diff options
author | PikalaxALT <pikalaxalt@gmail.com> | 2021-07-22 15:56:24 -0400 |
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committer | huderlem <huderlem@gmail.com> | 2021-07-23 09:32:38 -0500 |
commit | a1ad5cb2d9e463fa2b77d2fc4a7b995a4f7ed5e2 (patch) | |
tree | 60db8b836e6112286714979500f359091f61784d /asm/start.s | |
parent | 3a4437a42d67ea0ea606e5f0a751b61a32881d8e (diff) |
through sub_2768
Diffstat (limited to 'asm/start.s')
-rwxr-xr-x | asm/start.s | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/asm/start.s b/asm/start.s deleted file mode 100755 index ab124f4..0000000 --- a/asm/start.s +++ /dev/null @@ -1,112 +0,0 @@ - .include "constants/gba_constants.inc" - - .syntax unified - .arm - -Start: @ 8000000 - b Init - -.incbin "baserom.gba", 0x4, 0xBC - - .arm - .align 2 -Init: @ 80000C0 - mov r0, #0x12 - msr cpsr_cf, r0 - ldr sp, sp_irq - mov r0, #0x1F - msr cpsr_cf, r0 - ldr sp, sp_sys - ldr r1, =INTR_VECTOR - adr r0, IntrMain - str r0, [r1] - ldr r1, =0x800095C + 1 - mov lr, pc - bx r1 - b Init -sp_sys: .4byte IWRAM_END - 0x100 -sp_irq: .4byte IWRAM_END - 0x60 - .pool - - .global IntrMain -IntrMain: @ 8000104 - mov r3, REG_BASE - add r3, r3, OFFSET_REG_IE - ldr r2, [r3] - ldrh r1, [r3, OFFSET_REG_IME - OFFSET_REG_IE] - mrs r0, spsr - stmdb sp!, {r0-r3,lr} - mov r0, 1 - strh r0, [r3, OFFSET_REG_IME - OFFSET_REG_IE] - and r1, r2, r2, lsr 16 - mov r12, 0 - ands r0, r1, INTR_FLAG_SERIAL - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_TIMER3 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_VBLANK - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_HBLANK - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_VCOUNT - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_TIMER0 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_TIMER1 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_TIMER2 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_DMA0 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_DMA1 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_DMA2 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_DMA3 - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_KEYPAD - bne IntrMain_FoundIntr - add r12, r12, 4 - ands r0, r1, INTR_FLAG_GAMEPAK - strbne r0, [r3, OFFSET_REG_SOUNDCNT_X - OFFSET_REG_IE] - bne . @ spin -IntrMain_FoundIntr: @ 80001D4 - strh r0, [r3, OFFSET_REG_IF - OFFSET_REG_IE] - mov r1, INTR_FLAG_GAMEPAK | INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL - bic r2, r2, r0 - and r1, r1, r2 - strh r1, [r3] - mrs r3, cpsr - bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK - orr r3, r3, PSR_SYS_MODE - msr cpsr_cf, r3 - ldr r1, =gIntrTable - add r1, r1, r12 - ldr r0, [r1] - stmdb sp!, {lr} - adr lr, IntrMain_RetAddr - bx r0 -IntrMain_RetAddr: @ 8000210 - ldmfd sp!, {lr} - mrs r3, cpsr - bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK - orr r3, r3, PSR_I_BIT | PSR_IRQ_MODE - msr cpsr_cf, r3 - ldmfd sp!, {r0-r3,lr} - strh r2, [r3] - strh r1, [r3, OFFSET_REG_IME - OFFSET_REG_IE] - msr spsr_cf, r0 - bx lr - .pool |