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 Post subject: High Speed
PostPosted: Wed Nov 24, 2004 11:14 am 
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Joined: Tue Nov 23, 2004 9:35 pm
Posts: 647
As were are on the subject of overdumped roms, High Speed deserves some attention. The GoodNES rom has a size of 256KB. Reliable sources tell me that the game's true size is 192KB, with 128Kb or PRG and 64KB or CHR. So I decided to test the ROM. If I were to play with the header and say it only had 8x8KB pages of CHR ROM, the game still works perfectly. Looking in a hex editor only seems to suggest that everything past 192KB is garbage. So I have made a ROM with the last 64KB deleted and the game works fine. [/b]


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PostPosted: Wed Nov 24, 2004 11:24 pm 
Doesn't High Speed use an oddball board containing both 64Kb of CHR ROM and 8Kb of CHR RAM? It sounds like the dumper dumped the CHR RAM as if it were additional CHR ROM, resulting in garbage at the end of the dump.


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 Post subject:
PostPosted: Thu Nov 25, 2004 9:40 am 
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Joined: Tue Nov 23, 2004 9:35 pm
Posts: 647
Indeed it does, but his copier would have to have gotten confused as there is only 8KB of V-RAM on the cart and dumped it 8 times.


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