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There's a 4-pin jumper that's used to select Mono or Stereo sound on Konami's Salamander and Life Force boards (for example) - it plugs into CN2 (stereo) or CN3 (mono) - how is the jumper wired? I have a Salamander with a missing jumper. I've been looking online for a board pic that shows the...

Rabbit Punch / Rabio Lepus from V-System has a 3.6V NiCad battery, does anyone know what it's used for?

Jaleco Saturn - a very uncommon game, I have one here and am trying to figure out the wiring to the two Output Enable pins on the two EPROMs which sit on a small daughterboard. Does anyone happen to have one of these boardsets and could take photos of it please? Or are there any schematics...

Is it supposed to be possible to go into test mode when using the Gauntlet 'No Slapstic' hack? I've successfully implemented the hack and the game runs fine but of course a ROM error is displayed on power up due to the different checksum of the replaced EPROM. However, this error also seems to...

I need to replace a volume pot on a Sega Mega Play yet I've not encountered a pot like this before (seven pins including the two mounting lugs). Does anyone have any details on it please, maybe where to get a replacement?

There are three pairs of RAMs on a CPS2 A board (details as per the markings on the PCB): M5M5178P-45 (at 4D and 5D) HM658128ADFP-10 (13R and 14R) HM514260LJP-y (13V and 14V) and a solitary CXK5864CM-10LL (2K) Presumably one is work RAM, one is sound RAM one is graphics RAM, etc? Which is...

I currently have a Sega Hang On Jr (System E hardware) wired up to a JAMMA adapter. All inputs work if I plug in another ROM board (or EPROMs) from another System E game, including the Start button. However, when the Hang On Jr ROM board or EPROMs are used (note: they're fine) I can coin up...

I'm getting the following error on a Gauntlet board: RAM at 38000 U L 7E27 Despite the error it appears to play okay with no graphics errors (as of yet). Does anyone know which RAM the error may be referring to?

I'm currently trying to write kinst2.chd to a Compact Flash card. I'm using version 0.181 of chdman and the command I'm typing in is: chdman extracthd -i kinst2.chd -o \\.\PHYSICALDRIVE3 -f (my Compact Flash card is on physical drive 3). However, I get the following error: Unable to open...

Is it possible to convert a Namco System 2 board from one game to another via a simple ROM/EPROM swap?

Does anyone know what other boards use this 64-pin surface mounted chip? It seems to be a fairly common point of failure on Namco System 1 boardsets. Thanks

Capcom CPS2 'B' boards - which custom handles the sprites? I have a CPS2 'B' board with horizontal lines through the sprites. Initially this looked like a mask ROM/socket/bad track/lifted or shorted pin on a custom issue but all of those are fine. This points to a bad custom chip, but which of...

Space Invaders Part II, 3 layer boardset. On power up it draws the Space Invaders Part II title screen graphics/text, then resets. I'm convinced that it's a simple fix yet the fix itself currently escapes me. Something to do with the Bit Shifter circuit perhaps? I've fixed this issue before but...

Designing the Centaur pinball replacement echo card Thought this video would interest some people: https://www.youtube.com/watch?v=CUZi39BYPFA Big Clive (Clive Mitchell) designed this replacement echo card some years ago (it's been available to buy for some time with his full approval, link...

Does anyone know how to get Promlink working under Windows 7 64-bit? When I start Promlink it errors and states that it's not compatible with the version of windows that I'm running. I've tried compatibility mode with no luck. Thanks

Capcom's CPS-A-01 custom chip - anyone looked into making a replacement? As we know, the CPS-A-01 chip on CPS1 A boards has a high failure rate, rendering CPS1 A boards useless. Besides taking the same part from another A board (a pointless exercise unless it's a parts board) the only other...

How is Namco's Tank Battalion board set to cocktail/tabletop mode? The manual has no info that I can see, or the wiring diagram, or the schematics. Any ideas please?

Programming PROMs - alternatives to the Data I/O 29B? I have a Data I/O 29B and Unipak 2B which sees very occasional use for programming PROMs such as the 82S129, 82S131, etc, etc, etc. Is there any relatively modern (and cheap?) programmer which will do the same job? I ask as the Data I/O is...

Does anyone happen to know the pinout of the custom chip on the Capcom CPS1 'C board' please? Specifically I'm curious what pin 1 does. I guess all of the various custom chips use the same pinout? Thanks

Neoloch Inquisitor RAM, PIA, RIOT tester - 3D printed case As a new Neoloch Inquisitor owner (excellent bit of equipment) I thought some other owners may be interested to know that a 3D printed case design is available. Note: I didn't produce this! The link was provided to me by David Hoffman...