3) Locate the BIOS chip on the motherboard The location of the BIOS chip on the motherboard is not always very clear. Maybe X5 programming was more than was required (possibly X3 would work). While connecting the IC to the programmer, make sure the motherboard is powerless and the programmer is not connected to USB either as this could potentially corrupt/erase or even break the BIOS chip. EVERYTHING MATCHED 4/ Also did the normal minipro Verify option & that passed too. 1/ Filled the code memory with zeros, 2/ Read in the GAL chip into code memory 3/ Compared every page of the code memory with the screen shots of the. I started the minipro s/w & programmer from fresh. But to check that my experiment has worked. This afternoon I'll put the GAL onto a bread board and wire it up and check the logic. In the Online-Shop you can buy new, programmed ICs and BIOS-Chips (Flash-Eeproms, Serial-Eeproms), or we can re-program your old chips in the following. JED file (I took screen shots of each page of the program for later checking) 3/ In the Options section unchecked the "Erase before" and unchecked the "Verify after" 4/ In the IC Config section unchecked the "Encrypt" 5/ Programmed the chip, X5 times one after the other And that seems to have fixed it. So what I did was : 1/ Erased the GAL, read it back into code memory & confirmed all bits="1" 2/ Loaded into code memory my. I am using a GAL16V8D and tried programming it & got the issue as described earlier in this thread.
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