JAMMArcade.net – Page 52

PAL dumps update

PAL Updates Comments Off

Feb 042018

Today we have some new PAL dumps.

‘coolmod’, one of our finest contributors, sent in different dumps, all are untested since they come from not working PCBs.We had from him dumps from these boards:

Gals Panic 3.Devices were two PLDs in PLCC44 package : a ispLSI 1016 and a ispLSI 2032.
Namco System 11.One PLD dumped from motherboard.
Namco System 2.One PLD marked “SYS87B-2B” dumped from a CPU board of a Golly Ghost! boardset.This has slighly different equations than usual one marked “SYS87B-2” we had on database.
Quick Pick 5 , a slots game by Konami.Two secured PALs here, I reversed them into GAL16V8 fusemap.Picture of board:

VJ Dash1.2, a music game from Jaleco.Dumped one unsecured Xilinx XC7336 (PLCC44) PLD and one secured PEEL18CV8 (reversed by me into GAL16V8).Picture of board:

Artemio Urbina sent in dumps (from seven devices) from a Thunder Zone PCB, according to him these are specific to the Japanese ROM set so they may not work on other versions

‘chaneman’ sent in dump of a 82S153 device found on a Pengo bootleg board.He also send info on how to run on this board an unencrypted version of original Sega game code, you will find notes on database.

The user ‘undamned’ from Arcade-Projects forums dumped the PAL marked ‘D77-20’ from the Taito F3 cartridge ‘Kirameki Star Road’, device was an unsecured PALCE16V8 @IC37:

Lastly, I converted to GAL16V8 a BPROM found on a Black Tiger/Black Dragon PCB.Dump of the BPROM (a Fujitsu MB7114 marked ‘BD03’ @11K) was taken from MAME ROM set.GAL conversion was successfully tested by the Arcade-Projects user “rewrite” on his board which was missing this chip.

Thanks to all contributors.

Silent Scope Fortune Hunter DS2430 replacements

General Comments Off

Jan 272018

I now have a way of creating new DS2430 replacements for a Konami Viper Silent Scope Fortune Hunter game.
I can only do Silent Scope FH at the moment but I might expand to other titles in the future if I get hold of the hardware.
The DS2430 has a unique factory lasered registration number which is used as part of the security of these things. As long as there is a good Timekeeper NVRAM fitted then the game will reinitialise it on this game and it does not seem to play a part in the security.

If anyone needs a replacement then get in touch and we can sort something out. I will need the ROM ID from a new DS2430 in order to make a new file.

Seibu ‘UEC-51’ reproduction

Reproductions 4 Responses »

Jan 252018

At first glance the Seibu ‘UEC-51’ (also found marked as ‘HB-5’ or ‘UEC-05’) looks very similar to its successor ‘UEC-52’ :

Both are RGB DAC in SIL package used on some Seibu/TAD Corporation PCBs.But, pin number apart (20 for the UEC-51, 22 for the UEC-52) they have different design.This reproduction project started while I was repairing a Toki PCB which had some video issue that I pinpointed in this custom (althouhg later I found the issue was due another fault).As said, the ‘UEC-51’ acts as digital-to-analog converter of the color palette data (12 bit in total so four for each color) but, compared to the other DACs (like the Taito ‘TC0070RGB’), data are not latched but buffered.Obviously also here three R2R (resitor ladder) circuits are used in final stage to perform the analog conversion.As always in my projects, for first I figured out parts and design adopted, in this case I didn’t remove all the coating but simply exposed pins of the two ICs:

Then I carried on my test on some protoyping breadboard:

Test was successful so I drawn schematics and route them to a PCB layout trying to keep same dimensions of original part.This is the final result of a populated PCB (note the use of CMOS logics on it)

Definitive testing of the repro was done on a Toki PCB:

For reference, it seems the ‘UEC-51’ can be found on these PCBs :

Toki
Dynamite Duke

As ‘HB-5’ on :

Air Raid/Cross Shooter
Dead Angle

As ‘HB-5’ on or ‘UEC-05’ :

Cabal

See you all to my next reproduction project!

Cadash repair log #2

PCB Repair Logs 2 Responses »

Jan 242018

Received from Spain this Cadash PCB (it turned out to be an undumped Spanish version)

Board was stuck on a garbage screen :

A clicking sound suggested that the watchdog circuit was active, infact both /HALT and /RESET lines of 68000 main CPU were going LOW and HIGH in an endless loop.At first glance I thouhgt the Taito custom ‘TC00220IOC’ (responsible of generating the master reset for whole system) was faulty since this is a very prone to failure part :

But I was wrong since I replaced it with no changes.Probing the 68000 CPU I found that data line D0 (pin 5) was stuck low, using a multimeter revealed it was shorted to ground:

Looking at solderside I traced the pin back also to pin 25 of a Fujitsu MB8422 Dual-Port SRAM (part of linking mode circuit)

I cut the trace and the short was cleared (so the I/O pin of the MB8422 was internally shorted).Finally board booted into game:

But I noticed two problems : the buttons of the Player 1 were not responding and sound had rustles, you can hear it from this video :

As for first issue, using a logic probe revealed the relevant pins of JAMMA edge connector were stuck LOW :

Inputs of an arcade board must be HIGH when not activated, they are usually pulled in this state by resistors.Indeed, tracing back the pins of the three P1 buttons from JAMMA connector lead me to some custom resistor network:

The array @RRC1 was the one involved so I removed and replaced it, this fixed the controls issue.As for sound, using an audio probe I figured out that the bad audio was coming out from the TL074 OP-AMP from Texas Instruments (which are really prone to failure, have replaced tons of them)

Replacing it restored a crisp sound.End of job

Kuri Kinton repair log

PCB Repair Logs Comments Off

Jan 202018

Received from Austria this faulty Kuri Kinton PCB, an obscure fighting game manufactured by Taito in 1988 :

Board is very compact, hardware platform is called ” Taito L system” based on the the ‘TC0090LVC’ (a custom Z80), an all-in-one CPU/system controller which does everything (game logic, tile handling, sprite handling, I/O handling, etc).At power up I was greeted by this scenario:

The game played almost blind, you could coin up but graphics were all scrambled.Ruled out the two GFX 4Mbit MASK ROMs, very few was left to probe.There are four 62256 SRAMs (32K x 8-bit) whose data/address busses are tied to the ‘TC0090LVC’ :

Probing them revealed unhealthy signals on data lines of some of them:

I decided to remove them all :

Actually only the ones @IC9 and IC10 failed the out-of-circuit testing:

Replacing them fixed board completely.End of job.

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