Caius

New PAL dumps added

PAL Updates Comments Off

Dec 022015

Today I dumped a couple of new PALs.The first comes from a Sega Puyo Puyo board.This PAL should be unique to this game while the other two PALs on board (already dumped and on database) should be shared among all Sega C/C2 boards.Original device was a secured GAL16V8A.

The second dump was obtained from a CK2605 of a Chequered Flag PCB, then I successfully converted the fusemap to a GAL18V10 targeting device (first reading device as PLS153 and reducing its equations to a CK2605 fusemap using the Charles MacDonald PLA utility).You can find both dumps on our database as usual.

Chequered Flag double repair log

PCB Repair Logs Comments Off

Nov 302015

I got a couple of Chequered Flag PCBs for a repair.Here’s the first:

The MASK ROM test reported an error on a character ROM at a certain location:

which caused some garbage on screen:

Launching MAME I could figure out the ROM reported as bad was the one @N16:

Device itself was a non 32 pin non-JEDEC 27C1000 mounted on a custom socket in place of the classic 1Mbit 28 pin MASK ROM.So I read it and it matched the one on MAME sets.Probing it I found that its pin 28 (A13) was silent,I traced it back to the a near custom marked ‘051316’ that addresses the entire character ROM :

A dead address line means that the IC has an internal fault so my only option was to replace it and this is what I did taking it from another dead board:

With a good custom the MASK ROMs test successfully passed and all GFX issues vanished:

The second PCB :

had slight sprites issue.Here’s a comparison with a MAME snapshot (on the left):

A visual inspection of the board revealed some lifted pins of the two ASICs sprites generators:

A reflow was enough to restore correct sprites:

End of (double) job.

The Outfoxies repair log

PCB Repair Logs Comments Off

Nov 272015

I got this mint The Outfoxies PCB for a repair from my friend Zoran :

For the uninitiated it’s a fighting game released by Namco in 1994 on Namco NB-2 hardware.The board ran well but had some inputs issue regarding the player one.Down input was not responding while left one was intermittent.This was confirmed also by switch test :

Also in this Namco hardware (like the NA-1/NA-2 and NB-1 ones) the inputs signals from JAMMA pass for first through some SMD EMI filters (which suppress high frequency interferences).Using a multimeter revealed that JAMMA pin 19 and 20 parts side had continuity with the inputs of the EMI filter @FL12 but the outputs lost their connection with the pads:

Restablishing the lost connection with a bit of AWG30 wire fixed the issue completely:

Volfied PAL dumps verified and converted

PAL Updates Comments Off

Nov 272015

Today I could successfully verify and convert (using the PALTOGAL utility) into GAL16V8 the Volfied PAL dumps submitted some time ago by Andreas.I added proper labelling as well.So my .JED are going to replace his original PAL16L8 dumps.

Rolling Thunder custom ‘130’ replacement board PAL dumps added

PAL Updates Comments Off

Nov 232015

Yesterday I dumped and successfully reversed into GAL16V8 the two secured PAL16L8 present on a piggyback board that replaces the custom ‘130’ on an original Namco Rolling Thunder PCB.Picture of the replacement board has been uploaded to the database as well.

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