diff options
Diffstat (limited to 'home/header.asm')
| -rwxr-xr-x | home/header.asm | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/home/header.asm b/home/header.asm index b1d30d02..75b43056 100755 --- a/home/header.asm +++ b/home/header.asm @@ -4,10 +4,12 @@ SECTION "rst0", ROM0[$0000] di jp Start -SECTION "rst8", ROM0[$0008] ; rst FarCall +SECTION "rst8", ROM0[$0008] +FarCall:: jp FarCall_hl -SECTION "rst10", ROM0[$0010] ; rst Bankswitch +SECTION "rst10", ROM0[$0010] +Bankswitch:: ldh [hROMBank], a ld [MBC3RomBank], a ret @@ -18,7 +20,8 @@ SECTION "rst18", ROM0[$0018] SECTION "rst20", ROM0[$0020] rst $38 -SECTION "rst28", ROM0[$0028] ; rst JumpTable +SECTION "rst28", ROM0[$0028] +JumpTable:: push de ld e, a ld d, 0 @@ -53,14 +56,15 @@ SECTION "joypad", ROM0[$0060] jp Joypad -; Game Boy cartridge header - SECTION "Header", ROM0[$0100] Start:: +; Nintendo requires all Game Boy ROMs to begin with a nop ($00) and a jp ($C3) +; to the starting address. nop jp _Start -; The cartridge header data is filled in by rgbfix. -; This makes sure it doesn't get used. - ds $0150 - $0104 +; The Game Boy cartridge header data is patched over by rgbfix. +; This makes sure it doesn't get used for anything else. + + ds $0150 - @, $00 |