mirror of
https://github.com/ApacheThunder/GBA-Exploader.git
synced 2025-06-18 11:35:38 -04:00
11ea610150
* FIFO on arm7 appears to now work as intended. * GBA mode switch funcition remains broken. * Default GBA_Exploader.ini file now created if one is not present. * Moved GBA_File struct to ctrl_tble and removed duplicate from main.c. This was causing issues where I would forget to update both when I removed the now unused Alias char array. All code now shares the single instance which will prevent this issue should this struct need to be updated in the future.
161 lines
3.3 KiB
C
161 lines
3.3 KiB
C
/***********************************************************
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by Rudolph (<28>c’é)
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2007/05/24 First release
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2007/05/27 Timing adjustment with ARM9
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------------------------------------------------------------
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SoftwareReset Routines for R4DS or M3SimplyDS.
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Redistribution and use in source and binary forms,
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with or without modification, are permitted provided
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that the following conditions are met:
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Only the Homebrew application can be used.
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It is not possible to use it by a business purpose.
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This software is made based on information obtained
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by Reverse engineering.
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Please use that at once when a source code that is
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more formal than the official is open to the public.
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***************************************************************/
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#include <nds.h>
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//#include <nds/registers_alt.h> // devkitPror20
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define CARD_COMMAND REG_CARD_COMMAND
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#define CARD_CR1H REG_AUXSPICNTH
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#define CARD_CR2 REG_ROMCTRL
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#define CARD_DATA_RD REG_CARD_DATA_RD
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static int _set_r4menu()
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{
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u32 add;
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add = (*(vu32*)0x027FFE18);
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while(CARD_CR2 & CARD_BUSY);
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CARD_CR1H = 0xC0;
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CARD_COMMAND[0] = 0xB4;
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CARD_COMMAND[1] = (add >> 24) & 0xFF;
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CARD_COMMAND[2] = (add >> 16) & 0xFF;
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CARD_COMMAND[3] = (add >> 8) & 0xFF;
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CARD_COMMAND[4] = add & 0xFF;
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// CARD_COMMAND[5] = 0x00;
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// CARD_COMMAND[6] = 0x00;
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// CARD_COMMAND[7] = 0x00;
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CARD_CR2 = 0xA7586000;
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while(!(CARD_CR2 & CARD_DATA_READY));
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return(CARD_DATA_RD);
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}
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static int _read_r4menu(char *buf, u32 blk)
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{
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int s = 0;
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u32 *buf32;
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buf32 = (u32*)buf;
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blk *= 2;
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do {
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while(CARD_CR2 & CARD_BUSY);
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CARD_CR1H = 0xC0;
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CARD_COMMAND[0] = 0xB6;
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CARD_COMMAND[1] = (blk >> 16) & 0xFF;
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CARD_COMMAND[2] = (blk >> 8) & 0xFF;
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CARD_COMMAND[3] = blk & 0xFF;
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CARD_COMMAND[4] = 0x00;
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// CARD_COMMAND[5] = 0x00;
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// CARD_COMMAND[6] = 0x00;
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// CARD_COMMAND[7] = 0x00;
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CARD_CR2 = 0xA7586000;
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while(!(CARD_CR2 & CARD_DATA_READY));
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} while(CARD_DATA_RD);
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while(CARD_CR2 & CARD_BUSY);
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CARD_CR1H = 0xC0;
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CARD_COMMAND[0] = 0xBF;
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CARD_COMMAND[1] = (blk >> 16) & 0xFF;
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CARD_COMMAND[2] = (blk >> 8) & 0xFF;
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CARD_COMMAND[3] = blk & 0xFF;
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CARD_COMMAND[4] = 0x00;
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// CARD_COMMAND[5] = 0x00;
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// CARD_COMMAND[6] = 0x00;
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// CARD_COMMAND[7] = 0x00;
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CARD_CR2 = 0xA1586000;
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do {
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while(!(CARD_CR2 & CARD_DATA_READY));
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*buf32 = CARD_DATA_RD;
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buf32++;
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s += 4;
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} while(CARD_CR2 & CARD_BUSY);
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return(s);
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}
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void ret_menu7_R4()
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{
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char *adr;
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u32 blk, siz;
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u32 i;
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u32 *mem;
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REG_IME = 0;
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REG_IE = 0;
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REG_IF = REG_IF;
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REG_IPC_SYNC = 0;
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DMA0_CR = 0;
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DMA1_CR = 0;
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DMA2_CR = 0;
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DMA3_CR = 0;
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while((*(vu32*)0x027FFDFC) != 0x027FFDF8); // Timing adjustment with ARM9
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mem = (u32*)0x02000000;
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for(i = 0; i < 0x3FF800/4; i++) {
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*mem = 0x00000000;
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mem++;
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}
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// memset((u8*)0x2000000, 0x00, 0x3FF800);
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while(_set_r4menu());
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adr = (char*)0x027FFE00;
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_read_r4menu(adr, 0); // Header
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blk = (*(vu32*)0x027FFE20) / 512;
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adr = (char*)(*(vu32*)0x027FFE28);
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siz = (*(vu32*)0x027FFE2C);
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for(i = 0; i < siz; i += 512) { // ARM9
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_read_r4menu(adr, blk);
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blk++;
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adr += 512;
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}
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blk = (*(vu32*)0x027FFE30) / 512;
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adr = (char*)(*(vu32*)0x027FFE38);
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siz = (*(vu32*)0x027FFE3C);
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for(i = 0; i < siz; i += 512) { // ARM7
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_read_r4menu(adr, blk);
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blk++;
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adr += 512;
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}
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*(vu32*)0x027FFDFC = *(vu32*)0x027FFE24;
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asm("swi 0x00"); // JUMP 0x027FFE34
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while(1);
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}
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