JAMMArcade.net – Page 47

Night Striker and Jackie Chan PAL dumps added

PAL Updates Comments Off

Apr 022018

Today an important addition to our PLD database thanks to ‘coolmod’, one of our finest contributors.We have from him PAL dumps of :

Night Striker

This is a quite rare board, a 3D shoot ’em up developed and published by Taito for the Taito Z System in 1989.Board uses a lot of PLDs and some of them are present multiple times at different location.We have the complete PAL dump set (from PAL20L8/PAL20R8 and PLHS18P8 devices, as natrive dumps and 256KB binary respectively) and but for now only some have been reversed and successfully tested into GAL targeting device.

Jackie Chan

A 1995 fighting arcade game with renderized characters developed and published by Kaneko.Two ispLSI 2032A (PLCC44 package) PLDs dumped.Dumps are unested so for now we consider them as “assumed working” (as well as the all the other ones we had from this PCB) since devices were unsecured but we are looking for someone to test them back on PCB.

Thanks again to ‘coolmod’ for his contribution.

Cruisin USA link PAL, Commodore C16 PLS100 & Shadow Dancer PAL added

PAL Updates Comments Off

Apr 022018

Here is something a little more special than normal.
A quick google search for “Cruisin USA link PAL” shows that a few people have been searching for this for a while now. I personally bought a PCB a few years ago in an attempt to dump it only to find the link up version uses a different PAL chip.
Recently TheDrunkenArcade bought the correct PCB and gave the PAL to JROK to reverse.
Massive thanks to TheDrunkenArcade and JROK for doing this and also allowing us to add it.

Next up is the Commodore C16 PLA. I made a post showing the method I used to recreate this to allow it to be programmed to an original PLS100 device. After much testing I have uploaded the file.

Finally my good friend Banjo Guy Ollie sent me IC48 PAL chip from his Shadow Dancer bootleg. The device seems to be operational but the PCB it came from is not yet 100% so we cannot test it right now.
There is another PAL on this PCB that he will be sending my way when he can.
Thanks to Ollie for this

The “Little Fab Four” : Konami ‘007234’ & ‘005273/005273A’, Taito ’48CR-1′, Technos ‘TRJ-001’ reproduction

Reproductions 1 Response »

Mar 232018

They are little but not for this less important so for joke we will call them the “Little Fab Four”.They are four small custom components we often see on our beloved arcade PCBs, this post is about the reproductions I made of them.

Konami ‘007324’

This is a part we can find on Lethal Enforcers PCB (and maybe other but I never encountered it), as schematics show it’s used to interface data busses of the 63C09E main CPU and its program ROM:

Techically speaking it’s a simple resistor pack.Here’s its reproduction

Testing the repro on its own PCB:

Konami ‘005273/005273A’ – Taito ’48CR-1′ – Technos ‘TRJ-001’

I put these three together since they have the same function, design and SIL package.They are 10 pin resistors/capacitors array used for inputs.The bigger resistors (from 1K to 10K Ohm) are used as pull-up of the inputs from edge connector, the smaller ones (10o-200 Ohm) to route the signal to the remaining inputs circuit (which could be simple logics or ASIC).Lastly the capacitors (ceramic, 100-300 nF) are for filtering possible disturbs.

Here are the repro and their installation:

Testing on different PCBs:

Good things come in small packages!

See you all to my next reproduction project.

Dogyuun repair log #2

General, PCB Repair Logs Comments Off

Mar 212018

Got from Portugal another Dogyuun PCB (after the one of some months ago), this was declared as ‘dead’ by the owner :

And it was so.All I got was a steady black screen, no activity on board, no clock on 68000 main CPU.I checked voltages on edge connector and there was no +5V so the board was actually not powered :

A quick inspection revealed corrosion on edge connector:

Once cleaned it the board booted and played fine but sound samples were muffled and some static noise was present :

Some sign of electrolytic capacitor leaking was present on sound section :

I fired up my ESR meter and started measuring capacitors.A couple of them, the 220uF 16V @C7 and the 10uF 16V @C9, gave no reading so out of range of my meter (0-99 Ohm)

I replaced them, this restored clear sound.No other issue were found so board 100% fixed.

Teenage Mutant Hero Turtles repair log #5 and Konami ‘007340’ reproduction

PCB Repair Logs, Reproductions Comments Off

Mar 182018

Got in a trade this untested Teenage Mutant Hero Turtles PCB:

At first test the board turned out to be faulty.Sprites were scrambled and some sound samples scratchy:

I launched a MASK ROM test which reported as bad all four 4Mbit devices storing sprites data:

Obviously the result didn’t mean the MASK ROMs were all bad, this was quite unlikely but for sure there was a problem in the sprites generation circuit.

Most of the circuit is condensed in two ASICs, the ‘051960’ which generates the address for the MASK ROMs and the ‘051937’ which reads their data:

Judging from type of fault, the ‘051960’ was generating wrong address, you can see its implementation in this snippet of schematics :

Also scope analyzing confirmed my suspicions :

This lead me to remove and replace the ASIC:

This restored sprites so the IC was really bad (it’s not the first time, see my past repair log of Block Hole)

Now the sound issue.A quick visual inspection revealed that one of the two components marked ‘007340’ was cracked in two:

As schematics suggest the ‘007340’ is a resistor ladder (R2R) used to convert into analog the digital bits outputted from the ‘007232’ PCM controller so I made a very rough replacement that worked fine:

Later I properly reproduced it :

Another PCB fixed and another (little) custom reproduced.

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