John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum
November 22, 2024, 06:22:14 pm *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the John's Arcade Forum. Glad you made it! Smiley
 
   Home   Help Search Calendar Login Register  
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?
Pages: [1]
« previous next »
  Print  
Author Topic: TP18S030 Replacements?  (Read 2230 times)
0 Members and 1 Guest are viewing this topic.
LordKaT
Guest
« 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!
Logged
iankellogg
Global Moderator
Hero Member
*****
Offline Offline

Posts: 1433



View Profile
« 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/
Logged
https://iankellogg.com
Cap kits, eproms, and more
LordKaT
Guest
« 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?
Logged
iankellogg
Global Moderator
Hero Member
*****
Offline Offline

Posts: 1433



View Profile
« 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.
Logged
https://iankellogg.com
Cap kits, eproms, and more
LordKaT
Guest
« Reply #4 on: August 24, 2015, 02:08:37 pm »
I will research this more. The chip timings will be a bitch :#
Logged
iankellogg
Global Moderator
Hero Member
*****
Offline Offline

Posts: 1433



View Profile
« 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.
Logged
https://iankellogg.com
Cap kits, eproms, and more
Pages: [1]
  Print  
« previous next »
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Install Simple Machines Forum Valid XHTML 1.0! Valid CSS!