dionmoustos/Pokemon-Firered
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Use official names for crt0 routines

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This commit is contained in:
PikalaxALT
2020-01-07 09:39:57 -05:00
parent ccb5c0f324
commit cdc025132e
5 changed files with 60 additions and 143 deletions
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asm/crt0.s
+49 -46
View File
@@ -1,4 +1,6 @@
.include "constants/gba_constants.inc"
.include "constants/misc_constants.inc"
.include "constants/version.inc"
.syntax unified
@@ -8,8 +10,8 @@
.arm
Start: @ 8000000
b Init
_start: @ 8000000
b start_vector
.include "asm/rom_header.inc"
@@ -32,33 +34,33 @@ GPIOPortReadEnable: @ 80000C8
@ 80000D0
@ TODO: figure out what this data is
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
.4byte 0xFFFFFFFF
@ 8000100
.global CartIdent
CartIdent:
.4byte GAME_VERSION
.4byte GAME_LANGUAGE
.game_name:
.ifdef FIRERED
.4byte 4
.4byte 2
.ascii "pokemon red version"
.space 13
.else
.ifdef LEAFGREEN
.4byte 5
.4byte 2
.ascii "pokemon green version"
.space 11
.endif
.endif
.space .game_name+0x20-.
.4byte gMonFrontPicTable
.4byte gMonBackPicTable
.4byte gMonPaletteTable
@@ -118,32 +120,32 @@ GPIOPortReadEnable: @ 80000C8
.arm
.align 2, 0
.global Init
Init:
.global start_vector
start_vector:
mov r0, PSR_IRQ_MODE
msr cpsr_cf, r0
ldr sp, sp_irq
mov r0, PSR_SYS_MODE
msr cpsr_cf, r0
ldr sp, sp_sys
ldr sp, sp_usr
ldr r1, =INTR_VECTOR
adr r0, IntrMain
adr r0, intr_main
str r0, [r1]
ldr r1, =AgbMain
mov lr, pc
bx r1
b Init
b start_vector
.align 2, 0
sp_sys: .word IWRAM_END - 0x1C0
sp_usr: .word IWRAM_END - 0x1C0
sp_irq: .word IWRAM_END - 0x60
.pool
.arm
.align 2, 0
.global IntrMain
IntrMain:
.global intr_main
intr_main:
mov r3, REG_BASE
add r3, r3, 0x200
ldr r2, [r3, OFFSET_REG_IE - 0x200]
@@ -155,50 +157,51 @@ IntrMain:
and r1, r2, r2, lsr 16
mov r12, 0
ands r0, r1, INTR_FLAG_VCOUNT
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
mov r0, 0x1
strh r0, [r3, OFFSET_REG_IME - 0x200]
ands r0, r1, INTR_FLAG_SERIAL
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_TIMER3
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_HBLANK
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_VBLANK
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_TIMER0
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_TIMER1
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_TIMER2
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_DMA0
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_DMA1
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_DMA2
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_DMA3
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_KEYPAD
bne IntrMain_FoundIntr
bne jump_intr
add r12, r12, 0x4
ands r0, r1, INTR_FLAG_GAMEPAK
strbne r0, [r3, OFFSET_REG_SOUNDCNT_X - 0x200]
bne . @ spin
IntrMain_FoundIntr:
loop:
bne loop @ spin
jump_intr:
strh r0, [r3, OFFSET_REG_IF - 0x200]
bic r2, r2, r0
ldr r0, =gRfuState
@@ -218,9 +221,9 @@ IntrMain_FoundIntr:
add r1, r1, r12
ldr r0, [r1]
stmdb sp!, {lr}
adr lr, IntrMain_RetAddr
adr lr, intr_return
bx r0
IntrMain_RetAddr:
intr_return:
ldmia sp!, {lr}
mrs r3, cpsr
bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK