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/* |
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* rom_patches.cpp - ROM patches |
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* |
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* Basilisk II (C) 1997-2000 Christian Bauer |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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uint32 PutScrapPatch; // Mac address of PutScrap() patch |
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uint32 ROMBreakpoint = 0; // ROM offset of breakpoint (0 = disabled, 0x2310 = CritError) |
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bool PrintROMInfo = false; // Flag: print ROM information in PatchROM() |
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bool PatchHWBases = true; // Flag: patch hardware base addresses |
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static uint32 sony_offset; // ROM offset of .Sony driver |
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static uint32 serd_offset; // ROM offset of SERD resource (serial drivers) |
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// Prototypes |
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uint16 ROMVersion; |
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/* |
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* Convenience functions for retrieving a particular 16-bit word from |
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* a 32-bit word value. |
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* |
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* gb-- probably put those elsewhere... |
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* Macros used to extract one of the 16-bit words from a 32-bit word value |
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*/ |
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#define HiWord(X) (((X) >> 16) & 0xffff) |
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bp = ROMBaseHost + UniversalInfo + 18; // productKind |
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*bp = PrefsFindInt32("modelid"); |
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#if !ROM_IS_WRITE_PROTECTED |
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#if defined(USE_SCRATCHMEM_SUBTERFUGE) |
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// Set hardware base addresses to scratch memory area |
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if (PatchHWBases) { |
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extern uint8 *ScratchMem; |
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const uint32 ScratchMemBase = Host2MacAddr(ScratchMem); |
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D(bug("LMGlob\tOfs/4\tBase\n")); |
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base = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo); // decoderInfoPtr |
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wp = (uint16 *)(ROMBaseHost + 0x94a); |
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while (*wp != 0xffff) { |
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int16 ofs = ntohs(*wp++); // offset in decoderInfo (/4) |
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int16 lmg = ntohs(*wp++); // address of LowMem global |
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D(bug("0x%04x\t%d\t0x%08x\n", lmg, ofs, ReadMacInt32(base + ofs*4))); |
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// Fake address only if this is not the ASC base |
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if (lmg != 0xcc0) |
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WriteMacInt32(base + ofs*4, ScratchMemBase); |
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} |
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} |
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#else |
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#error System specific handling for writable ROM is required here |
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#endif |
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#endif |
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// Make FPU optional |
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if (FPUType == 0) { |
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bp = ROMBaseHost + UniversalInfo + 22; // defaultRSRCs |
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#endif |
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#if !ROM_IS_WRITE_PROTECTED |
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#if defined(AMIGA) || defined(USE_SCRATCHMEM_SUBTERFUGE) |
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#if defined(USE_SCRATCHMEM_SUBTERFUGE) |
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// Set fake handle at 0x0000 to scratch memory area (so broken Mac programs won't write into Mac ROM) |
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extern uint8 *ScratchMem; |
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const uint32 ScratchMemBase = Host2MacAddr(ScratchMem); |
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if (ROMSize > 0x80000) { |
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// BlockMove() |
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static const uint8 ptest_dat[] = {0xa0, 0x8d, 0x0c, 0x81, 0x00, 0x00, 0x0c, 0x00, 0x6d, 0x06, 0x4e, 0x71, 0xf4, 0xf8}; |
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base = find_rom_data(0x87000, 0x87800, ptest_dat, sizeof(ptest_dat)); |
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D(bug("ptest %08lx\n", base)); |
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static const uint8 bmove_dat[] = {0x20, 0x5f, 0x22, 0x5f, 0x0c, 0x38, 0x00, 0x04, 0x01, 0x2f}; |
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base = find_rom_data(0x87000, 0x87800, bmove_dat, sizeof(bmove_dat)); |
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D(bug("block_move %08lx\n", base)); |
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if (base) { // ROM15/22/23/26/27/32 |
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wp = (uint16 *)(ROMBaseHost + base + 8); |
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*wp = htons(M68K_NOP); |
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wp = (uint16 *)(ROMBaseHost + base + 4); |
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*wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE); |
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*wp++ = htons(0x7000); |
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*wp = htons(M68K_RTS); |
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} |
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// SANE |
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*wp++ = htons(base >> 16); |
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*wp = htons(base & 0xffff); |
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#if EMULATED_68K |
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// Replace BlockMove() |
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wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa02e)); // BlockMove() |
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*wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE); |
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*wp++ = htons(0x7000); |
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*wp = htons(M68K_RTS); |
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#endif |
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// Look for double PACK 4 resources |
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if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4)) == 0) return false; |
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if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4, true)) == 0 && FPUType == 0) |
