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name the game (early 80s, spcinvaders hardware)
01/02/11 07:05 PM
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This ROMset has been floating around as "mr_unknown.zip", and later labeled as "unknown Model Racing game" (I doubt it's by Model Racing though). Sorry, I can't share the ROMset.
The set is missing vital parts: a section at the $4000 region, and 1KB at $0000-$03ff (game start, and irq handler resides there, so game doesn't work at all, damn). I've been studying it a bit, but can't figure out what game it is. If we can know with certainty which game it is, it could be added to MAME. It would be a shame to not share what I know.
Facts and near-facts: - from ROM disasm: nearly certain that the CPU is i8080 - from ROM disasm: * $0000-$1fff is ROM * $2000-$23ff is user RAM * $2400-$3fff is video RAM * $4000-$???? is ROM * $a400-$???? is color RAM * I/O ports 0-3 are used for input and sound (I couldn't find proof that it uses a shift register, but it probably does) - ROM has "NICHBUTSU" in it (yeah, typo) - above statements make it near-certain that the game is running on Rolling Crash hardware (rollingc in MAME) - after hacking and slashing with the MAME debugger and running the game as 'rollingc', I managed it to show something (no game action though =/).. the most interesting ones: * http://crap.tsk-tsk.net/mr_unknown_h1.png * http://crap.tsk-tsk.net/mr_unknown_h2.png * http://crap.tsk-tsk.net/mr_unknown_h3.png - last but not least, ROM as 1-bit picture (shuffled and rotated and whatnot, so I hope it's not against the rules :P .. about as legal as CPS2 xors): http://crap.tsk-tsk.net/mr_unknown_gfx.png
I was hoping it's Moon Raker, but I don't think it is.
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