mirror of
https://github.com/ApacheThunder/GBA-Exploader.git
synced 2025-06-18 19:45:39 -04:00
6c10c47a61
* libnds's swiSwitchToGBAMode ASM function was broken. They used r0 instead of r2 so it didn't work. It must have been correct when GBA Exploader was last compiled more then a decade ago, but now it's broken so this ASM function had to be reimplemented. GBA Mode switch now appears to function as intended. * As I currently lack a compatible slot-2 flashcart (SuperCard Lite doesn't work even after trying a few hardcoded card types in main.c) further testing can't be done on the rest of the code. It appears to work but I won't know for sure until someone with compatible hardware tests it.
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
/*---------------------------------------------------------------------------------
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default ARM7 core
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Copyright (C) 2005 - 2010
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Michael Noland (joat)
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Jason Rogers (dovoto)
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Dave Murphy (WinterMute)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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---------------------------------------------------------------------------------*/
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#include <nds.h>
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#include <stdlib.h>
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#include <string.h>
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#include "linkreset_arm7.h"
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volatile bool switchedMode = false;
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extern void ret_menu7_R4(void);
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extern void ret_menu7_Gen(void);
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extern void ret_menu7_mse(void);
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// libnds messed up the original SWI bios call ASM.
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// They used r0 instead of r2. This reimplementation fixes that issue for now.
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extern void swiSwitchToGBAModeFixed();
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void gbaMode() {
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vu32 vr;
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REG_IME = IME_DISABLE;
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for(vr = 0; vr < 0x1000; vr++); // Wait ARM9
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if (PersonalData->gbaScreen) {
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writePowerManagement(PM_CONTROL_REG, PM_BACKLIGHT_BOTTOM | PM_SOUND_AMP);
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} else {
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writePowerManagement(PM_CONTROL_REG, PM_BACKLIGHT_TOP | PM_SOUND_AMP);
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}
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swiSwitchToGBAModeFixed();
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while(1);
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}
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static void prepairReset() {
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vu32 vr;
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u32 i;
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powerOn(POWER_SOUND);
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for(i = 0x040000B0; i < (0x040000B0+0x30); i+=4)*((vu32*)i) = 0;
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REG_IME = IME_DISABLE;
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REG_IE = 0;
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REG_IF = ~0;
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for(vr = 0; vr < 0x100; vr++); // Wait ARM9
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swiSoftReset();
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}
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volatile bool exitflag = false;
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void powerButtonCB() { exitflag = true; }
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void fifoCheckHandler() {
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if (!switchedMode) {
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if(fifoCheckValue32(FIFO_USER_01)) {
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switchedMode = true;
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gbaMode();
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} else if (fifoCheckValue32(FIFO_USER_02)) {
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switchedMode = true;
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ret_menu7_R4();
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} else if (fifoCheckValue32(FIFO_USER_03)) {
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switchedMode = true;
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LinkReset_ARM7();
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} else if (fifoCheckValue32(FIFO_USER_04)) {
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switchedMode = true;
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ret_menu7_Gen();
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} else if (fifoCheckValue32(FIFO_USER_05)) {
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switchedMode = true;
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prepairReset();
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}
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}
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/*u32 fifo;
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if(!(REG_IPC_FIFO_CR & IPC_FIFO_RECV_EMPTY)) {
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fifo = REG_IPC_FIFO_RX;
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if(fifo == IPC_CMD_GBAMODE)gbaMode();
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if(fifo == IPC_CMD_SLOT2)prepairReset();
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if(fifo == IPC_CMD_TURNOFF) {
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PM_SetControl(1<<6);
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while(1);
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}
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if(fifo == IPC_CMD_SR_R4TF)ret_menu7_R4();
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if(fifo == IPC_CMD_SR_DLMS)LinkReset_ARM7();
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if(fifo == IPC_CMD_SR_GEN)ret_menu7_Gen();
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if(fifo == IPC_CMD_SR_MSE)ret_menu7_mse();
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}*/
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}
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void VblankHandler(void) {
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fifoCheckHandler();
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// Wifi_Update();
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}
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void VcountHandler() { inputGetAndSend(); }
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int main() {
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readUserSettings();
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ledBlink(0);
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irqInit();
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// Start the RTC tracking IRQ
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initClockIRQ();
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fifoInit();
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touchInit();
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SetYtrigger(80);
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installSystemFIFO();
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irqSet(IRQ_VCOUNT, VcountHandler);
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irqSet(IRQ_VBLANK, VblankHandler);
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irqEnable(IRQ_VBLANK | IRQ_VCOUNT);
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/*if (REG_SNDEXTCNT != 0) {
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i2cWriteRegister(0x4A, 0x12, 0x00); // Press power-button for auto-reset
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i2cWriteRegister(0x4A, 0x70, 0x01); // Bootflag = Warmboot/SkipHealthSafety
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}*/
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setPowerButtonCB(powerButtonCB);
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// Keep the ARM7 mostly idle
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while(1)swiWaitForVBlank();
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return 0;
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}
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