Double Dragon finally!

I've been after a Double Dragon JAMMA PCB for ages, but I've not gone out of my way to find one, it has however taken along time for one to appear. Anyway, a recent batch of PCBs came in, and there was a sorry dusty looking PCB with missing legs and problems booting up. I saw that very briefly on booting up I saw a 'ROM 3 error', this turned out to be IC26.
The ROM was labelled differently to what is in Mame, but sadly it gave inconsistent reads, which caused the game to crash soon after reaching the title screen :| Its possible this is some sort of 'European' version, that's a total guess here because it has an 'E' on it... its labelled 21A-2 (with a '3' in biro on the label so '21a-2-3.25' for Mame) - interestingly, this actually romidents as 21j-2-3.25.
Anyhow, I finally found the 'world' revision ROM that corresponded to my set (21J-1-5.26), plugged it in and it fired up and it was fine, no errors! I haven't owned a proper Double Dragon PCB for at least 10 years so I'm keeping this one!

Konami Track n Field JAMMA Adapter

Well, I hate buidling JAMMA adapters, but i have come up with a method that makes it much more painless... I keep getting asked for them on my webstore so i decided to make a couple for stock. The key is to use the JB-3 fingerbaords available at jammaboards.com. The key is, always solder your smaller connector to the same position, and write up a wiring list for an adapter where you translate the JAMMA thru-hole designations to the 36-way connector designations. In this way you aren't constantly referring to several pinout sheets and flipping back and forth checking all the time, thats where most of the time goes! I can now make a plain Konami, or a track n field adapter in about half an hour now, much better!

Konami Hyper Olympic '84 Revision D found?

While working through my pile of Hyper Olympic '84 pcbs today i realised that the rom arrangement is different to Mame... whether the code is different or not i don't know, i'll leave that to the mame guys to figure out. All the roms are noted with a 'D' instead of mame which shows 'C'. Konami were fond of duplicating 99% of the roms across sets, but changing all of the naming. After tracking a bunch of tough problems and replacing way too many chips that didn't fix the fault, the pcb was 99% there... there were just a few bits of garbage left on the pummel horse round in the game character... turned out to be a bad rom at J19! all fixed.