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PAL dumps update

PAL Updates Comments Off

Mar 162016

Today we have some new PAL dumps.

In the past days ‘coolmod’ posted on Dumping Union list dumps of PALs from a Ray Force (single layer PCB version) ,they were obtained from two PALCE (and tested on same devices) and a PAL16L8 (then converted and tested in GAL16V8 format).

Joachim Puster sent me dump from a The End PCB.Device was a PAL14H4, I converted it to GAL16V8 and he succesfullly tested it on board.He sent also dumps from a Gunlock PCB (ROM board PCB version), they are in native PAL format (two PAL16L8 and one PAL20V8H).

Thanks to both for these contributions.

As for me, I dumped the two PALs from a bootleg of Legend of Hero Tonma.

Teenage Mutant Ninja Turtles – Turtles in Time repair log #2

Mar 122016

Easy job: the game soon after POST coined up immediately.

Ran the I/O test and the coin button didn’t work (but it showed a 0 instead of 1).

Testing pin 16 of Jamma connector (coin input) showed that it was stuck low all the time.

Tracing back with the multimeter I found out that the responsible for coin inputs was a 74ls257 TTL @19C which I replaced.

That fixed the problem.

TMNT

Superman repair log #2

PCB Repair Logs, Repair Logs Comments Off

Mar 122016

Game booted and could be played but all the screen was full of garbage and flashing.

I found one of the two rams circled in red that was really hot. Data signals were weak so I decided the replace it.

I could now see some parts of the background, so I decided to replace also the other ram and the game this time was fully restored.

Superman

Poker Ladies repair log #2

PCB Repair Logs, Repair Logs Comments Off

Mar 062016

After receiving news that Eduardo Cruz had updated the code of the Kabuki Desuicider to support also the final games with eeproms that in the past didn’t work (Super Pang and Poker Ladies), I took my Poker Ladies board to desuicide it.

After reprogramming the Kabuki chip

Foto 05-03-16 12 31 01

I fired up the game but I was welcomed with a bad surprise:

Foto 05-03-16 11 22 27

I had corrupted graphic on some sprites ( title sprite and back side of the cards).

Luckily after locating the 2 chips responsible for the sprites, one of them ( @2J )had internal damage (programmer warned about missing contact on a data line)

The chip was a 1mbit maskrom but 32pin, that means I could do a 1 to 1 change with a programmed 27c1000 or equivalent without any flying wires.

Foto 05-03-16 13 07 54

Problem was 100% fixed

Foto 05-03-16 13 08 25

Centipede repair log

PCB Repair Logs, Repair Logs Comments Off

Mar 062016

After 6-7 years years I decided to dig up my Centipede board (already repaired several times in the beginning) to make a play and I noticed that it was too quite.

Some sounds were present but something was missing…

After firing up Mame I immediately noticed that the sound missing was the centpede one!

After a brief looking at the schematic I understood that the Pokey chip was somewhat faulty.

Started the tone test and the channel 4 was silent.

Luckily I had a Missile Command lying around which was in very bad conditions but the Pokey was good!

So sound fully restored changing the Pokey chip @C3

centipede

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