Acclaim 51555 PCB compatibility

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Yolt1
Posts: 32
Joined: Sun Dec 05, 2021 12:48 am
Location: Brussels, Belgium

Re: Acclaim 51555 PCB compatibility

Post by Yolt1 »

lidnariq wrote: Sat Mar 09, 2024 1:27 am Probes exactly reversed
Hello there,

Thanks for your confirmation I took the time to check and here it is :
  • positive lead to GND / negative lead to pinX = 0,540v
  • negative lead to +5V / positive lead to pinX = 0,640v
The results were the same for pins 6, 7 and 8. (and also for pin 9 which is PRG-A0 address)
Hopefully this will "make sense" and somehow help you out in the understanding of these pins...
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lidnariq
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Posts: 11803
Joined: Sun Apr 13, 2008 11:12 am

Re: Acclaim 51555 PCB compatibility

Post by lidnariq »

Well, it confirms they're real pins - they're wire-bonded to something inside. My only guess is that they might be for cart RAM?
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