Just a quick note.
The PLD Archive has now been split into two, A-M & N-Z.
This needed to be done as the table was becoming slow and unresponsive for us when we are updating it and we were fearful of a database crash.
Nothing else has changed and all the entries should still be present but you will need to select the table you want to see from the page.
Thanks
Got this PCB as usual from Ebay as faulty, seller said it was missing some sounds.PCB was in a clean state:
Once powered up, actually, all sound FXs were present but music was missing at all.Sound hardware is formed by a Z80 CPU which controls a YM2203 FM synthesis IC coupled with a YM3014B DAC and all sound (music+ FX) are pre-amplified by a NEC uPC4556C OP-AMP before going to the main MB3735 amplifier.Connecting the analog output (pin2) of the YM3014B to an external amplifier I could hear the music, this was still present on the OP-AMP input (pin5) but not on the output (pin7).So, I desoldered it and tested it in my chinese tester which reported it as good.But this did not convince me so I replaced it with an equivalent Mitsubishi M5218 and this was the winning move since music was fully restored.
End of job, see you next repair!
Today I dumped and tested all the PAL chips from a Space Gun PCB.
These are all in MAME already but I dumped them from strykr’s PCB.
Tired of all the (bad engineered) Pang bootlegs I have had in the past, I bought this mint not working original one:
As you know Pang is one of the CAPCOM Pre-CPS games that use a battery to supply power to a RAM that holds a decryption table. This table is the key to decrypting the encrypted program stored in the board’s ROMs.When the battery runs out, this table goes away and the program code can no longer be decrypted so the board stops working.And, since the board is manifactured in 1989 and mid lifespan of a battery is 3-4 years, nowadays most of the Pang boards suffer from this issue.
Powered up my board, I got this static brown screen, clear symptom that also my board ‘suicided’:
For some years it’s possible to revive this (and others) board thanks to the work of Tim from Arcadecollecting.Infact I followed the instructions on his site (keep only attention to use the proper ROM set specific for your game revision):
https://www.arcadecollecting.com/dead/pre-cps.html
and I could add a full working original Pang PCB to my collection:
Today I ‘desuicided’ an original CAPCOM Pang (World revision) PCB and I took the opportunity to dump the only PAL present.Device was originally a PAL16L8 marked ‘POKER’ (go figure why…).Dump is tested and working in a GAL16V8 targeting device.