The new BG's didn't compress at or less than the original BG sizes, so a new compression scheme was needed. We were going to use "pucrunch" because we had got it working/ported to PC-Engine, but it's a fair amount of worked to add our own code hooks for special case BGs (as well as find an area in ram temporarily for the decompression ring buffer). I lobbied Ryphecha of Mednafen to get an extension to the original SF2 mapper. Something that's backwards compatible (there's a theory that the SF2 mapper itself supports higher than 20megabits, but the traces need to be mapped out on the original rom to find out for sure). Anyway, I couldn't get it supported in mednafen (which is the PCE emulator with a debugger). As for the real system, the mapper is super simple. It can be made with only 2-3 off shelf TTL parts/chips. SF2+ mapper would support up to 68megabits. So that put a damper on the mood of things. We did a lot of work on those BG touch ups, so I do want to put them back into the rom someday (beautiful legal PCE BGs - even converted and everything into raw PCE format).Originally Posted by PC-ENGINE HELL
Anyway, there's also Blanka's stage that was redone as well:
And Bison's (US name, Balrog is the Japanese name IIRC) stage. And I think we started on Ken's stage too.
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