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/*
* Copyright (C) 2016 FIX94
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
#include <gba.h>
#include <stdio.h>
#include <stdlib.h>
#include "libSave.h"
#define REG_WAITCNT *(vu16 *)(REG_BASE + 0x204)
#define JOY_WRITE 2
#define JOY_READ 4
#define JOY_RW 6
u8 save_data[0x20000] __attribute__ ((section (".sbss")));
s32 getGameSize(void)
{
if(*(vu32*)(0x08000004) != 0x51AEFF24)
return -1;
s32 i;
for(i = (1<<20); i < (1<<25); i<<=1)
{
vu16 *rompos = (vu16*)(0x08000000+i);
int j;
bool romend = true;
for(j = 0; j < 0x1000; j++)
{
if(rompos[j] != j)
{
romend = false;
break;
}
}
if(romend) break;
}
return i;
}
//---------------------------------------------------------------------------------
// Program entry point
//---------------------------------------------------------------------------------
int main(void) {
//---------------------------------------------------------------------------------
// the vblank interrupt must be enabled for VBlankIntrWait() to work
// since the default dispatcher handles the bios flags no vblank handler
// is required
irqInit();
irqEnable(IRQ_VBLANK);
consoleDemoInit();
REG_JOYTR = 0;
// ansi escape sequence to set print co-ordinates
// /x1b[line;columnH
u32 i;
iprintf("\x1b[9;2HGBA Link Cable Dumper v1.4\n");
iprintf("\x1b[10;4HPlease look at the TV\n");
// disable this, needs power
SNDSTAT = 0;
SNDBIAS = 0;
// Set up waitstates for EEPROM access etc.
REG_WAITCNT = 0x0317;
//clear out previous messages
REG_HS_CTRL |= JOY_RW;
while (1) {
if(REG_HS_CTRL&JOY_READ)
{
REG_HS_CTRL |= JOY_RW;
s32 gamesize = getGameSize();
u32 savesize = SaveSize(save_data,gamesize);
REG_JOYTR = gamesize;
//wait for a cmd receive for safety
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
REG_JOYTR = savesize;
//wait for a cmd receive for safety
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
if(gamesize == -1)
{
REG_JOYTR = 0;
continue; //nothing to read
}
//game in, send header
for(i = 0; i < 0xC0; i+=4)
{
REG_JOYTR = *(vu32*)(0x08000000+i);
while((REG_HS_CTRL&JOY_READ) == 0) ;
REG_HS_CTRL |= JOY_RW;
}
REG_JOYTR = 0;
//wait for other side to choose
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
u32 choseval = REG_JOYRE;
if(choseval == 0)
{
REG_JOYTR = 0;
continue; //nothing to read
}
else if(choseval == 1)
{
//disable interrupts
u32 prevIrqMask = REG_IME;
REG_IME = 0;
//dump the game
for(i = 0; i < gamesize; i+=4)
{
REG_JOYTR = *(vu32*)(0x08000000+i);
while((REG_HS_CTRL&JOY_READ) == 0) ;
REG_HS_CTRL |= JOY_RW;
}
//restore interrupts
REG_IME = prevIrqMask;
}
else if(choseval == 2)
{
//disable interrupts
u32 prevIrqMask = REG_IME;
REG_IME = 0;
//backup save
switch (savesize){
case 0x200:
GetSave_EEPROM_512B(save_data);
break;
case 0x2000:
GetSave_EEPROM_8KB(save_data);
break;
case 0x8000:
GetSave_SRAM_32KB(save_data);
break;
case 0x10000:
GetSave_FLASH_64KB(save_data);
break;
case 0x20000:
GetSave_FLASH_128KB(save_data);
break;
default:
break;
}
//restore interrupts
REG_IME = prevIrqMask;
//say gc side we read it
REG_JOYTR = savesize;
//wait for a cmd receive for safety
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
//send the save
for(i = 0; i < savesize; i+=4)
{
REG_JOYTR = *(vu32*)(save_data+i);
while((REG_HS_CTRL&JOY_READ) == 0) ;
REG_HS_CTRL |= JOY_RW;
}
}
else if(choseval == 3)
{
REG_JOYTR = savesize;
//receive the save
for(i = 0; i < savesize; i+=4)
{
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
*(vu32*)(save_data+i) = REG_JOYRE;
}
//disable interrupts
u32 prevIrqMask = REG_IME;
REG_IME = 0;
//write it
switch (savesize){
case 0x200:
PutSave_EEPROM_512B(save_data);
break;
case 0x2000:
PutSave_EEPROM_8KB(save_data);
break;
case 0x8000:
PutSave_SRAM_32KB(save_data);
break;
case 0x10000:
PutSave_FLASH_64KB(save_data);
break;
case 0x20000:
PutSave_FLASH_128KB(save_data);
break;
default:
break;
}
//restore interrupts
REG_IME = prevIrqMask;
//say gc side we're done
REG_JOYTR = 0;
//wait for a cmd receive for safety
while((REG_HS_CTRL&JOY_WRITE) == 0) ;
REG_HS_CTRL |= JOY_RW;
}
REG_JOYTR = 0;
}
else if(REG_HS_CTRL&JOY_WRITE)
{
REG_HS_CTRL |= JOY_RW;
u32 choseval = REG_JOYRE;
if(choseval == 4)
{
//disable interrupts
u32 prevIrqMask = REG_IME;
REG_IME = 0;
//dump BIOS
for (i = 0; i < 0x4000; i+=4)
{
// the lower bits are inaccurate, so just get it four times :)
u32 a = MidiKey2Freq((WaveData *)(i-4), 180-12, 0) * 2;
u32 b = MidiKey2Freq((WaveData *)(i-3), 180-12, 0) * 2;
u32 c = MidiKey2Freq((WaveData *)(i-2), 180-12, 0) * 2;
u32 d = MidiKey2Freq((WaveData *)(i-1), 180-12, 0) * 2;
REG_JOYTR = ((a>>24<<24) | (d>>24<<16) | (c>>24<<8) | (b>>24));
while((REG_HS_CTRL&JOY_READ) == 0) ;
REG_HS_CTRL |= JOY_RW;
}
//restore interrupts
REG_IME = prevIrqMask;
}
REG_JOYTR = 0;
}
Halt();
}
}
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