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!