NES mappers - what have I done wrong?

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04-26-24 09:23 AM

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Main - ROM Hacking - NES mappers - what have I done wrong?

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Treeki

Posted on 12-03-07 01:23 AM

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From: Rogueport

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I decided I wanted to try to learn to ASM hack NES games, so I downloaded the SMB1 disassembly off romhacking.net and got it working with the compiler it suggested (x816).
I don't have any previous ASM hacking knowledge (other than a very basic understanding of assembly, registers, etc) so I just tried to study it a lot and change things.
So far, I managed to remove the 2 player game selection (first edit I did), add different tiles for the top and middle ground (something I have always wanted in SMB) and add animation using CNROM. However- the ROM does not start in FCEU. FCEU XD and Nestopia run it fine. Does anyone know why?
Here is the IPS patch for my ROM, if it helps:
http://www.sendspace.com/file/oveiqx

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frantik

Posted on 12-03-07 04:38 AM

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did you put the proper header on it?

i dont know what the proper one is myself so i cant check for you

Treeki

Posted on 12-03-07 11:40 AM

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From: Rogueport

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Yeah.. although I already figured out the problem.
Adding code to set the VRAM page to 0 right at the start of the game stopped it freezing. Thanks anyway.

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Main - ROM Hacking - NES mappers - what have I done wrong?

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