6502
/
emu816
mirror of https://github.com/andrew-jacobs/emu816.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
emu816/emu816.h

1513 lines
22 KiB
C++
Raw Blame History

//==============================================================================
// .ooooo. .o .ooo
// d88' `8. o888 .88'
// .ooooo. ooo. .oo. .oo. oooo oooo Y88.. .8' 888 d88'
// d88' `88b `888P"Y88bP"Y88b `888 `888 `88888b. 888 d888P"Ybo.
// 888ooo888 888 888 888 888 888 .8' ``88b 888 Y88[ ]88
// 888 .o 888 888 888 888 888 `8. .88P 888 `Y88 88P
// `Y8bod8P' o888o o888o o888o `V88V"V8P' `boood8' o888o `88bod8'
//
// A Portable C++ WDC 65C816 Emulator
//------------------------------------------------------------------------------
// Copyright (C)2016 Andrew John Jacobs
// All rights reserved.
//
// This work is made available under the terms of the Creative Commons
// Attribution-NonCommercial-ShareAlike 4.0 International license. Open the
// following URL to see the details.
//
// http://creativecommons.org/licenses/by-nc-sa/4.0/
//------------------------------------------------------------------------------
#ifndef EMU816_H
#define EMU816_H
#include "mem816.h"
#include <stdlib.h>
#if 1
# define TRACE(MNEM) { if (trace) dump(MNEM, ea); }
# define BYTES(N) { if (trace) bytes(N); pc += N; }
# define SHOWPC() { if (trace) show(); }
# ifdef CHIPKIT
# define ENDL() { Serial.println (); }
# else
# define ENDL() { if (trace) cout << endl; }
# endif
#else
# define TRACE(MNEM)
# define BYTES(N) { pc += N; }
# define SHOWPC()
# define ENDL()
#endif
class emu816 :
public wdc816
{
public:
emu816(mem816 &mem);
~emu816();
void reset(bool trace);
void step();
private:
union {
struct {
Bit f_c : 1;
Bit f_z : 1;
Bit f_i : 1;
Bit f_d : 1;
Bit f_x : 1;
Bit f_m : 1;
Bit f_v : 1;
Bit f_n : 1;
};
Byte b;
} p;
Bit e;
union {
Byte b;
Word w;
} a, x, y, sp, dp;
Word pc;
Byte pbr, dbr;
mem816 &mem;
bool interrupted;
unsigned long cycles;
bool trace;
void show();
void bytes(unsigned int);
void dump(const char *, Addr);
// Push a byte on the stack
INLINE void pushByte(Byte value)
{
mem.setByte(sp.w, value);
if (e)
--sp.b;
else
--sp.w;
}
// Push a word on the stack
INLINE void pushWord(Word value)
{
pushByte(hi(value));
pushByte(lo(value));
}
// Pull a byte from the stack
INLINE Byte pullByte()
{
if (e)
++sp.b;
else
++sp.w;
return (mem.getByte(sp.w));
}
// Pull a word from the stack
INLINE Word pullWord()
{
register Byte l = pullByte();
register Byte h = pullByte();
return (join(l, h));
}
// Absolute - a
INLINE Addr am_absl()
{
register Addr ea = join (dbr, mem.getWord(bank(pbr) | pc));
BYTES(2);
return (ea);
}
// Absolute Indexed X - a,X
INLINE Addr am_absx()
{
register Addr ea = join(dbr, mem.getWord(bank(pbr) | pc)) + x.w;
BYTES(2);
return (ea);
}
// Absolute Indexed Y - a,Y
INLINE Addr am_absy()
{
register Addr ea = join(dbr, mem.getWord(bank(pbr) | pc)) + y.w;
BYTES(2);
return (ea);
}
// Absolute Indirect - (a)
INLINE Addr am_absi()
{
register Addr ia = join(0, mem.getWord(bank(pbr) | pc));
BYTES(2);
return (join(0, mem.getWord(ia)));
}
// Absolute Indexed Indirect - (a,X)
INLINE Addr am_abxi()
{
register Addr ia = join(pbr, mem.getWord(bank(pbr) | pc)) + x.w;
BYTES(2);
return (join(pbr, mem.getWord(ia)));
}
// Absolute Long - >a
INLINE Addr am_alng()
{
Addr ea = mem.getAddr(bank(pbr) | pc);
BYTES(3);
return (ea);
}
// Absolute Long Indexed - >a,X
INLINE Addr am_alnx()
{
register Addr ea = mem.getAddr(bank(pbr) | pc) + x.w;
BYTES(3);
return (ea);
}
// Absolute Indirect Long - [a]
INLINE Addr am_abil()
{
register Addr ia = bank(0) | mem.getWord(bank(pbr) | pc);
BYTES(2);
return (mem.getAddr(ia));
}
// Direct Page - d
INLINE Addr am_dpag()
{
Byte offset = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (bank(0) | (Word)(dp.w + offset));
}
// Direct Page Indexed X - d,X
INLINE Addr am_dpgx()
{
Byte offset = mem.getByte(bank(pbr) | pc) + x.b;
BYTES(1);
return (bank(0) | (Word)(dp.w + offset));
}
// Direct Page Indexed Y - d,Y
INLINE Addr am_dpgy()
{
Byte offset = mem.getByte(bank(pbr) | pc) + y.b;
BYTES(1);
return (bank(0) | (Word)(dp.w + offset));
}
// Direct Page Indirect - (d)
INLINE Addr am_dpgi()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (bank(dbr) | mem.getWord(bank(0) | (Word)(dp.w + disp)));
}
// Direct Page Indexed Indirect - (d,x)
INLINE Addr am_dpix()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (bank(dbr) | mem.getWord(bank(0) | (Word)(dp.w + disp + x.w)));
}
// Direct Page Indirect Indexed - (d),Y
INLINE Addr am_dpiy()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (bank(dbr) | mem.getWord(bank(0) | (dp.w + disp)) + y.w);
}
// Direct Page Indirect Long - [d]
INLINE Addr am_dpil()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (mem.getAddr(bank(0) | (Word)(dp.w + disp)));
}
// Direct Page Indirect Long Indexed - [d],Y
INLINE Addr am_dily()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (mem.getAddr(bank(0) | (Word)(dp.w + disp)) + y.w);
}
// Implied/Stack
INLINE Addr am_impl()
{
BYTES(0);
return (0);
}
// Accumulator
INLINE Addr am_acc()
{
BYTES(0);
return (0);
}
// Immediate Byte
INLINE Addr am_immb()
{
Addr ea = bank(pbr) | pc;
BYTES(1);
return (ea);
}
// Immediate Word
INLINE Addr am_immw()
{
Addr ea = bank(pbr) | pc;
BYTES(2);
return (ea);
}
// Immediate based on size of A/M
INLINE Addr am_immm()
{
Addr ea = bank(pbr) | pc;
unsigned int size = (e || p.f_m) ? 1 : 2;
BYTES(size);
return (ea);
}
// Immediate based on size of X/Y
INLINE Addr am_immx()
{
Addr ea = bank(pbr) | pc;
unsigned int size = (e || p.f_x) ? 1 : 2;
BYTES(size);
return (ea);
}
// Long Relative - d
INLINE Addr am_lrel()
{
Word disp = mem.getWord(bank(pbr) | pc);
BYTES(2);
return (bank(pbr) | (Word)(pc + (signed short)disp));
}
// Relative - d
INLINE Addr am_rela()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
return (bank(pbr) | (Word)(pc + (signed char)disp));
}
// Stack Relative - d,S
INLINE Addr am_srel()
{
Byte disp = mem.getByte(bank(pbr) | pc);
BYTES(1);
if (e)
return((bank(0) | join(sp.b + disp, hi(sp.w))));
else
return (bank(0) | (Word)(sp.w + disp));
}
// Stack Relative Indirect Indexed Y - (d,S),Y
INLINE Addr am_sriy()
{
Byte disp = mem.getByte(bank(pbr) | pc);
register Word ia;
BYTES(1);
if (e)
ia = mem.getWord(join(sp.b + disp, hi(sp.w)));
else
ia = mem.getWord(bank(0) | (sp.w + disp));
return (bank(dbr) | (Word)(ia + y.w));
}
// Set the Negative flag
INLINE void setn(unsigned int flag)
{
p.f_n = flag ? 1 : 0;
}
// Set the Overflow flag
INLINE void setv(unsigned int flag)
{
p.f_v = flag ? 1 : 0;
}
// Set the decimal flag
INLINE void setd(unsigned int flag)
{
p.f_d = flag ? 1 : 0;
}
// Set the Interrupt Disable flag
INLINE void seti(unsigned int flag)
{
p.f_i = flag ? 1 : 0;
}
// Set the Zero flag
INLINE void setz(unsigned int flag)
{
p.f_z = flag ? 1 : 0;
}
// Set the Carry flag
INLINE void setc(unsigned int flag)
{
p.f_c = flag ? 1 : 0;
}
// Set the Negative and Zero flags from a byte value
INLINE void setnz_b(Byte value)
{
setn(value & 0x80);
setz(value == 0);
}
// Set the Negative and Zero flags from a word value
INLINE void setnz_w(Word value)
{
setn(value & 0x8000);
setz(value == 0);
}
INLINE void op_adc(Addr ea)
{
TRACE("ADC");
if (e || p.f_m) {
Byte data = mem.getByte(ea);
Word temp = a.b + data + p.f_c;
setc(temp & 0x100);
setv((~(a.b ^ data)) & (a.b ^ temp) & 0x80);
setnz_b(a.b = lo(temp));
}
else {
Word data = mem.getWord(ea);
int temp = a.w + data + p.f_c;
setc(temp & 0x100);
setv((~(a.w ^ data)) & (a.w ^ temp) & 0x8000);
setnz_w(a.w = (Word)temp);
}
}
INLINE void op_and(Addr ea)
{
TRACE("AND");
if (e || p.f_m)
setnz_b(a.b &= mem.getByte(ea));
else
setnz_w(a.w &= mem.getWord(ea));
}
INLINE void op_asl(Addr ea)
{
TRACE("ASL");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
setc(data & 0x80);
setnz_b(data <<= 1);
mem.setByte(ea, data);
}
else {
register Word data = mem.getWord(ea);
setc(data & 0x8000);
setnz_w(data <<= 1);
mem.setWord(ea, data);
}
}
INLINE void op_asla(Addr ea)
{
TRACE("ASL");
if (e || p.f_m) {
setc(a.b & 0x80);
setnz_b(a.b <<= 1);
mem.setByte(ea, a.b);
}
else {
setc(a.w & 0x8000);
setnz_w(a.w <<= 1);
mem.setWord(ea, a.w);
}
}
INLINE void op_bcc(Addr ea)
{
TRACE("BCC");
if (p.f_c == 0)
pc = (Word)ea;
}
INLINE void op_bcs(Addr ea)
{
TRACE("BCS");
if (p.f_c == 1)
pc = (Word)ea;
}
INLINE void op_beq(Addr ea)
{
TRACE("BEQ");
if (p.f_z == 1)
pc = (Word)ea;
}
INLINE void op_bit(Addr ea)
{
TRACE("BIT");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
setz((a.b & data) == 0);
setn(data & 0x80);
setv(data & 0x40);
}
else {
register Word data = mem.getWord(ea);
setz((a.w & data) == 0);
setn(data & 0x8000);
setv(data & 0x4000);
}
}
INLINE void op_biti(Addr ea)
{
TRACE("BIT");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
setz((a.b & data) == 0);
}
else {
register Word data = mem.getWord(ea);
setz((a.w & data) == 0);
}
}
INLINE void op_bmi(Addr ea)
{
TRACE("BMI");
if (p.f_n == 1)
pc = (Word)ea;
}
INLINE void op_bne(Addr ea)
{
TRACE("BNE");
if (p.f_z == 0)
pc = (Word)ea;
}
INLINE void op_bpl(Addr ea)
{
TRACE("BPL");
if (p.f_n == 0)
pc = (Word)ea;
}
INLINE void op_bra(Addr ea)
{
TRACE("BRA");
pc = (Word)ea;
}
INLINE void op_brk(Addr ea)
{
TRACE("BRK");
if (e) {
pushWord(pc);
pushByte(p.b | 0x10);
p.f_i = 1;
p.f_d = 0;
pbr = 0;
pc = mem.getWord(0xfffe);
}
else {
pushByte(pbr);
pushWord(pc);
pushByte(p.b);
p.f_i = 1;
p.f_d = 0;
pbr = 0;
pc = mem.getWord(0xffe6);
}
}
INLINE void op_brl(Addr ea)
{
TRACE("BRL");
pc = (Word)ea;
}
INLINE void op_bvc(Addr ea)
{
TRACE("BVC");
if (p.f_v == 0)
pc = (Word)ea;
}
INLINE void op_bvs(Addr ea)
{
TRACE("BVS");
if (p.f_v == 1)
pc = (Word)ea;
}
INLINE void op_clc(Addr ea)
{
TRACE("CLC");
setc(0);
}
INLINE void op_cld(Addr ea)
{
TRACE("CLD")
setd(0);
}
INLINE void op_cli(Addr ea)
{
TRACE("CLI")
seti(0);
}
INLINE void op_clv(Addr ea)
{
TRACE("CLD")
setv(0);
}
INLINE void op_cmp(Addr ea)
{
TRACE("CMP");
if (e || p.f_m) {
Byte data = mem.getByte(ea);
Word temp = a.b - data;
setc(temp & 0x100);
setnz_b(lo(temp));
}
else {
Word data = mem.getWord(ea);
Addr temp = a.w - data;
setc(temp & 0x10000L);
setnz_w((Word)temp);
}
}
INLINE void op_cop(Addr ea)
{
TRACE("COP");
if (e) {
pushWord(pc);
pushByte(p.b);
p.f_i = 1;
p.f_d = 0;
pbr = 0;
pc = mem.getWord(0xfff4);
}
else {
pushByte(pbr);
pushWord(pc);
pushByte(p.b);
p.f_i = 1;
p.f_d = 0;
pbr = 0;
pc = mem.getWord(0xffe4);
}
}
INLINE void op_cpx(Addr ea)
{
TRACE("CPX");
if (e || p.f_x) {
Byte data = mem.getByte(ea);
setnz_b(x.b - data);
setc(x.b >= data);
}
else {
Word data = mem.getWord(ea);
setnz_w(x.w - data);
setc(x.w >= data);
}
}
INLINE void op_cpy(Addr ea)
{
TRACE("CPY");
if (e || p.f_x) {
Byte data = mem.getByte(ea);
setnz_b(y.b - data);
setc(y.b >= data);
}
else {
Word data = mem.getWord(ea);
setnz_w(y.w - data);
setc(y.w >= data);
}
}
INLINE void op_dec(Addr ea)
{
TRACE("DEC");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
mem.setByte(ea, ++data);
setnz_b(data);
}
else {
register Word data = mem.getWord(ea);
mem.setWord(ea, ++data);
setnz_w(data);
}
}
INLINE void op_deca(Addr ea)
{
TRACE("DEC");
if (e || p.f_m)
setnz_b(--a.b);
else
setnz_w(--a.w);
}
INLINE void op_dex(Addr ea)
{
TRACE("DEX");
if (e || p.f_x)
setnz_b(x.b -= 1);
else
setnz_w(x.w -= 1);
}
INLINE void op_dey(Addr ea)
{
TRACE("DEY");
if (e || p.f_x)
setnz_b(y.b -= 1);
else
setnz_w(y.w -= 1);
}
INLINE void op_eor(Addr ea)
{
TRACE("EOR");
if (e || p.f_m)
setnz_b(a.b ^= mem.getByte(ea));
else
setnz_w(a.w ^= mem.getWord(ea));
}
INLINE void op_inc(Addr ea)
{
TRACE("INC");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
mem.setByte(ea, ++data);
setnz_b(data);
}
else {
register Word data = mem.getWord(ea);
mem.setWord(ea, ++data);
setnz_w(data);
}
}
INLINE void op_inca(Addr ea)
{
TRACE("INC");
if (e || p.f_m)
setnz_b(++a.b);
else
setnz_w(++a.w);
}
INLINE void op_inx(Addr ea)
{
TRACE("INX");
if (e || p.f_x)
setnz_b(++x.b);
else
setnz_w(++x.w);
}
INLINE void op_iny(Addr ea)
{
TRACE("INY");
if (e || p.f_x)
setnz_b(++y.b);
else
setnz_w(++y.w);
}
INLINE void op_jmp(Addr ea)
{
TRACE("JMP");
pbr = lo(ea >> 16);
pc = (Word)ea;
}
INLINE void op_jsl(Addr ea)
{
TRACE("JSL");
pushByte(pbr);
pushWord(pc - 1);
pbr = lo(ea >> 16);
pc = (Word)ea;
}
INLINE void op_jsr(Addr ea)
{
TRACE("JSR");
pushWord(pc - 1);
pc = (Word)ea;
}
INLINE void op_lda(Addr ea)
{
TRACE("LDA");
if (e || p.f_m)
setnz_b(a.b = mem.getByte(ea));
else
setnz_w(a.w = mem.getWord(ea));
}
INLINE void op_ldx(Addr ea)
{
TRACE("LDX");
if (e || p.f_x)
setnz_b(lo(x.w = mem.getByte(ea)));
else
setnz_w(x.w = mem.getWord(ea));
}
INLINE void op_ldy(Addr ea)
{
TRACE("LDY");
if (e || p.f_x)
setnz_b(lo(y.w = mem.getByte(ea)));
else
setnz_w(y.w = mem.getWord(ea));
}
INLINE void op_lsr(Addr ea)
{
TRACE("LSR");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
setc(data & 0x01);
setnz_b(data >>= 1);
mem.setByte(ea, data);
}
else {
register Word data = mem.getWord(ea);
setc(data & 0x0001);
setnz_w(data >>= 1);
mem.setWord(ea, data);
}
}
INLINE void op_lsra(Addr ea)
{
TRACE("LSR");
if (e || p.f_m) {
setc(a.b & 0x01);
setnz_b(a.b >>= 1);
mem.setByte(ea, a.b);
}
else {
setc(a.w & 0x0001);
setnz_w(a.w >>= 1);
mem.setWord(ea, a.w);
}
}
INLINE void op_mvn(Addr ea)
{
TRACE("MVN");
}
INLINE void op_mvp(Addr ea)
{
TRACE("MVP");
}
INLINE void op_nop(Addr ea)
{
TRACE("NOP");
}
INLINE void op_ora(Addr ea)
{
TRACE("ORA");
if (e || p.f_m)
setnz_b(a.b |= mem.getByte(ea));
else
setnz_w(a.w |= mem.getWord(ea));
}
INLINE void op_pea(Addr ea)
{
TRACE("PEA");
pushWord(mem.getWord(ea));
}
INLINE void op_pei(Addr ea)
{
TRACE("PEI");
}
INLINE void op_per(Addr ea)
{
TRACE("PER");
}
INLINE void op_pha(Addr ea)
{
TRACE("PHA");
if (e || p.f_m)
pushByte(a.b);
else
pushWord(a.w);
}
INLINE void op_phb(Addr ea)
{
TRACE("PHB");
pushByte(dbr);
}
INLINE void op_phd(Addr ea)
{
TRACE("PHD");
pushWord(dp.w);
}
INLINE void op_phk(Addr ea)
{
TRACE("PHK");
pushByte(pbr);
}
INLINE void op_php(Addr ea)
{
TRACE("PHP");
pushByte(p.b);
}
INLINE void op_phx(Addr ea)
{
TRACE("PHX");
if (e || p.f_x)
pushByte(x.b);
else
pushWord(x.w);
}
INLINE void op_phy(Addr ea)
{
TRACE("PHY");
if (e || p.f_x)
pushByte(y.b);
else
pushWord(y.w);
}
INLINE void op_pla(Addr ea)
{
TRACE("PLA");
if (e || p.f_m)
setnz_b(a.b = pullByte());
else
setnz_w(a.w = pullWord());
}
INLINE void op_plb(Addr ea)
{
TRACE("PLB");
setnz_b(dbr = pullByte());
}
INLINE void op_pld(Addr ea)
{
TRACE("PLD");
setnz_w(dp.w = pullWord());
}
INLINE void op_plk(Addr ea)
{
TRACE("PLK");
setnz_b(dbr = pullByte());
}
INLINE void op_plp(Addr ea)
{
TRACE("PLP");
if (e)
p.b = pullByte() | 0x30;
else {
p.b = pullByte();
if (p.f_x) {
x.w = x.b;
y.w = y.b;
}
}
}
INLINE void op_plx(Addr ea)
{
TRACE("PLX");
if (e || p.f_x)
setnz_b(lo(x.w = pullByte()));
else
setnz_w(x.w = pullWord());
}
INLINE void op_ply(Addr ea)
{
TRACE("PLY");
if (e || p.f_x)
setnz_b(lo(y.w = pullByte()));
else
setnz_w(y.w = pullWord());
}
INLINE void op_rep(Addr ea)
{
TRACE("REP");
p.b &= ~mem.getByte(ea);
if (e) p.f_m = p.f_x = 1;
}
INLINE void op_rol(Addr ea)
{
TRACE("ROL");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
register Byte carry = p.f_c ? 0x01 : 0x00;
setc(data & 0x80);
setnz_b(data = (data << 1) | carry);
mem.setByte(ea, data);
}
else {
register Word data = mem.getWord(ea);
register Word carry = p.f_c ? 0x0001 : 0x0000;
setc(data & 0x8000);
setnz_w(data = (data << 1) | carry);
mem.setWord(ea, data);
}
}
INLINE void op_rola(Addr ea)
{
TRACE("ROL");
if (e || p.f_m) {
register Byte carry = p.f_c ? 0x01 : 0x00;
setc(a.b & 0x80);
setnz_b(a.b = (a.b << 1) | carry);
mem.setByte(ea, a.b);
}
else {
register Word carry = p.f_c ? 0x0001 : 0x0000;
setc(a.w & 0x8000);
setnz_w(a.w = (a.w << 1) | carry);
mem.setWord(ea, a.w);
}
}
INLINE void op_ror(Addr ea)
{
TRACE("ROR");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
register Byte carry = p.f_c ? 0x80 : 0x00;
setc(data & 0x80);
setnz_b(data = (data >> 1) | carry);
mem.setByte(ea, data);
}
else {
register Word data = mem.getWord(ea);
register Word carry = p.f_c ? 0x8000 : 0x0000;
setc(data & 0x8000);
setnz_w(data = (data >> 1) | carry);
mem.setWord(ea, data);
}
}
INLINE void op_rora(Addr ea)
{
TRACE("ROR");
if (e || p.f_m) {
register Byte carry = p.f_c ? 0x80 : 0x00;
setc(a.b & 0x80);
setnz_b(a.b = (a.b >> 1) | carry);
mem.setByte(ea, a.b);
}
else {
register Word carry = p.f_c ? 0x8000 : 0x0000;
setc(a.w & 0x8000);
setnz_w(a.w = (a.w >> 1) | carry);
mem.setWord(ea, a.w);
}
}
INLINE void op_rtl(Addr ea)
{
TRACE("RTL");
pc = pullWord();
pbr = pullByte();
}
INLINE void op_rti(Addr ea)
{
TRACE("RTI");
if (e) {
p.b = pullByte();
pc = pullWord();
}
else {
p.b = pullByte();
pc = pullWord();
pbr = pullByte();
}
p.f_i = 0;
}
INLINE void op_rts(Addr ea)
{
TRACE("RTS");
pc = pullWord() + 1;
}
INLINE void op_sbc(Addr ea)
{
TRACE("SBC");
if (e || p.f_m) {
Byte data = ~mem.getByte(ea);
Word temp = a.b + data + p.f_c;
setc(temp & 0x100);
setv((~(a.b ^ data)) & (a.b ^ temp) & 0x80);
setnz_b(a.b = lo(temp));
}
else {
Word data = ~mem.getWord(ea);
int temp = a.w + data + p.f_c;
setc(temp & 0x100);
setv((~(a.w ^ data)) & (a.w ^ temp) & 0x8000);
setnz_w(a.w = (Word)temp);
}
}
INLINE void op_sec(Addr ea)
{
TRACE("SEC");
setc(1);
}
INLINE void op_sed(Addr ea)
{
TRACE("SED");
setd(1);
}
INLINE void op_sei(Addr ea)
{
TRACE("SEI");
seti(1);
}
INLINE void op_sep(Addr ea)
{
TRACE("SEP");
p.b |= mem.getByte(ea);
if (e) p.f_m = p.f_x = 1;
if (p.f_x) {
x.w = x.b;
y.w = y.b;
}
}
INLINE void op_sta(Addr ea)
{
TRACE("STA");
if (e || p.f_m)
mem.setByte(ea, a.b);
else
mem.setWord(ea, a.w);
}
INLINE void op_stp(Addr ea)
{
TRACE("STP");
if (!interrupted) {
pc -= 1;
}
else
interrupted = false;
}
INLINE void op_stx(Addr ea)
{
TRACE("STX");
if (e || p.f_x)
mem.setByte(ea, x.b);
else
mem.setWord(ea, x.w);
}
INLINE void op_sty(Addr ea)
{
TRACE("STY");
if (e || p.f_x)
mem.setByte(ea, y.b);
else
mem.setWord(ea, y.w);
}
INLINE void op_stz(Addr ea)
{
TRACE("STZ");
if (e || p.f_m)
mem.setByte(ea, 0);
else
mem.setWord(ea, 0);
}
INLINE void op_tax(Addr ea)
{
TRACE("TAX");
if (e || p.f_x)
setnz_b(lo(x.w = a.b));
else
setnz_w(x.w = a.w);
}
INLINE void op_tay(Addr ea)
{
TRACE("TAY");
if (e || p.f_x)
setnz_b(lo(y.w = a.b));
else
setnz_w(y.w = a.w);
}
INLINE void op_tcd(Addr ea)
{
TRACE("TCD");
dp.w = a.w;
}
INLINE void op_tdc(Addr ea)
{
TRACE("TDC");
if (e || p.f_m)
setnz_b(lo(a.w = dp.w));
else
setnz_w(a.w = dp.w);
}
INLINE void op_tcs(Addr ea)
{
TRACE("TCS");
sp.w = e ? (0x0100 | a.b) : a.w;
}
INLINE void op_trb(Addr ea)
{
TRACE("TRB");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
mem.setByte(ea, data & ~a.b);
setz((a.b & data) == 0);
}
else {
register Word data = mem.getWord(ea);
mem.setWord(ea, data & ~a.w);
setz((a.w & data) == 0);
}
}
INLINE void op_tsb(Addr ea)
{
TRACE("TSB");
if (e || p.f_m) {
register Byte data = mem.getByte(ea);
mem.setByte(ea, data | a.b);
setz((a.b & data) == 0);
}
else {
register Word data = mem.getWord(ea);
mem.setWord(ea, data | a.w);
setz((a.w & data) == 0);
}
}
INLINE void op_tsc(Addr ea)
{
TRACE("TSC");
if (e || p.f_m)
setnz_b(lo(a.w = sp.w));
else
setnz_w(a.w = sp.w);
}
INLINE void op_tsx(Addr ea)
{
TRACE("TSX");
}
INLINE void op_txa(Addr ea)
{
TRACE("TXA");
}
INLINE void op_txs(Addr ea)
{
TRACE("TXS");
}
INLINE void op_txy(Addr ea)
{
TRACE("TXY");
if (e || p.f_x)
setnz_b(lo(y.w = x.w));
else
setnz_w(y.w = x.w);
}
INLINE void op_tya(Addr ea)
{
TRACE("TYA");
if (e || p.f_m)
setnz_b(a.b = y.b);
else
setnz_w(a.w = p.f_x ? y.b : y.w);
}
INLINE void op_tyx(Addr ea)
{
TRACE("TYX");
if (e || p.f_x)
setnz_b(lo(x.w = y.w));
else
setnz_w(x.w = y.w);
}
INLINE void op_wai(Addr ea)
{
TRACE("WAI");
if (!interrupted) {
pc -= 1;
}
else
interrupted = false;
}
INLINE void op_wdm(Addr ea)
{
TRACE("WDM");
switch (mem.getByte(ea)) {
case 0xff: exit(0);
}
}
INLINE void op_xba(Addr ea)
{
TRACE("XBA");
a.w = swap(a.w);
setnz_b(a.b);
}
INLINE void op_xce(Addr ea)
{
TRACE("XCE");
unsigned char oe = e;
e = p.f_c;
p.f_c = oe;
if (e) {
sp.w = 0x0100 | sp.b;
dp.w = 0x0000;
}
}
};
#endif
Reference in New Issue View Git Blame Copy Permalink