we are trying to build a device to program the MMI 6301 PROM, because all the ROM programmers around are really too expensive! (the DATA I/O 29/something is way too expensive for us!!!)
Does someone have any information about this or maybe have tried something similar?
We found this as a starting point:
circuitry for the required weird voltage levels to program the MMI 6301 seem not so difficult to create...
we already built a 2708 eprom reader (and almost programmer, but that's untested at the moment, it works only on our schematics ) using a PIC.
Any info is appreciated!