1093149358">Part 5: VGC Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100399285">Part 6: W65c02 Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100401376">Part 7: MEGA-][ Prototype PCB</a></li> <li><a href="https://www.twitch.tv/videos/1100403441">Part 8: Measuring ASICs on the Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1103849646">Part 9: Continued MEGA-][ Design</a></li> <li><a href="https://www.twitch.tv/videos/1103857244">Part 10: Creating the 65c02 proto-pcb</a></li> <li><a href="https://www.twitch.tv/videos/1103867671">Part 11: First look at emulating Keyboard ROM</a></li> <li><span style="font-family:inherit;"></span><a style="font-family:inherit;" href="https://www.twitch.tv/videos/1103936449">Part 12: Attempting to use an Arduino Mega 2560 to emulate the keyboard ROM. (We failed and the logic analyzer shows why.)</a></li> <li><a href="https://www.twitch.tv/videos/1108436774">Part 13: Learning how to program the Pi Pico PIO, so we can use it to emulate the Keyboard ROM</a></li> <li><a href="https://www.twitch.tv/videos/1108446628">Part 14 Connecting the Pi PIco to a real Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1108452083">Part 15: Soldering the analog section of the Video Prototype board</a></li> <li><a href="https://www.twitch.tv/videos/1108502342">Part 16: Video and VGC oscilloscope measurements on a working IIgs</a></li> <li><a href="https://www.twitch.tv/videos/1108517653">Part 17: Soldering 65C02 Prototype board (and partial test)</a></li> <li><a href="https://www.twitch.tv/videos/1108545083">Part 18: Soldering MEGA-II Prototype board (but no testing)</a></li> <li><a href="https://www.twitch.tv/videos/1108552945">Part 19: Removing the MEGA, DRAMs, DAC Resistor Packs, and Inductors from a working IIgs. (And then testing the clock dividers on the MEGA!)</a></li> <li><a href="https://www.twitch.tv/videos/1115660826">Part 20: Finish soldering the VGC Rev 1 Board.</a></li> <li><a href="https://www.twitch.tv/videos/1115668877">Part 21:Last solder focused stream for the rev 1 boards....</a></li> <li><a href="https://www.twitch.tv/videos/1115681153">Part 22: Early Turn-On. (Lots of logic analyzer work in this one.)</a></li> <li><a href="https://www.twitch.tv/videos/1115687677">Part 23: Verifying the MEGA-II refreshes the DRAM.</a></li> <li><a href="https://www.twitch.tv/videos/1115693654">Part 24: Major Milestone: We booted the Apple IIe ROM!!!! (kinda)</a></li> <li><a href="https://www.twitch.tv/videos/1115707596">Part 25: Debugging the non-booting (with working video)</a></li> <li><a href="https://www.twitch.tv/videos/1115717881">Part 26:This was it! The first boot Passed self-test and got to an Apple prompt (then crashed.)</a></li> <li><a href="https://www.twitch.tv/videos/1134098415">Part 27: Attempting to get the Pi Pico PIO to make the databus happy.</a></li> </ul> </li> <li>Short Clips <ul> <li><a href="https://www.twitch.tv/videos/1115687676">Digilent Digital Discovery Logic analyzer showing 65c02 chasing its&hellip;</a></li> <li><a href="https://clips.twitch.tv/DarlingOddAdminOSsloth-mlyplWCnhfDNCTM2">Skip to the good part of #26</a></li> </ul> </li> </ul> <h3 id="mcetoc_1foiv83rt0">Bill of Material:</h3> <p></p> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-2f978" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805,2726213,2528523,2293786,2843551,2060092,1085315&nsku=83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2f978'));" data-farnell="3528805,2726213,2528523,2293786,2843551,2060092,1085315" data-newark="83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Kit</a> </th> </tr> <tr> <td>Tablet Oscilloscope</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-74bb0" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805&nsku=83AH9505&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('74bb0'));" data-farnell="3528805" data-newark="83AH9505" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Digital Discovery</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-8e3d4" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2726213&nsku=40AH1651&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('8e3d4'));" data-farnell="2726213" data-newark="40AH1651" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Analog Discovery 2</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-1c09b" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2528523&nsku=78Y9722&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('1c09b'));" data-farnell="2528523" data-newark="78Y9722" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Surface Mount Test Points</td> <td>Harwin</td> <td>1</td> <td><a id="e14-product-link-41fbf" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2293786&nsku=75R5336&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('41fbf'));" data-farnell="2293786" data-newark="75R5336" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>40 Pin Socket</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-38a8a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2843551&nsku=50AC5450&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('38a8a'));" data-farnell="2843551" data-newark="50AC5450" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>100 ohm resistor network</td> <td>Panasonic</td> <td>1</td> <td><a id="e14-product-link-95344" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2060092&nsku=65T9085&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('95344'));" data-farnell="2060092" data-newark="65T9085" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Octal Bus Transceiver (HCT245)</td> <td>Nexperia</td> <td>1</td> <td><a id="e14-product-link-6f11d" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1085315&nsku=71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('6f11d'));" data-farnell="1085315" data-newark="71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <h3 id="mcetoc_1foiv83rt0">Additional Parts:</h3> <table> <tbody> <tr> <td>MEGA-][ ASIC from Apple IIgs</td> </tr> <tr> <td>VGC ASIC from Apple IIgs</td> </tr> <tr> <td>W65c02 from Western Design Center (WDC)</td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3704/vcp-biography-james">About James</a>&nbsp;<span style="padding-right:5px;"></span><strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: mini iie, bald engineer, baldengineer, eprom, apple II, element14 presents, mac, friday_release</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532/revision/3Wed, 02 Feb 2022 19:19:49 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7aa253c4-1c47-41ee-820f-b933f5dd250atariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532#commentsRevision 3 posted to Documents by tariq.ahmad on 2/2/2022 7:19:49 PM<br /> <p><a href="https://www.youtube.com/watch?v=vKhUGuODqOM">www.youtube.com/watch</a>&nbsp;</p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:740px;padding:8px;">Inside of the Apple IIgs computer is a chip called the MEGA-II. Many sources call this an &ldquo;Apple IIe on a chip.&rdquo; Turns out, that might be a bit of a stretch. For this build, James shows how he removed the chip from a 1990-vintage Apple IIgs and put it into a custom-designed prototype. Spoiler: It takes more than 1 chip to make a bootable Apple IIe clone, using a combination of original vintage and modern parts.</p> <h3 id="mcetoc_1foiv83rt0">Supplemental Content:</h3> <ul> <li><a href="/challenges-projects/element14-presents/project-videos/w/documents/4141/episode-517-emulate-an-eprom---how-hard-could-it-be">Episode 517: Emulate an EPROM - How Hard Could it Be?</a></li> <li><a href="/challenges-projects/element14-presents/workbenchwednesdays/w/documents/4650/workbench-wednesday-18-digilent-analog-discovery-review">Workbench Wednesday 18: Digilent Analog Discovery Review</a></li> <li>Bit Preserve (Vintage Computer Schematics in KiCad):&nbsp;<a href="https://github.com/baldengineer/bit-preserve">https://github.com/baldengineer/bit-preserve</a></li> <li><a href="https://oshpark.com/">OSH Park (PCB Fab)</a></li> <li>Golden Delicious Design Files:&nbsp;&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious">https://github.com/baldengineer/Golden-Delicious</a></li> <li>Apple IIe ROM Decoder for Digilent Waveforms:&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders"></a><a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders">https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders</a></li> <li>Live Stream List: <ul> <li>Parts 1, 2, and 4 are lost forever! (well, from Twitch)</li> <li><a href="https://www.twitch.tv/videos/1089601642">Part 3: Portable Apple II HW Design in KiCad (Aborted Breakout board)</a></li> <li><a href="https://www.twitch.tv/videos/1093149358">Part 5: VGC Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100399285">Part 6: W65c02 Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100401376">Part 7: MEGA-][ Prototype PCB</a></li> <li><a href="https://www.twitch.tv/videos/1100403441">Part 8: Measuring ASICs on the Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1103849646">Part 9: Continued MEGA-][ Design</a></li> <li><a href="https://www.twitch.tv/videos/1103857244">Part 10: Creating the 65c02 proto-pcb</a></li> <li><a href="https://www.twitch.tv/videos/1103867671">Part 11: First look at emulating Keyboard ROM</a></li> <li><span style="font-family:inherit;"></span><a style="font-family:inherit;" href="https://www.twitch.tv/videos/1103936449">Part 12: Attempting to use an Arduino Mega 2560 to emulate the keyboard ROM. (We failed and the logic analyzer shows why.)</a></li> <li><a href="https://www.twitch.tv/videos/1108436774">Part 13: Learning how to program the Pi Pico PIO, so we can use it to emulate the Keyboard ROM</a></li> <li><a href="https://www.twitch.tv/videos/1108446628">Part 14 Connecting the Pi PIco to a real Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1108452083">Part 15: Soldering the analog section of the Video Prototype board</a></li> <li><a href="https://www.twitch.tv/videos/1108502342">Part 16: Video and VGC oscilloscope measurements on a working IIgs</a></li> <li><a href="https://www.twitch.tv/videos/1108517653">Part 17: Soldering 65C02 Prototype board (and partial test)</a></li> <li><a href="https://www.twitch.tv/videos/1108545083">Part 18: Soldering MEGA-II Prototype board (but no testing)</a></li> <li><a href="https://www.twitch.tv/videos/1108552945">Part 19: Removing the MEGA, DRAMs, DAC Resistor Packs, and Inductors from a working IIgs. (And then testing the clock dividers on the MEGA!)</a></li> <li><a href="https://www.twitch.tv/videos/1115660826">Part 20: Finish soldering the VGC Rev 1 Board.</a></li> <li><a href="https://www.twitch.tv/videos/1115668877">Part 21:Last solder focused stream for the rev 1 boards....</a></li> <li><a href="https://www.twitch.tv/videos/1115681153">Part 22: Early Turn-On. (Lots of logic analyzer work in this one.)</a></li> <li><a href="https://www.twitch.tv/videos/1115687677">Part 23: Verifying the MEGA-II refreshes the DRAM.</a></li> <li><a href="https://www.twitch.tv/videos/1115693654">Part 24: Major Milestone: We booted the Apple IIe ROM!!!! (kinda)</a></li> <li><a href="https://www.twitch.tv/videos/1115707596">Part 25: Debugging the non-booting (with working video)</a></li> <li><a href="https://www.twitch.tv/videos/1115717881">Part 26:This was it! The first boot Passed self-test and got to an Apple prompt (then crashed.)</a></li> <li><a href="https://www.twitch.tv/videos/1134098415">Part 27: Attempting to get the Pi Pico PIO to make the databus happy.</a></li> </ul> </li> <li>Short Clips <ul> <li><a href="https://www.twitch.tv/videos/1115687676">Digilent Digital Discovery Logic analyzer showing 65c02 chasing its&hellip;</a></li> <li><a href="https://clips.twitch.tv/DarlingOddAdminOSsloth-mlyplWCnhfDNCTM2">Skip to the good part of #26</a></li> </ul> </li> </ul> <h3 id="mcetoc_1foiv83rt0">Bill of Material:</h3> <p></p> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-ba29e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805,2726213,2528523,2293786,2843551,2060092,1085315&nsku=83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ba29e'));" data-farnell="3528805,2726213,2528523,2293786,2843551,2060092,1085315" data-newark="83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Kit</a> </th> </tr> <tr> <td>Tablet Oscilloscope</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-3f74f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805&nsku=83AH9505&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('3f74f'));" data-farnell="3528805" data-newark="83AH9505" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Digital Discovery</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-e22f0" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2726213&nsku=40AH1651&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e22f0'));" data-farnell="2726213" data-newark="40AH1651" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Analog Discovery 2</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-8fdba" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2528523&nsku=78Y9722&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('8fdba'));" data-farnell="2528523" data-newark="78Y9722" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Surface Mount Test Points</td> <td>Harwin</td> <td>1</td> <td><a id="e14-product-link-c50b9" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2293786&nsku=75R5336&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c50b9'));" data-farnell="2293786" data-newark="75R5336" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>40 Pin Socket</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-e9068" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2843551&nsku=50AC5450&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e9068'));" data-farnell="2843551" data-newark="50AC5450" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>100 ohm resistor network</td> <td>Panasonic</td> <td>1</td> <td><a id="e14-product-link-684bc" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2060092&nsku=65T9085&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('684bc'));" data-farnell="2060092" data-newark="65T9085" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Octal Bus Transceiver (HCT245)</td> <td>Nexperia</td> <td>1</td> <td><a id="e14-product-link-53043" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1085315&nsku=71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('53043'));" data-farnell="1085315" data-newark="71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <h3 id="mcetoc_1foiv83rt0">Additional Parts:</h3> <table> <tbody> <tr> <td>MEGA-][ ASIC from Apple IIgs</td> </tr> <tr> <td>VGC ASIC from Apple IIgs</td> </tr> <tr> <td>W65c02 from Western Design Center (WDC)</td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3704/vcp-biography-james">About James</a>&nbsp;<span style="padding-right:5px;"></span><strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: mini iie</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532/revision/2Tue, 04 Jan 2022 17:31:08 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7aa253c4-1c47-41ee-820f-b933f5dd250atariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532#commentsRevision 2 posted to Documents by tariq.ahmad on 1/4/2022 5:31:08 PM<br /> <p><a href="https://www.youtube.com/watch?v=vKhUGuODqOM">www.youtube.com/watch</a>&nbsp;</p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:740px;padding:8px;">Inside of the Apple IIgs computer is a chip called the MEGA-II. Many sources call this an &ldquo;Apple IIe on a chip.&rdquo; Turns out, that might be a bit of a stretch. For this build, James shows how he removed the chip from a 1990-vintage Apple IIgs and put it into a custom-designed prototype. Spoiler: It takes more than 1 chip to make a bootable Apple IIe clone, using a combination of original vintage and modern parts.</p> <h3 id="mcetoc_1foiv83rt0">Supplemental Content:</h3> <ul> <li><a href="/challenges-projects/element14-presents/project-videos/w/documents/4141/episode-517-emulate-an-eprom---how-hard-could-it-be">Episode 517: Emulate an EPROM - How Hard Could it Be?</a></li> <li><a href="/challenges-projects/element14-presents/workbenchwednesdays/w/documents/4650/workbench-wednesday-18-digilent-analog-discovery-review">Workbench Wednesday 18: Digilent Analog Discovery Review</a></li> <li>Bit Preserve (Vintage Computer Schematics in KiCad):&nbsp;<a href="https://github.com/baldengineer/bit-preserve">https://github.com/baldengineer/bit-preserve</a></li> <li><a href="https://oshpark.com/">OSH Park (PCB Fab)</a></li> <li>Golden Delicious Design Files:&nbsp;&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious">https://github.com/baldengineer/Golden-Delicious</a></li> <li>Apple IIe ROM Decoder for Digilent Waveforms:&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders"></a><a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders">https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders</a></li> <li>Live Stream List: <ul> <li>Parts 1, 2, and 4 are lost forever! (well, from Twitch)</li> <li><a href="https://www.twitch.tv/videos/1089601642">Part 3: Portable Apple II HW Design in KiCad (Aborted Breakout board)</a></li> <li><a href="https://www.twitch.tv/videos/1093149358">Part 5: VGC Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100399285">Part 6: W65c02 Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100401376">Part 7: MEGA-][ Prototype PCB</a></li> <li><a href="https://www.twitch.tv/videos/1100403441">Part 8: Measuring ASICs on the Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1103849646">Part 9: Continued MEGA-][ Design</a></li> <li><a href="https://www.twitch.tv/videos/1103857244">Part 10: Creating the 65c02 proto-pcb</a></li> <li><a href="https://www.twitch.tv/videos/1103867671">Part 11: First look at emulating Keyboard ROM</a></li> <li><span style="font-family:inherit;"></span><a style="font-family:inherit;" href="https://www.twitch.tv/videos/1103936449">Part 12: Attempting to use an Arduino Mega 2560 to emulate the keyboard ROM. (We failed and the logic analyzer shows why.)</a></li> <li><a href="https://www.twitch.tv/videos/1108436774">Part 13: Learning how to program the Pi Pico PIO, so we can use it to emulate the Keyboard ROM</a></li> <li><a href="https://www.twitch.tv/videos/1108446628">Part 14 Connecting the Pi PIco to a real Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1108452083">Part 15: Soldering the analog section of the Video Prototype board</a></li> <li><a href="https://www.twitch.tv/videos/1108502342">Part 16: Video and VGC oscilloscope measurements on a working IIgs</a></li> <li><a href="https://www.twitch.tv/videos/1108517653">Part 17: Soldering 65C02 Prototype board (and partial test)</a></li> <li><a href="https://www.twitch.tv/videos/1108545083">Part 18: Soldering MEGA-II Prototype board (but no testing)</a></li> <li><a href="https://www.twitch.tv/videos/1108552945">Part 19: Removing the MEGA, DRAMs, DAC Resistor Packs, and Inductors from a working IIgs. (And then testing the clock dividers on the MEGA!)</a></li> <li><a href="https://www.twitch.tv/videos/1115660826">Part 20: Finish soldering the VGC Rev 1 Board.</a></li> <li><a href="https://www.twitch.tv/videos/1115668877">Part 21:Last solder focused stream for the rev 1 boards....</a></li> <li><a href="https://www.twitch.tv/videos/1115681153">Part 22: Early Turn-On. (Lots of logic analyzer work in this one.)</a></li> <li><a href="https://www.twitch.tv/videos/1115687677">Part 23: Verifying the MEGA-II refreshes the DRAM.</a></li> <li><a href="https://www.twitch.tv/videos/1115693654">Part 24: Major Milestone: We booted the Apple IIe ROM!!!! (kinda)</a></li> <li><a href="https://www.twitch.tv/videos/1115707596">Part 25: Debugging the non-booting (with working video)</a></li> <li><a href="https://www.twitch.tv/videos/1115717881">Part 26:This was it! The first boot Passed self-test and got to an Apple prompt (then crashed.)</a></li> <li><a href="https://www.twitch.tv/videos/1134098415">Part 27: Attempting to get the Pi Pico PIO to make the databus happy.</a></li> </ul> </li> <li>Short Clips <ul> <li><a href="https://www.twitch.tv/videos/1115687676">Digilent Digital Discovery Logic analyzer showing 65c02 chasing its&hellip;</a></li> <li><a href="https://clips.twitch.tv/DarlingOddAdminOSsloth-mlyplWCnhfDNCTM2">Skip to the good part of #26</a></li> </ul> </li> </ul> <h3 id="mcetoc_1foiv83rt0">Bill of Material:</h3> <p></p> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-8c636" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805,2726213,2528523,2293786,2843551,2060092,1085315&nsku=83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('8c636'));" data-farnell="3528805,2726213,2528523,2293786,2843551,2060092,1085315" data-newark="83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Kit</a> </th> </tr> <tr> <td>Tablet Oscilloscope</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-9ea86" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805&nsku=83AH9505&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('9ea86'));" data-farnell="3528805" data-newark="83AH9505" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Digital Discovery</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-aac64" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2726213&nsku=40AH1651&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('aac64'));" data-farnell="2726213" data-newark="40AH1651" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Analog Discovery 2</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-a24f7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2528523&nsku=78Y9722&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a24f7'));" data-farnell="2528523" data-newark="78Y9722" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Surface Mount Test Points</td> <td>Harwin</td> <td>1</td> <td><a id="e14-product-link-3fa72" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2293786&nsku=75R5336&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('3fa72'));" data-farnell="2293786" data-newark="75R5336" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>40 Pin Socket</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-a6afb" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2843551&nsku=50AC5450&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a6afb'));" data-farnell="2843551" data-newark="50AC5450" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>100 ohm resistor network</td> <td>Panasonic</td> <td>1</td> <td><a id="e14-product-link-1c9d6" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2060092&nsku=65T9085&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('1c9d6'));" data-farnell="2060092" data-newark="65T9085" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Octal Bus Transceiver (HCT245)</td> <td>Nexperia</td> <td>1</td> <td><a id="e14-product-link-367aa" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1085315&nsku=71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('367aa'));" data-farnell="1085315" data-newark="71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <h3 id="mcetoc_1foiv83rt0">Additional Parts:</h3> <table> <tbody> <tr> <td>MEGA-][ ASIC from Apple IIgs</td> </tr> <tr> <td>VGC ASIC from Apple IIgs</td> </tr> <tr> <td>W65c02 from Western Design Center (WDC)</td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3704/vcp-biography-james">About James</a>&nbsp;<span style="padding-right:5px;"></span><strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532/revision/1Tue, 04 Jan 2022 17:04:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7aa253c4-1c47-41ee-820f-b933f5dd250atariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/27412/world-s-first-single-chip-apple-ii-boots----episode-532#commentsRevision 1 posted to Documents by tariq.ahmad on 1/4/2022 5:04:58 PM<br /> <p><a href="https://www.youtube.com/watch?v=vKhUGuODqOM">www.youtube.com/watch</a></p> <p style="margin:0;padding:0px;">&nbsp;</p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:740px;padding:8px;">Inside of the Apple IIgs computer is a chip called the MEGA-II. Many sources call this an &ldquo;Apple IIe on a chip.&rdquo; Turns out, that might be a bit of a stretch. For this build, James shows how he removed the chip from a 1990-vintage Apple IIgs and put it into a custom-designed prototype. Spoiler: It takes more than 1 chip to make a bootable Apple IIe clone, using a combination of original vintage and modern parts.</p> <h3 id="mcetoc_1foiv83rt0">Supplemental Content:</h3> <ul> <li><a href="/challenges-projects/element14-presents/project-videos/w/documents/4141/episode-517-emulate-an-eprom---how-hard-could-it-be">Episode 517: Emulate an EPROM - How Hard Could it Be?</a></li> <li><a href="/challenges-projects/element14-presents/workbenchwednesdays/w/documents/4650/workbench-wednesday-18-digilent-analog-discovery-review">Workbench Wednesday 18: Digilent Analog Discovery Review</a></li> <li>Bit Preserve (Vintage Computer Schematics in KiCad):&nbsp;<a href="https://github.com/baldengineer/bit-preserve">https://github.com/baldengineer/bit-preserve</a></li> <li><a href="https://oshpark.com/">OSH Park (PCB Fab)</a></li> <li>Golden Delicious Design Files:&nbsp;&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious">https://github.com/baldengineer/Golden-Delicious</a></li> <li>Apple IIe ROM Decoder for Digilent Waveforms:&nbsp;<a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders"></a><a href="https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders">https://github.com/baldengineer/Golden-Delicious/tree/master/waveforms%20decoders</a></li> <li>Live Stream List: <ul> <li>Parts 1, 2, and 4 are lost forever! (well, from Twitch)</li> <li><a href="https://www.twitch.tv/videos/1089601642">Part 3: Portable Apple II HW Design in KiCad (Aborted Breakout board)</a></li> <li><a href="https://www.twitch.tv/videos/1093149358">Part 5: VGC Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100399285">Part 6: W65c02 Prototype PCB Design</a></li> <li><a href="https://www.twitch.tv/videos/1100401376">Part 7: MEGA-][ Prototype PCB</a></li> <li><a href="https://www.twitch.tv/videos/1100403441">Part 8: Measuring ASICs on the Apple IIe</a></li> <li><a href="https://www.twitch.tv/videos/1103849646">Part 9: Continued MEGA-][ Design</a></li> <li><a href="https://www.twitch.tv/videos/1103857244">Part 10: Creating the 65c02 proto-pcb</a></li> <li><a href="https://www.twitch.tv/videos/1103867671">Part 11: First look at emulating Keyboard ROM</a></li> </ul> </li> </ul> <h3 id="mcetoc_1foj023s04"></h3> <h3 id="mcetoc_1foj024o25"></h3> <h3 id="mcetoc_1foiv83rt0">Bill of Material:</h3> <p></p> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-e0601" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805,2726213,2528523,2293786,2843551,2060092,1085315&nsku=83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e0601'));" data-farnell="3528805,2726213,2528523,2293786,2843551,2060092,1085315" data-newark="83AH9505,40AH1651,78Y9722,75R5336,50AC5450,65T9085,71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Kit</a> </th> </tr> <tr> <td>Tablet Oscilloscope</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-a1b4f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3528805&nsku=83AH9505&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a1b4f'));" data-farnell="3528805" data-newark="83AH9505" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Digital Discovery</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-3085e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2726213&nsku=40AH1651&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('3085e'));" data-farnell="2726213" data-newark="40AH1651" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Analog Discovery 2</td> <td>Digilent</td> <td>1</td> <td><a id="e14-product-link-57ab7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2528523&nsku=78Y9722&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('57ab7'));" data-farnell="2528523" data-newark="78Y9722" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Surface Mount Test Points</td> <td>Harwin</td> <td>1</td> <td><a id="e14-product-link-b0a15" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2293786&nsku=75R5336&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('b0a15'));" data-farnell="2293786" data-newark="75R5336" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>40 Pin Socket</td> <td>Multicomp Pro</td> <td>1</td> <td><a id="e14-product-link-c4742" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2843551&nsku=50AC5450&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c4742'));" data-farnell="2843551" data-newark="50AC5450" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>100 ohm resistor network</td> <td>Panasonic</td> <td>1</td> <td><a id="e14-product-link-3276a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2060092&nsku=65T9085&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('3276a'));" data-farnell="2060092" data-newark="65T9085" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr> <td>Octal Bus Transceiver (HCT245)</td> <td>Nexperia</td> <td>1</td> <td><a id="e14-product-link-d9416" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1085315&nsku=71R1453&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('d9416'));" data-farnell="1085315" data-newark="71R1453" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <h3 id="mcetoc_1foiv83rt0">Additional Parts:</h3> <table> <tbody> <tr> <td>MEGA-][ ASIC from Apple IIgs</td> </tr> <tr> <td>VGC ASIC from Apple IIgs</td> </tr> <tr> <td>W65c02 from Western Design Center (WDC)</td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" 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