.section ".init" .global _start .align .arm @--------------------------------------------------------------------------------- _start: @--------------------------------------------------------------------------------- b rom_header_end .fill 156,1,0 @ Nintendo Logo Character Data (8000004h) .fill 16,1,0 @ Game Title .byte 0x30,0x31 @ Maker Code (80000B0h) .byte 0x96 @ Fixed Value (80000B2h) .byte 0x00 @ Main Unit Code (80000B3h) .byte 0x00 @ Device Type (80000B4h) .fill 7,1,0 @ unused .byte 0x00 @ Software Version No (80000BCh) .byte 0xf0 @ Complement Check (80000BDh) .byte 0x00,0x00 @ Checksum (80000BEh) @--------------------------------------------------------------------------------- rom_header_end: @--------------------------------------------------------------------------------- b start_vector @ This branch must be here for proper @ positioning of the following header. .GLOBAL __boot_method, __slave_number @--------------------------------------------------------------------------------- __boot_method: @--------------------------------------------------------------------------------- .byte 0 @ boot method (0=ROM boot, 3=Multiplay boot) @--------------------------------------------------------------------------------- __slave_number: @--------------------------------------------------------------------------------- .byte 0 @ slave # (1=slave#1, 2=slave#2, 3=slave#3) .byte 0 @ reserved .byte 0 @ reserved .word 0 @ reserved .word 0 @ reserved .word 0 @ reserved .word 0 @ reserved .word 0 @ reserved .word 0 @ reserved .fill 4096,1,0 @ 4kb of filler so no useful code gets overwritten when flash bytes get copied over the top. .global start_vector .align @--------------------------------------------------------------------------------- start_vector: @--------------------------------------------------------------------------------- @--------------------------------------------------------------------------------- @ Enter Thumb mode @--------------------------------------------------------------------------------- add r0, pc, #1 bx r0 .thumb @ Turn off sound ldr r1, =0x4000084 eor r0, r0, r0 strh r0, [r1] @--------------------------------------------------------------------------------- @ set heap end @--------------------------------------------------------------------------------- ldr r1, =fake_heap_end ldr r0, =__eheap_end str r0, [r1] @--------------------------------------------------------------------------------- @ global constructors @--------------------------------------------------------------------------------- ldr r3, =__libc_init_array push {lr} bl _blx_r3_stub @--------------------------------------------------------------------------------- @ Jump to user code @--------------------------------------------------------------------------------- mov r0, #0 @ int argc mov r1, #0 @ char *argv[] ldr r3, =main bl _blx_r3_stub @; If we're here, turn the sound back on before we return ldr r1, =0x4000084 mov r0, #0x8F strh r0, [r1] pop {pc} @--------------------------------------------------------------------------------- _blx_r3_stub: @--------------------------------------------------------------------------------- bx r3 .align .pool .end