Can anyone tell me what code this is?

There's only one microprocessor I know of that has a SEX instruction.  It was the first CMOS microprocessor and was produced by the company that pioneered CMOS.  The company originally called it COS/MOS: COmplementary-Symmetry Metal-Oxide Semiconductor.

To avoid spoiling the game for others, I won't name the company or processor.  But I found it quickly at Wikipedia, and the page has your assembly language listing

I can't believe I still remember that chip.  It's not like I ever used it.  IIRC I looked at the instruction set and found it pretty ugly.  I think its chief advantage was that COS/MOS could be powered from 3V to 15V, so the "SEX machine" was a good fit for industrial applications where you needed really wide noise margins.  COS/MOS was also really low power, drawing next to nothing at low frequencies.

Without looking I do at least know which one the COS/MOS processor is, having never used it I did not recognize the code.

The Motorola 6809 processor also has a sex (sign extend) instruction and it has a bra (branch always) instruction too.

Much too easy - just Google the first 5 lines of code.

I considered using one a long time ago but we never did - Motorola brought out a CMOS 6805 just in time.

MK.

Hey clem57, how did you come across the "SEX Machine?"  It's a pretty obscure chip.

What's next, a quiz about the National 32008?

Intersil semiconductor

CDP1802

..  TEST ALU OPS

0000 90         GHI 0     .. SET UP R6

0001 B6         PHI 6

0002 F829       LDI DOIT  .. FOR INPUT OF OPCODE

0004 A6         PLO 6

0005 E0         SEX 0     .. (X=0 ALREADY)

0006 6400       OUT 4,00  .. ANNOUNCE US READY

0008 E6         SEX 6     .. NOW X=6

0009 3F09       BN4 *     .. WAIT FOR IT

000B 6C         INP 4     .. OK, GET IT

000C 64         OUT 4     .. AND ECHO TO DISPLAY

000D 370D       B4 *      .. WAIT FOR RELEASE

000F F860       LDI #60   .. NOW GET READY FOR

0011 A6         PLO 6     .. FIRST OPERAND

0012 E0         SEX 0     .. SAY SO

0013 6401       OUT 4,01

0015 3F15       BN4 *

0017 E6         SEX 6     .. TAKE IT IN AND ECHO

0018 6C         INP 4     .. (TO 0060)

0019 64         OUT 4     .. (ALSO INCREMENT R6)

001A 371A       B4 *

001C E0         SEX 0     .. DITTO SECOND OPERAND

001D 6402       OUT 4,02

001F E6         SEX 6

0020 3F20 LOOP: BN4 *     .. WAIT FOR IT

0022 6C         INP 4     .. GET IT (NOTE: X=6)

0023 64         OUT 4     .. ECHO IT

0024 3724       B4 *      .. WAIT FOR RELEASE

0026 26         DEC 6     .. BACK UP R6 TO 0060

0027 26         DEC 6

0028 46         LDA 6     .. GET 1ST OPERAND TO D

0029 C4   DOIT: NOP       .. DO OPERATION

002A C4         NOP       .. (SPARE)

002B 26         DEC 6     .. BACK TO 0060

002C 56         STR 6     .. OUTPUT RESULT

002D 64         OUT 4     .. (X=6 STILL)

002E 7A         REQ       .. TURN OFF Q

002F CA0020     LBNZ LOOP .. THEN IF ZERO,

0032 7B         SEQ       .. TURN IT ON AGAIN

0033 3020       BR LOOP   .. REPEAT IN ANY CASE

I was browsing RCA and came across this on a list of things they did.

Clem

From Wikipedia for 4000 series

• They were introduced by RCA as CD4000 COS/MOS series in 1968
• COSMOS, standing for COmplementary Symmetry Metal-Oxide Semiconductor
• 4000 series parts have the advantage of lower power consumption
• Wider range of supply voltages (3 V to 15 V)
• Although all semiconductors can be damaged by electrostatic discharge, the high impedance of CMOS inputs makes them more susceptible than bipolar transistor-based, TTL, devices
• The 4000 series integrated circuits have been used in space satellites for many decades!

Answers:

1. 4000 series
2. RCA
3. Test Alu Ops.

Since johnbeetem was first he gets the prize, with honorable mention for Capper

Thanks to all,

Clem

P.S. If you like this, I could be persuaded to do this weekly.

Another reference https://en.wikipedia.org/wiki/RCA_1802

What a great idea!  Put a SEX instruction and everyone will remember your processor forever!

I'll spare you my ideas for other 3 letter instructions that would also be memorable...

Joey Thompson wrote:

 

What a great idea!  Put a SEX instruction and everyone will remember your processor forever!

I'll spare you my ideas for other 3 letter instructions that would also be memorable...

IMO the only people likely to remember COSMAC for the SEX instruction are those who were at an impressionable age when it was released, and were avid assembly language programmers.  Given how little ASM is used these days, clever mnemonics aren't liable to get much traction any more.  My favorite from more recent processors is PowerPC's "eieio" instruction (Enforce In-order Execution of I/O).  I can't think of any particularly memorable ARM mnemonics.