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4004 sim4-01 development systems

Dwight Elvey

Veteran Member
Joined
Jun 21, 2003
Messages
5,046
Location
Santa Cruz
For those that might have a SIM4-01 or a SIM4-02 with a MP7-03 programmer card, I've located the original AD542 EPROM. If you have the normal EPROM set AD540, 541 and 543, those are only used for 1702A chips and will damage 1702 chips for programming. They need shorter pulses and more rest time between programming pulses.
I don't know which versions of the MP7 programmers this will work with. I know that the MP7-03 has the timing for both A and nonA chips. Older versions may have modified timing for the A type so be careful as I know some of the older programmer cards had modifications to do 1702As faster.
I've finally located a 542 for the 1702. I believe this has code to go with the 540 and 541 to program 1702 ( non-A ). My understanding is that it will program 1702A chips as well but will be quite slow.
The MP7-03 has two different inputs used to trigger the pulse generators for the 1702 chips programming.
I need to disassemble it to make sure it works with the released versions of 540 and 541.
This has taken years to locate.
The code for 540, 541 and 543 is in the 4004 users manual on Bitsavers. It is assumed by 1973 that you'll not be getting any 1702 (nonA) EPROMs to program. Reading doesn't care which you have to read.
If anyone is interested, let me know.
 
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