mirror of
https://github.com/ApacheThunder/GBA-Exploader.git
synced 2025-06-18 19:45:39 -04:00
540515c7fc
* Can now use gbaframes specific to a gba rom being loaded to ram/flash. Have a bmp file with filename matching the game rom being flashed in GBA_SIGN path. If it finds a matching BMP it will use that before falling back to the default gbaframe.bmp paths. * nds-bootstrap now used for booting retail NDS roms from file browser. Note that currently GBA-Exploader does not create new save files so only games with existing save files (currently hardcoded to GBA_SAV path like with GBA games) can be booted with this.
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*---------------------------------------------------------------------------------
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Copyright (C) 2005
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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/arm7/serial.h>
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#include <nds/system.h>
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#include <string.h>
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//---------------------------------------------------------------------------------
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void readUserSettings() {
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//---------------------------------------------------------------------------------
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PERSONAL_DATA slots[2];
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short slot1count, slot2count;
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short slot1CRC, slot2CRC;
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uint32 userSettingsBase;
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readFirmware( 0x20, &userSettingsBase,2);
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uint32 slot1Address = userSettingsBase * 8;
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uint32 slot2Address = userSettingsBase * 8 + 0x100;
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readFirmware( slot1Address , &slots[0], sizeof(PERSONAL_DATA));
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readFirmware( slot2Address , &slots[1], sizeof(PERSONAL_DATA));
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readFirmware( slot1Address + 0x70, &slot1count, 2);
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readFirmware( slot2Address + 0x70, &slot2count, 2);
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readFirmware( slot1Address + 0x72, &slot1CRC, 2);
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readFirmware( slot2Address + 0x72, &slot2CRC, 2);
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// default to slot 1 user Settings
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int currentSettingsSlot = 0;
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short calc1CRC = swiCRC16( 0xffff, &slots[0], sizeof(PERSONAL_DATA));
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short calc2CRC = swiCRC16( 0xffff, &slots[1], sizeof(PERSONAL_DATA));
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// bail out if neither slot is valid
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if ( calc1CRC != slot1CRC && calc2CRC != slot2CRC) return;
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// if both slots are valid pick the most recent
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if ( calc1CRC == slot1CRC && calc2CRC == slot2CRC ) {
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currentSettingsSlot = (slot2count == (( slot1count + 1 ) & 0x7f) ? 1 : 0);
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} else {
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if ( calc2CRC == slot2CRC )
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currentSettingsSlot = 1;
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}
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*PersonalData = slots[currentSettingsSlot];
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}
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