Merge pull request #2557 from AdmiralCurtiss/gc-sram-checksum
GameCube SRAM: Recalculate checksums after setting language.
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commit
9969273994
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@ -116,6 +116,7 @@ CEXIIPL::CEXIIPL() :
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// We Overwrite language selection here since it's possible on the GC to change the language as you please
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g_SRAM.lang = SConfig::GetInstance().m_LocalCoreStartupParameter.SelectedLanguage;
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FixSRAMChecksums();
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WriteProtectMemory(m_pIPL, ROM_SIZE);
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m_uAddress = 0;
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@ -89,3 +89,16 @@ void SetCardFlashID(u8* buffer, u8 card_index)
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g_SRAM.flashID_chksum[card_index] = csum^0xFF;
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}
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void FixSRAMChecksums()
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{
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u16 checksum = 0;
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u16 checksum_inv = 0;
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for (int i = 0x0C; i < 0x14; i += 2)
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{
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int value = (g_SRAM.p_SRAM[i] << 8) + g_SRAM.p_SRAM[i+1];
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checksum += value;
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checksum_inv += value ^ 0xFFFF;
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}
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g_SRAM.checksum = Common::swap16(checksum);
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g_SRAM.checksum_inv = Common::swap16(checksum_inv);
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}
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@ -38,6 +38,20 @@ distribution.
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#include "Common/CommonTypes.h"
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#pragma pack(push,1)
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union SRAMFlags
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{
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u8 Hex;
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struct
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{
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u8 : 2;
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u8 sound : 1; // Audio settings; 0 = Mono, 1 = Stereo
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u8 initialized : 1; // if 0, displays prompt to set language on boot and asks user to set options and time/date
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u8 : 2;
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u8 boot_menu : 1; // if 1, skips logo animation and boots into the system menu regardless of if there is a disc inserted
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u8 progressive : 1; // if 1, automatically displays Progressive Scan prompt in games that support it
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};
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};
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union SRAM
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{
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u8 p_SRAM[64];
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@ -51,7 +65,7 @@ union SRAM
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s8 display_offsetH; // Pixel offset for the VI
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u8 ntd; // Unknown attribute
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u8 lang; // Language of system
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u8 flags; // Device and operations flag
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SRAMFlags flags; // Device and operations flag
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// Stored configuration value from the extended SRAM area
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u8 flash_id[2][12]; // flash_id[2][12] 96bit memorycard unlock flash ID
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@ -66,6 +80,7 @@ union SRAM
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#pragma pack(pop)
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void InitSRAM();
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void SetCardFlashID(u8* buffer, u8 card_index);
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void FixSRAMChecksums();
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extern SRAM sram_dump;
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extern SRAM g_SRAM;
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