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https://github.com/kanjitalk755/macemu.git
synced 2024-09-03 21:29:03 +00:00
- added code to fake HWBases to scratch memory area
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@ -248,22 +248,6 @@ void EmulOp(uint16 opcode, M68kRegisters *r)
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WriteMacInt8(asc_regs + 0x800, 0x0f); // Set ASC version number
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WriteMacInt32(0xcc0, asc_regs); // Set ASCBase
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}
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#if (REAL_ADDRESSING || DIRECT_ADDRESSING) && defined(USE_SCRATCHMEM_SUBTERFUGE)
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extern uint8 *ScratchMem;
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// Set VIA base address to scratch memory area
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D(bug("Patch VIA base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1d4)));
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WriteMacInt32(0x1d4, Host2MacAddr(ScratchMem));
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// Set SCCRd base address to scratch memory area
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D(bug("Patch SCCRd base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1d8)));
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WriteMacInt32(0x1d8, Host2MacAddr(ScratchMem));
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// Set SCCWr base address to scratch memory area
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D(bug("Patch SCCWr base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1dc)));
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WriteMacInt32(0x1dc, Host2MacAddr(ScratchMem));
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#endif
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break;
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}
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@ -43,6 +43,7 @@ uint32 UniversalInfo; // ROM offset of UniversalInfo
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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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@ -52,12 +53,8 @@ static uint32 debugutil_offset; // ROM offset of DebugUtil() replacement routin
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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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@ -1032,6 +1029,31 @@ static bool patch_rom_32(void)
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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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