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John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum > Arcade and Pinball Discussions > Beginner's Help Corner > TP18S030 Replacements?
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Author Topic: TP18S030 Replacements?  (Read 2237 times)
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LordKaT
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« on: August 24, 2015, 11:59:30 am »
I have a Universal Mr. Do board that I bought off ebay. The board seems to be in good shape, but the fuse PROM's have seen much better days. I've tried cleaning them up as much as I can, but I suspect one of them to be faulty.

Does anyone know if there's a suitable replacement for these fuse PROM's or a way to replicate their function? I'd rather not sacrifice another perfectly good Mr. Do to resurrect this one.

Thanks!
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iankellogg
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« Reply #1 on: August 24, 2015, 12:52:44 pm »
so far the only person i know that can burn these is this guy http://www.hobbyroms.com/
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LordKaT
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« Reply #2 on: August 24, 2015, 01:51:43 pm »
Do you think using something like a GAL might be possible if I built an adapter board?
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iankellogg
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« Reply #3 on: August 24, 2015, 01:52:53 pm »
you could use a GAL, you could even use a modern chip too as long as you are okay with having the adapter board on there.
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LordKaT
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« Reply #4 on: August 24, 2015, 02:08:37 pm »
I will research this more. The chip timings will be a bitch :#
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iankellogg
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« Reply #5 on: August 24, 2015, 02:12:25 pm »
not really that bad. stay under 50ns and you are fine. Even then a lot of those chips are in the 100ns range. Modern chips are down below 10ns.
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