Today I finally got the CPU1 PAL completed. It was a bit of a pain with having too many product terms but its now done.
Ninja Warriors PAL dump added
PAL Updates
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Mar 082014
AAA16K4P RAM chips
General, Technical Info
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Mar 082014
A few weeks ago there was a post on KLOV asking what these chips were.
One of the replies to this was that they might be a PAL chip so my attention was caught.
I managed to borrow a PCB pretty quickly and determined that this was not a PAL chip.
A few users had already mentioned that the manufacturer made RAM chips and after doing some circuit drawing I found what type of RAM it is.
If you ever need to find a replacement for the above chip then look for MB81C68.
Asterix PAL dump added
PAL Updates
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Mar 062014
caius has dumped the 054253A labelled PAL chip from his Asterix PCB in response to a request on a couple of forums.
Thank you very much to caius
Namco System 1 SYS87A-C tested
PAL Updates
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Mar 042014
Today I got my Splatter House up and running and also managed to test the PAL I dumped.
SYS87A-C is fully working.
Mar 042014
Picked up a known faulty PCB of Splatter House a bit back.
At first it didn’t boot at all.
First up I found a 6809 CPU with some dead address lines. I replaced this but still no boot, this ended up being a dodgy socket connecting the CPU board to the ROM board.
NOTE: I found all 3 CPU’s need to be running or the board sits in a reset loop.
So, once it was booting I had graphics faults.
Only two of the tile ROM’s were ever getting selected. I traced these back to the CUSTOM chip CUS123 on the ROM board. I had no choice but to find a replacement chip.
Ended up buying a whole new ROM board that contained Pac-Mania ROM’s and had a missing OP-AMP.
Transferring all the ROM’s and the missing chip over fixed everything.
