Empty program: Difference between revisions
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Puppydrum64 (talk | contribs) m (Clarification) |
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===Game Boy Advance=== |
===Game Boy Advance=== |
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The Nintendo logo is loaded from the cartridge, and the Game Boy Advance's firmware won't boot the game without it. So an empty program can't be run at all. Thus a minimum of a valid cartridge header is required for an empty program that the Game Boy Advance can actually run. |
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At the beginning of the cartridge header is the instruction to branch to the main program. |
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The first four bytes of the cartridge header are an unconditional branch instruction to the program's start. Simply duplicate this instruction at that address and voila: |
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The cartridge header won't be reproduced here, but the label name you have in the first line of the header needs to match the entry point of your main program. |
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<lang ARM_Assembly>ProgramStart: |
<lang ARM_Assembly>ProgramStart: |
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