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.section .init
.global _start
.align
.arm
_start:
b start_vector
.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)
start_vector:
mov r0, #0x4000000 // REG_BASE
str r0, [r0, #0x208]
mov r0, #0x12 // Switch to IRQ Mode
msr cpsr, r0
ldr sp, =__sp_irq // Set IRQ stack
mov r0, #0x1f // Switch to System Mode
msr cpsr, r0
ldr sp, =__sp_usr // Set user stack
// Jump to user code (switching to Thumb mode)
ldr r3, =main
bx r3
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