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authorPikalaxALT <pikalaxalt@gmail.com>2021-07-22 15:56:24 -0400
committerhuderlem <huderlem@gmail.com>2021-07-23 09:32:38 -0500
commita1ad5cb2d9e463fa2b77d2fc4a7b995a4f7ed5e2 (patch)
tree60db8b836e6112286714979500f359091f61784d /asm/start.s
parent3a4437a42d67ea0ea606e5f0a751b61a32881d8e (diff)
through sub_2768
Diffstat (limited to 'asm/start.s')
-rwxr-xr-xasm/start.s112
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