Tell me why do/did you need those PALs?
Also tell me the exact model of your card REV 3 or REV 4, originally was it 25MHz, 40MHz or 50MHz?
You can remove 8 PALs all and boot the card without them, but RAM, SCSI and card will be slower than 68000, but you can see if the card boots at all.
I have collected some GVP A2000-030 COMBO PAL .JEDs, but it is not simple at all. Here is some facts:
Every card has some of the PALs security fused, this means you can read them ok, but the .JED will not work and the .JED-file checksum will not match the one printed on top of the chip.
One card had 7 PALs security fused and 1 not security fused. Another card had 1 PAL security fused and 7 not security fused. So it is totally random by the manufacturer. The PALs seem to work only in certain sets, if you replace PAL, you need to use .jed that has the exact same checksum. A PAL set from 25MHz will not work in 40MHz card, or one PAL taken from another card will not work in another card, if it is not with the same checsum as the original was.
Also PALs are one time programmable so even though you buy some NOS from ebay, you have only one attempt to program it. To make more sense you would need to convert PAL .jed to GAL .jed. I have done that, but so far it is quite hard to prove if GALs work at all because the card really boots even with some empty PALs or GALs in the sockets.
GAL programmers do not read those PALs corrently, they auto identify them as GALs and the .jed will be just trash. So far expensive Elnec Beeprog2 and more common Willem USB prommers are the only ones that managed to read good reads.
Also if you buy some empty chips notice there are 3 different types of socketed PAL chips in the card the U36 is different type than other 24-pin ones.
I have now wrote about this on this on multiple posts here and other forums, but there are not many who can help or know more, but if you see this and know something about this that I do not, then let me know also.
