‘Rod_Wod’ sent in dump of the unique PAL from a FixEight PCB.Original device was an unsecured PALCE16V8H, dump has been successfully tested by him onto a same device and a GAL16V8 too.Thanks again to him.
A quick repair for this Sky Kid (Namco) I received some days ago :
Board was in near mint condition but it didn’t boot sitting on a semi-static garbage screen (which was looping sign that watchdog was active)
Most of the devices were socketed so for first I ruled out the many custom ICs present, they were all working.Then I tested the RAMs out of circuit.Two Mitsubishi M58725P (2k x 8-bit static RAM) failed (at different address location)
Replaced them with compatible 6116 and board successfully booted with no further issue.Job done.
A friend got a Mahou Daisakusen (japanese version of Sorcer Striker) board with faulty graphics.
It was playing fine with sound but there was an obvious color palette problem.
I started looking at signals around the color outputs of the PCB and quickly found weak signals on the 74HCT273 at location U12. Piggybacking the chip with a working 74LS273 fixed the colors immediately.
I replaced the chip… Board fixed.
Here is a picture of the PCB with the defective chip highlighted in red:
We have some new dumps from an unusual arcade hardware called High Rate DVD, a DVD-based mahjong system released by Nichibutsu in different volumes, you can read more about here:
256KB binary dumps have been provided by ‘system11’ on Dumping Union list, I took care of reversing them to GAL16V8 targeting devices.Each PAL (identified by a colored stripe or dot on chip) is shared among more than a volume and other Mahjong games too, you will find info on database.Thanks to ‘system11 who also successfully tested dumps back on hardware.
New PAL dumps today.We have the ones from :
