Featured Articles
Announcing Pi
Technical Specifications
Raspberry Pi FAQs
Win a Pi
Raspberry Pi Wishlist
Actions
Forum Thread Details
  • Replies 21 replies
  • Subscribers 677 subscribers
  • Views 4123 views
  • Users 0 members are here
Related

Can you use a pi as an eeprom emulator?

razorx

hi guys i have some spare time on my hands and ive started looking into some retro consoles like the master system and im thinking of maybe making my own homebrew game, i already have a programmer and some M27C256B and AT28C256 eprom/eeproms and i was wondering for testing if there is a way to setup my raspberry pi as an emulator using the gpio instead of having to keep erasing and reprogramming the chips.

 

ive already looked into an actual eeprom emulator but there far too expensive is there anyone who can help me with this thank you.

Parents

  • You can make a fifo or lifo by attaching a counter to the address lines of a SRAM.

    You can dual-port it by using '244s, '245s and a little bit of glue logic.

    With two SRAMs you can set up a dual-port ping-pong.  Say 'master/slave' to your GF with a straight face!

    You can back it up on power-down with a coupla button cells and a low-drop diode.

     

    Of course, the host doesn't have to be anywhere near as fast as the SRAM.

Reply

  • You can make a fifo or lifo by attaching a counter to the address lines of a SRAM.

    You can dual-port it by using '244s, '245s and a little bit of glue logic.

    With two SRAMs you can set up a dual-port ping-pong.  Say 'master/slave' to your GF with a straight face!

    You can back it up on power-down with a coupla button cells and a low-drop diode.

     

    Of course, the host doesn't have to be anywhere near as fast as the SRAM.

Children
No Data