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.include "../asm/macros/asm.inc"
.include "../asm/macros/function.inc"
.include "../constants/gba_constants.inc"
.set SIO_ERROR, 0x0040
.set SIO_MULTI_BUSY, 0x0080
.set EWRAM_ORIG, 0x02000000
.set gCode, 0x02010000
.set PROG_ORIG, 0x00008000
.syntax unified
.text
arm_func_start _start
_start: @ 0
b _entry
arm_func_end _start
.include "asm/berry_fix_header.inc"
@ C0
.word 0
.global _GPIOPortData
_GPIOPortData: @ C4
.2byte 0
.global _GPIOPortDirection
_GPIOPortDirection: @ C6
.2byte 0
.global _GPIOPortReadEnable
_GPIOPortReadEnable: @ C8
.2byte 0
@ CA
.2byte 0
@ CC
.space 0x34
arm_func_start _entry
_entry: @ 100
b _send
arm_func_end _entry
.space 0x1C
arm_func_start _recv
_recv:
@ Waits until link cable is no longer busy.
@ Returns nz if an error has occurred
@ Otherwise, returns the received short in r1.
@ Preserves r0
_120:
ldrh r1, [r0, 0x8] @ SIOCNT
tst r1, SIO_MULTI_BUSY
beq _120
_12c:
ldrh r1, [r0, 0x8] @ SIOCNT
tst r1, SIO_MULTI_BUSY
bne _12c
ldrh r1, [r0, 0x8] @ SIOCNT
tst r1, SIO_ERROR
bxne lr
ldrh r1, [r0] @ SIOMULTI0
bx lr
arm_func_end _recv
arm_func_start _send
_send: @ 14c
ldr r0, =REG_SIOMULTI0
_150:
bl _recv
bne _150
mov r2, 0
strh r2, [r0, 0xa] @ SIOMLT_SEND
cmp r1, 0
bne _150
mov r2, 0x8000
_16c:
mov r1, 0
_170:
strh r1, [r0, 0xa] @ SIOMLT_SEND
bl _recv
bne _150
cmp r1, r2
bne _16c
lsr r2, 5
cmp r1, 0
bne _170
ldr r3, =BerryFixMBHeaderGameCode
ldrh r2, [r3]
strh r2, [r0, 0xa] @ SIOMLT_SEND
bl _recv
_1a0:
bne _1a0
cmp r1, r2
bne _1a0
ldrh r2, [r3, 0x2]
strh r2, [r0, 0xa] @ SIOMLT_SEND
bl _recv
bne _1a0
cmp r1, r2
bne _1a0
mov r1, 0
strh r1, [r0, 0xa] @ SIOMLT_SEND
ldr r0, =_data_2f0
ldr r1, =gCode
swi 0x11 << 16
ldr lr, =gCode
bx lr
.pool
arm_func_end _send
@ 1f0
.align 2, 0 @ don't pad with nop
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