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- added code to fake HWBases to scratch memory area

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This commit is contained in:
gbeauche 2001-02-10 11:37:42 +00:00
parent 52d36668fe
commit a76e2d5da4
2 changed files with 27 additions and 21 deletions
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16
BasiliskII/src/emul_op.cpp
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@ -248,22 +248,6 @@ void EmulOp(uint16 opcode, M68kRegisters *r)
WriteMacInt8(asc_regs + 0x800, 0x0f); // Set ASC version number
WriteMacInt32(0xcc0, asc_regs); // Set ASCBase
}
#if (REAL_ADDRESSING || DIRECT_ADDRESSING) && defined(USE_SCRATCHMEM_SUBTERFUGE)
extern uint8 *ScratchMem;
// Set VIA base address to scratch memory area
D(bug("Patch VIA base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1d4)));
WriteMacInt32(0x1d4, Host2MacAddr(ScratchMem));
// Set SCCRd base address to scratch memory area
D(bug("Patch SCCRd base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1d8)));
WriteMacInt32(0x1d8, Host2MacAddr(ScratchMem));
// Set SCCWr base address to scratch memory area
D(bug("Patch SCCWr base address [0x%x] to ScratchMem\n", ReadMacInt32(0x1dc)));
WriteMacInt32(0x1dc, Host2MacAddr(ScratchMem));
#endif
break;
}

32
BasiliskII/src/rom_patches.cpp
View File

@ -43,6 +43,7 @@ uint32 UniversalInfo; // ROM offset of UniversalInfo
uint32 PutScrapPatch; // Mac address of PutScrap() patch
uint32 ROMBreakpoint = 0; // ROM offset of breakpoint (0 = disabled, 0x2310 = CritError)
bool PrintROMInfo = false; // Flag: print ROM information in PatchROM()
bool PatchHWBases = true; // Flag: patch hardware base addresses
static uint32 sony_offset; // ROM offset of .Sony driver
static uint32 serd_offset; // ROM offset of SERD resource (serial drivers)
@ -52,12 +53,8 @@ static uint32 debugutil_offset; // ROM offset of DebugUtil() replacement routin
// Prototypes
uint16 ROMVersion;
/*
* Convenience functions for retrieving a particular 16-bit word from
* a 32-bit word value.
*
* gb-- probably put those elsewhere...
* Macros used to extract one of the 16-bit words from a 32-bit word value
*/
#define HiWord(X) (((X) >> 16) & 0xffff)
@ -1032,6 +1029,31 @@ static bool patch_rom_32(void)
bp = ROMBaseHost + UniversalInfo + 18; // productKind
*bp = PrefsFindInt32("modelid");
#if !ROM_IS_WRITE_PROTECTED
#if defined(USE_SCRATCHMEM_SUBTERFUGE)
// Set hardware base addresses to scratch memory area
if (PatchHWBases) {
extern uint8 *ScratchMem;
const uint32 ScratchMemBase = Host2MacAddr(ScratchMem);
D(bug("LMGlob\tOfs/4\tBase\n"));
base = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo); // decoderInfoPtr
wp = (uint16 *)(ROMBaseHost + 0x94a);
while (*wp != 0xffff) {
int16 ofs = ntohs(*wp++); // offset in decoderInfo (/4)
int16 lmg = ntohs(*wp++); // address of LowMem global
D(bug("0x%04x\t%d\t0x%08x\n", lmg, ofs, ReadMacInt32(base + ofs*4)));
// Fake address only if this is not the ASC base
if (lmg != 0xcc0)
WriteMacInt32(base + ofs*4, ScratchMemBase);
}
}
#else
#error System specific handling for writable ROM is required here
#endif
#endif
// Make FPU optional
if (FPUType == 0) {
bp = ROMBaseHost + UniversalInfo + 22; // defaultRSRCs