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