More Bootleg Games
Moderator: Moderators
Forum rules
- For making cartridges of your Super NES games, see Reproduction.
Re: More Bootleg Games
If it means anything, I don't recall the game ever using the bitswap logic and the address muxing at the same time (the latter is only active very briefly). I'd have to double check when I'm not at work, though.
Re: More Bootleg Games
King of Fighters '98 is writing values 28,02,C1,18,... to the bitswap port. So there seem to be a separate latches for bitswap and bankswitch (with a single latch, bit7=1 (or bit1=1) would probably mistrigger the bankswitch effect during bitswap writes, and crash the game).
For the bitswap games, I thought that I had already documented & emulated them properly years ago, but just noticed that four games didn't really work in no$sns:
Pokemon Stadium is using bank 90/98 (which need to be mirrored to bank 80/88) (that's probably just normal bitswap hardware, other bitswap games just don't rely on those mirrors).
Street Fighter EX Plus Alpha uses the tekken2-style alu/flipflop protection (rather than bitswap).
A Bug's Life and Bananas de Pijamas are using a yet unknow "port 6xxx" protection (rather than bitswap).
For the "Port 6xxx" protection, the code is at 81:FF00 (bananas) and 00:CAC0 (bugslife). And it works (somehow) as so:
Note: A Bug's Life has originally used "bitswap" protection (the bitswap write/read/compare's are still there, but the conditional jumps are patched to ignore the result, and another patch was used to add the new "port 6xxx" protection). Amusingly, d4s has cracked both the port6xxx and bitswap protections in bug's life (although the bitswap was already cracked/patched in the dump from the retail cart).
For the bitswap games, I thought that I had already documented & emulated them properly years ago, but just noticed that four games didn't really work in no$sns:
Pokemon Stadium is using bank 90/98 (which need to be mirrored to bank 80/88) (that's probably just normal bitswap hardware, other bitswap games just don't rely on those mirrors).
Street Fighter EX Plus Alpha uses the tekken2-style alu/flipflop protection (rather than bitswap).
A Bug's Life and Bananas de Pijamas are using a yet unknow "port 6xxx" protection (rather than bitswap).
For the "Port 6xxx" protection, the code is at 81:FF00 (bananas) and 00:CAC0 (bugslife). And it works (somehow) as so:
Code: Select all
xx:60xx Single Write Port ;-maybe reset's something
xx:62xx Looped Write Port 1 ;\
xx:64xx Looped Write Port 2 ; maybe sums up written values somehow
xx:66xx Looped Write Port 3 ;
xx:68xx Looped Write Port 4 ;/
xx:61xx Read Port 1 ;\
xx:63xx Read Port 2 ; maybe results from above write(s)
xx:65xx Read Port 3 ; (only lower 4bit used)
xx:67xx Read Port 4 ;/
xx:6Fxx Read Port Extra ;-extra (used by A Bug's Life only)
Re: More Bootleg Games
http://imgur.com/a/nZ02m
CLE bought one of the single-board Campeonato Brasileiro 2 carts and sent me some better PCB photos.
CLE bought one of the single-board Campeonato Brasileiro 2 carts and sent me some better PCB photos.