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/* |
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* emul_op.cpp - 68k opcodes for ROM patches |
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* |
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* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig |
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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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#include "name_registry.h" |
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#include "user_strings.h" |
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#include "emul_op.h" |
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#include "thunks.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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void EmulOp(M68kRegisters *r, uint32 pc, int selector) |
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{ |
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– |
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D(bug("EmulOp %04x at %08x\n", selector, pc)); |
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switch (selector) { |
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case OP_BREAK: // Breakpoint |
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// Install drivers |
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InstallDrivers(); |
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– |
#if !EMULATED_PPC |
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// Patch MakeExecutable() |
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MakeExecutableTvec = (uint32 *)FindLibSymbol("\023PrivateInterfaceLib", "\016MakeExecutable"); |
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D(bug("MakeExecutable TVECT at %p\n", MakeExecutableTvec)); |
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#ifdef __BEOS__ |
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MakeExecutableTvec[0] = ((uint32 *)MakeExecutable)[0]; |
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#else |
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MakeExecutableTvec[0] = (uint32)MakeExecutable; |
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#endif |
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MakeExecutableTvec[0] = htonl(NativeFunction(NATIVE_MAKE_EXECUTABLE)); |
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#if !EMULATED_PPC |
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MakeExecutableTvec[1] = (uint32)TOC; |
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#endif |
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// Patch DebugStr() |
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static const uint16 proc[] = { |
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M68K_EMUL_OP_DEBUG_STR, |
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0x4e74, // rtd #4 |
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0x0004 |
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PW(M68K_EMUL_OP_DEBUG_STR), |
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PW(0x4e74), // rtd #4 |
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PW(0x0004) |
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}; |
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WriteMacInt32(0x1dfc, (uint32)proc); |
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break; |
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#if !PRECISE_TIMING |
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TimerInterrupt(); |
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#endif |
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ExecutePPC(VideoVBL); |
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ExecuteNative(NATIVE_VIDEO_VBL); |
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static int tick_counter = 0; |
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if (++tick_counter >= 60) { |
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} |
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if (InterruptFlags & INTFLAG_ETHER) { |
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ClearInterruptFlag(INTFLAG_ETHER); |
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ExecutePPC(EtherIRQ); |
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ExecuteNative(NATIVE_ETHER_IRQ); |
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} |
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if (InterruptFlags & INTFLAG_TIMER) { |
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ClearInterruptFlag(INTFLAG_TIMER); |
