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dpavlin |
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include "ppport.h" |
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#include "Z80.h" |
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#include "config.h" |
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Z80 *R = NULL; |
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int debug = 0; |
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void update_C_R(void) { |
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R->AF.W = SvIV( get_sv("Z80::AF", FALSE) ); |
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R->BC.W = SvIV( get_sv("Z80::BC", FALSE) ); |
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R->DE.W = SvIV( get_sv("Z80::DE", FALSE) ); |
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R->HL.W = SvIV( get_sv("Z80::HL", FALSE) ); |
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R->IX.W = SvIV( get_sv("Z80::IX", FALSE) ); |
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R->IY.W = SvIV( get_sv("Z80::IY", FALSE) ); |
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R->PC.W = SvIV( get_sv("Z80::PC", FALSE) ); |
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R->SP.W = SvIV( get_sv("Z80::SP", FALSE) ); |
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R->AF1.W = SvIV( get_sv("Z80::AF1", FALSE) ); |
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R->BC1.W = SvIV( get_sv("Z80::BC1", FALSE) ); |
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R->DE1.W = SvIV( get_sv("Z80::DE1", FALSE) ); |
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R->HL1.W = SvIV( get_sv("Z80::HL1", FALSE) ); |
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R->IFF = SvIV( get_sv("Z80::IFF", FALSE) ); |
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R->I = SvIV( get_sv("Z80::I", FALSE) ); |
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R->R = SvIV( get_sv("Z80::R", FALSE) ); |
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R->PC.W = SvIV( get_sv("Z80::PC", FALSE) ); |
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R->IPeriod = SvIV( get_sv("Z80::IPeriod", FALSE) ); |
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R->IRequest = SvIV( get_sv("Z80::IRequest", FALSE) ); |
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R->IAutoReset = SvIV( get_sv("Z80::IAutoReset", FALSE) ); |
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R->TrapBadOps = SvIV( get_sv("Z80::TrapBadOps", FALSE) ); |
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R->Trap = SvIV( get_sv("Z80::Trap", FALSE) ); |
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R->Trace = SvIV( get_sv("Z80::Trace", FALSE) ); |
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debugf(("pull_R finished")); |
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dump_R; |
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} |
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void update_perl_R(void) { |
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debugf(("update_perl_R")); |
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dSP; |
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ENTER; |
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SAVETMPS; |
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PUSHMARK(SP); |
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XPUSHs( sv_2mortal( newSViv( R->AF.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->BC.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->DE.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->HL.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IX.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IY.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->SP.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->AF1.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->BC1.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->DE1.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->HL1.W ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IFF ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->I ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->R ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IPeriod ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->ICount ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IRequest ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->IAutoReset ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->TrapBadOps ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->Trap ) ) ); |
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XPUSHs( sv_2mortal( newSViv( R->Trace ) ) ); |
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PUTBACK; |
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call_pv("Z80::_update_perl_R", G_DISCARD ); |
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debugf(("_update_perl_R returned to C")); |
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dump_R; |
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FREETMPS; |
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LEAVE; |
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} |
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/** DebugZ80() ***********************************************/ |
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/** This function should exist if DEBUG is #defined. When **/ |
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/** Trace!=0, it is called after each command executed by **/ |
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/** the CPU, and given the Z80 registers. Emulation exits **/ |
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/** if DebugZ80() returns 0. **/ |
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/*************************************************************/ |
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byte DebugZ80(Z80 *R) { |
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dump_R; |
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return 1; // continue emulation |
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} |
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/** RdZ80()/WrZ80() ******************************************/ |
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/** These functions are called when access to RAM occurs. **/ |
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/** They allow to control memory access. **/ |
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/************************************ TO BE WRITTEN BY USER **/ |
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byte mem(word Addr) { |
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byte byte; |
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int count; |
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debugf(("mem(%04x)", Addr)); |
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dSP; |
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ENTER; |
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SAVETMPS; |
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PUSHMARK(SP); |
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XPUSHs( sv_2mortal( newSViv( Addr ) ) ); |
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PUTBACK; |
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count = call_pv("Z80::_read", G_ARRAY | G_EVAL ); |
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debugf(("got %d values", count)); |
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SPAGAIN; |
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if (SvTRUE(ERRSV)) { |
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printf("ERROR: %s", SvPV_nolen( ERRSV ) ); |
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exit(1); |
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} |
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if ( count != 1 ) { |
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printf("expect 1 return value, got %d", count); |
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exit(1); |
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} |
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SV *sv; |
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sv = POPs; |
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byte = SvIV(sv); |
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FREETMPS; |
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LEAVE; |
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debugf(("mem(%04x) = %02x", Addr, byte)); |
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return byte; |
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} |
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byte RdZ80(register word Addr) { |
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byte Value; |
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Value = mem(Addr); |
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debugf(("RdZ80(%04x) = %02x", Addr, Value)); |
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return Value; |
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} |
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void WrZ80(register word Addr,register byte Value) { |
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debugf(("WrZ80(%04x,%02x)", Addr, Value)); |
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dSP; |
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ENTER; |
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SAVETMPS; |
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PUSHMARK(SP); |
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XPUSHs( sv_2mortal( newSViv( Addr ) ) ); |
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XPUSHs( sv_2mortal( newSViv( Value ) ) ); |
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PUTBACK; |
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call_pv("Z80::_write", G_DISCARD ); |
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FREETMPS; |
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LEAVE; |
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} |
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/** LoopZ80() ************************************************/ |
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/** Z80 emulation calls this function periodically to check **/ |
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/** if the system hardware requires any interrupts. This **/ |
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/** function must return an address of the interrupt vector **/ |
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/** (0x0038, 0x0066, etc.) or INT_NONE for no interrupt. **/ |
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/** Return INT_QUIT to exit the emulation loop. **/ |
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/************************************ TO BE WRITTEN BY USER **/ |
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int hw_int = INT_NONE; |
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word LoopZ80(register Z80 *R) { |
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debugf(("LoopZ80")); |
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dump_R; |
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return hw_int; |
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} |
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/** JumpZ80() ************************************************/ |
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/** Z80 emulation calls this function when it executes a **/ |
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/** JP, JR, CALL, RST, or RET. You can use JumpZ80() to **/ |
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/** trap these opcodes and switch memory layout. **/ |
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/************************************ TO BE WRITTEN BY USER **/ |
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#ifndef JUMPZ80 |
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#define JumpZ80(PC) |
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#else |
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void JumpZ80(word PC); |
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#endif |
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/** PatchZ80() ***********************************************/ |
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/** Z80 emulation calls this function when it encounters a **/ |
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/** special patch command (ED FE) provided for user needs. **/ |
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/** For example, it can be called to emulate BIOS calls, **/ |
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/** such as disk and tape access. Replace it with an empty **/ |
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/** macro for no patching. **/ |
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/************************************ TO BE WRITTEN BY USER **/ |
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void PatchZ80(register Z80 *R) { |
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debugf(("PatchZ80")); |
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dump_R; |
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hw_int = INT_QUIT; |
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} |
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/*************************************************************/ |
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int |
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reset (void) { |
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debugf(("Z80::reset called")); |
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if ( ! R ) { |
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debugf(("allocating space for R")); |
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R = malloc(sizeof(Z80)); |
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if (!R) { |
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PerlIO_stdoutf("can't alloc %d bytes for Z80", sizeof(Z80)); |
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exit(1); |
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} |
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} |
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ResetZ80(R); |
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debugf(("ResetZ80 over")); |
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update_perl_R(); |
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dump_R; |
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return 1; |
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} |
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int exec(int cycles) { |
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int left; |
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debugf(("exec for %d cycles", cycles)); |
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if (!R) reset(); |
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update_C_R(); |
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left = ExecZ80(R, cycles); |
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update_perl_R(); |
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debugf(("end of %d cycles CPU run\n", cycles)); |
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return left; |
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} |
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int set_debug(int state) { |
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debug = state; |
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return debug; |
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} |
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int get_debug(void) { |
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return debug; |
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} |
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MODULE = Z80 PACKAGE = Z80 |
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PROTOTYPES: DISABLE |
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int |
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set_debug(int state) |
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int |
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get_debug() |
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int |
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reset() |
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void |
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update_C_R() |
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void |
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update_perl_R() |
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int |
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exec(int cycles) |
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