first commit
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sceptillion
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.include "constants/gba_constants.inc"
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.syntax unified
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.global Start
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.text
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.arm
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Start: @ 8000000
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b Init
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.include "asm/rom_header.inc"
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@ 80000C0
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.word 0
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.global GPIOPortData
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GPIOPortData: @ 80000C4
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.hword 0
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.global GPIOPortDirection
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GPIOPortDirection: @ 80000C6
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.hword 0
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.global GPIOPortReadEnable
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GPIOPortReadEnable: @ 80000C8
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.hword 0
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.space 6
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@ 80000D0
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@ TODO: figure out what this data is
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 0xFFFFFFFF
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.4byte 4
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.4byte 2
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.ascii "pokemon red version"
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.space 13
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.4byte 0x82350AC @ gMonFrontPicTable
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.4byte 0x823654C @ gMonBackPicTable
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.4byte 0x823730C @ gMonPaletteTable
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.4byte 0x82380CC @ gMonShinyPaletteTable
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.4byte 0x83D37A0 @ gMonIconTable
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.4byte 0x83D3E80 @ gMonIconPaletteIndices
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.4byte 0x83D4038 @ gMonIconPaletteTable
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.4byte 0x8245EE0 @ gSpeciesNames
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.4byte 0x8247094 @ gMoveNames
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.4byte 0x84556F8 @ gDecorations
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.4byte 0xEE0
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.4byte 0x1000
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.4byte 0x18
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.4byte 0x5F8
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.4byte 0x3A18
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.4byte 0x3C
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.4byte 0x838
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.4byte 0x839
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.4byte 0x182
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.4byte 0xA0A0A07
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.4byte 0xC060C0C
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.4byte 0xC121006
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.4byte 0x8010B0F
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.4byte 0xC
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.4byte 0xF24
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.4byte 0x3D68
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.4byte 0x34
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.4byte 0x38
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.4byte 9
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.4byte 0xA
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.4byte 0
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.4byte 8
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.4byte 0xAD
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.4byte 0xAD
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.4byte 0x30BB
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.4byte 0x30A7
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.4byte 0
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.4byte 0x8254784
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.4byte 0x824FC40
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.4byte 0x824FB08
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.4byte 0x83DB028
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.4byte 0x8250C04
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.4byte 0x826056C
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.4byte 0x82605CC
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.4byte 0xA8
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.4byte 0x82C
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.4byte 0x83B
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.4byte 0x3A0D1E2A
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.4byte 0x1E2B
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.4byte 0x298
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.4byte 0x309C
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.4byte 0x30EC
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.4byte 0x34
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.4byte 0
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.4byte 0xFFFFFFFF
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.arm
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.align 2, 0
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.global Init
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Init:
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mov r0, PSR_IRQ_MODE
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msr cpsr_cf, r0
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ldr sp, sp_irq
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mov r0, PSR_SYS_MODE
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msr cpsr_cf, r0
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ldr sp, sp_sys
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ldr r1, =INTR_VECTOR
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adr r0, IntrMain
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str r0, [r1]
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ldr r1, =AgbMain
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mov lr, pc
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bx r1
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b Init
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.align 2, 0
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sp_sys: .word IWRAM_END - 0x1C0
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sp_irq: .word IWRAM_END - 0x60
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.pool
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.arm
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.align 2, 0
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.global IntrMain
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IntrMain:
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mov r3, REG_BASE
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add r3, r3, 0x200
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ldr r2, [r3, OFFSET_REG_IE - 0x200]
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ldrh r1, [r3, OFFSET_REG_IME - 0x200]
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mrs r0, spsr
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stmdb sp!, {r0-r3,lr}
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mov r0, 0
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strh r0, [r3, OFFSET_REG_IME - 0x200]
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and r1, r2, r2, lsr 16
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mov r12, 0
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ands r0, r1, INTR_FLAG_VCOUNT
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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mov r0, 0x1
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strh r0, [r3, OFFSET_REG_IME - 0x200]
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ands r0, r1, INTR_FLAG_SERIAL
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_TIMER3
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_HBLANK
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_VBLANK
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_TIMER0
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_TIMER1
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_TIMER2
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_DMA0
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_DMA1
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_DMA2
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_DMA3
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_KEYPAD
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bne IntrMain_FoundIntr
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add r12, r12, 0x4
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ands r0, r1, INTR_FLAG_GAMEPAK
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strbne r0, [r3, OFFSET_REG_SOUNDCNT_X - 0x200]
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bne . @ spin
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IntrMain_FoundIntr:
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strh r0, [r3, OFFSET_REG_IF - 0x200]
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bic r2, r2, r0
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ldr r0, =gRfuState
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ldr r0, [r0]
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ldrb r0, [r0, 0xA]
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mov r1, 0x8
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mov r0, r1, lsl r0
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orr r0, r0, INTR_FLAG_GAMEPAK
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orr r1, r0, INTR_FLAG_SERIAL | INTR_FLAG_TIMER3 | INTR_FLAG_VCOUNT | INTR_FLAG_HBLANK
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and r1, r1, r2
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strh r1, [r3, OFFSET_REG_IE - 0x200]
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mrs r3, cpsr
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bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK
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orr r3, r3, PSR_SYS_MODE
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msr cpsr_cf, r3
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ldr r1, =gIntrTable
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add r1, r1, r12
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ldr r0, [r1]
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stmdb sp!, {lr}
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adr lr, IntrMain_RetAddr
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bx r0
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IntrMain_RetAddr:
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ldmia sp!, {lr}
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mrs r3, cpsr
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bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK
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orr r3, r3, PSR_I_BIT | PSR_IRQ_MODE
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msr cpsr_cf, r3
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ldmia sp!, {r0-r3,lr}
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strh r2, [r3, OFFSET_REG_IE - 0x200]
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strh r1, [r3, OFFSET_REG_IME - 0x200]
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msr spsr_cf, r0
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bx lr
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.pool
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.align 2, 0 @ Don't pad with nop.
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