forked from sin365/AxibugEmuOnline
1833 lines
72 KiB
C++
1833 lines
72 KiB
C++
/*----------------------------------------------------------------------*/
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/* */
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/* 6502 CPU Core v0.00 */
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/* Norix */
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/* written 2000/12/23 */
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/* last modify ----/--/-- */
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/*----------------------------------------------------------------------*/
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/*--------------[ INCLUDE ]-------------------------------*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <stdio.h>
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#include "VirtuaNESres.h"
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#include "typedef.h"
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#include "macro.h"
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#include "DebugOut.h"
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#include "App.h"
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#include "Config.h"
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#include "nes.h"
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#include "mmu.h"
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#include "cpu.h"
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#include "ppu.h"
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#include "apu.h"
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#include "rom.h"
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#include "mapper.h"
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/*--------------[ DEFINE ]-------------------------------*/
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#define DPCM_SYNCCLOCK FALSE
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/*--------------[ EXTERNAL PROGRAM ]-------------------------------*/
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/*--------------[ EXTERNAL WORK ]-------------------------------*/
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/*--------------[ WORK ]-------------------------------*/
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/*--------------[ CONST ]-------------------------------*/
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/*--------------[ PROTOTYPE ]-------------------------------*/
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/*--------------[ PROGRAM ]-------------------------------*/
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// オペコード
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//#define OP6502(A) RD6502((A))
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//#define OP6502W(A) RD6502W((A))
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// ゼロページリード
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#define ZPRD(A) (RAM[(BYTE)(A)])
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//#define ZPRDW(A) (*((LPWORD)&RAM[(BYTE)(A)]))
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#define ZPRDW(A) ((WORD)RAM[(BYTE)(A)]+((WORD)RAM[(BYTE)((A)+1)]<<8))
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#define ZPWR(A,V) { RAM[(BYTE)(A)]=(V); }
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#define ZPWRW(A,V) { *((LPWORD)&RAM[(BYTE)(A)])=(WORD)(V); }
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// サイクルカウンタ
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#define ADD_CYCLE(V) { exec_cycles += (V); }
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//#define ADD_CYCLE(V) {}
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// EFFECTIVE ADDRESSページ境界超えチェック
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#define CHECK_EA() { if( (ET&0xFF00) != (EA&0xFF00) ) ADD_CYCLE(1); }
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//#define CHECK_EA() { if( (R.PC&0xFF00) != (EA&0xFF00) ) ADD_CYCLE(1); }
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//#define CHECK_EA() {}
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// フラグ操作
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// ゼロ／ネガティブフラグのチェックと設定
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#define SET_ZN_FLAG(A) { R.P &= ~(Z_FLAG|N_FLAG); R.P |= ZN_Table[(BYTE)(A)]; }
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// フラグセット
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#define SET_FLAG(V) { R.P |= (V); }
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// フラグクリア
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#define CLR_FLAG(V) { R.P &= ~(V); }
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// フラグテスト＆セット／クリア
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#define TST_FLAG(F,V) { R.P &= ~(V); if((F)) R.P |= (V); }
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// フラグチェック
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#define CHK_FLAG(V) (R.P&(V))
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// WT .... WORD TEMP
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// EA .... EFFECTIVE ADDRESS
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// ET .... EFFECTIVE ADDRESS TEMP
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// DT .... DATA
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#define MR_IM() { \
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DT = OP6502( R.PC++ ); \
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}
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#define MR_ZP() { \
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EA = OP6502( R.PC++ ); \
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DT = ZPRD( EA ); \
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}
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#define MR_ZX() { \
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DT = OP6502( R.PC++ ); \
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EA = (BYTE)(DT + R.X); \
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DT = ZPRD( EA ); \
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}
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#define MR_ZY() { \
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DT = OP6502( R.PC++ ); \
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EA = (BYTE)(DT + R.Y); \
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DT = ZPRD( EA ); \
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}
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#define MR_AB() { \
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EA = OP6502W( R.PC ); \
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R.PC += 2; \
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DT = RD6502( EA ); \
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}
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#define MR_AX() { \
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ET = OP6502W( R.PC ); \
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R.PC += 2; \
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EA = ET + R.X; \
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DT = RD6502( EA ); \
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}
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#define MR_AY() { \
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ET = OP6502W( R.PC ); \
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R.PC += 2; \
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EA = ET + R.Y; \
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DT = RD6502( EA ); \
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}
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#define MR_IX() { \
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DT = OP6502( R.PC++ ); \
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EA = ZPRDW( DT + R.X ); \
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DT = RD6502( EA ); \
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}
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#define MR_IY() { \
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DT = OP6502( R.PC++ ); \
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ET = ZPRDW( DT ); \
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EA = ET + R.Y; \
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DT = RD6502( EA ); \
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}
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// EFFECTIVE ADDRESS
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#define EA_ZP() { \
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EA = OP6502( R.PC++ ); \
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}
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#define EA_ZX() { \
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DT = OP6502( R.PC++ ); \
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EA = (BYTE)(DT + R.X); \
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}
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#define EA_ZY() { \
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DT = OP6502( R.PC++ ); \
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EA = (BYTE)(DT + R.Y); \
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}
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#define EA_AB() { \
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EA = OP6502W( R.PC ); \
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R.PC += 2; \
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}
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#define EA_AX() { \
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ET = OP6502W( R.PC ); \
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R.PC += 2; \
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EA = ET + R.X; \
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}
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#define EA_AY() { \
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ET = OP6502W( R.PC ); \
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R.PC += 2; \
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EA = ET + R.Y; \
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}
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#define EA_IX() { \
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DT = OP6502( R.PC++ ); \
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EA = ZPRDW( DT + R.X ); \
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}
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#define EA_IY() { \
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DT = OP6502( R.PC++ ); \
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ET = ZPRDW( DT ); \
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EA = ET + (WORD)R.Y; \
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}
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// メモリライト
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#define MW_ZP() ZPWR(EA,DT)
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#define MW_EA() WR6502(EA,DT)
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// STACK操作
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#define PUSH(V) { STACK[(R.S--)&0xFF]=(V); }
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#define POP() STACK[(++R.S)&0xFF]
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// 算術演算系
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/* ADC (NV----ZC) */
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#define ADC() { \
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WT = R.A+DT+(R.P&C_FLAG); \
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TST_FLAG( WT > 0xFF, C_FLAG ); \
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TST_FLAG( ((~(R.A^DT))&(R.A^WT)&0x80), V_FLAG ); \
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R.A = (BYTE)WT; \
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SET_ZN_FLAG(R.A); \
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}
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/* SBC (NV----ZC) */
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#define SBC() { \
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WT = R.A-DT-(~R.P&C_FLAG); \
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TST_FLAG( ((R.A^DT) & (R.A^WT)&0x80), V_FLAG ); \
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TST_FLAG( WT < 0x100, C_FLAG ); \
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R.A = (BYTE)WT; \
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SET_ZN_FLAG(R.A); \
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}
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/* INC (N-----Z-) */
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#define INC() { \
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DT++; \
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SET_ZN_FLAG(DT); \
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}
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/* INX (N-----Z-) */
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#define INX() { \
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R.X++; \
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SET_ZN_FLAG(R.X); \
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}
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/* INY (N-----Z-) */
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#define INY() { \
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R.Y++; \
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SET_ZN_FLAG(R.Y); \
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}
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/* DEC (N-----Z-) */
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#define DEC() { \
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DT--; \
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SET_ZN_FLAG(DT); \
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}
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/* DEX (N-----Z-) */
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#define DEX() { \
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R.X--; \
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SET_ZN_FLAG(R.X); \
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}
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/* DEY (N-----Z-) */
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#define DEY() { \
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R.Y--; \
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SET_ZN_FLAG(R.Y); \
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}
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// 論理演算系
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/* AND (N-----Z-) */
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#define AND() { \
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R.A &= DT; \
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SET_ZN_FLAG(R.A); \
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}
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/* ORA (N-----Z-) */
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#define ORA() { \
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R.A |= DT; \
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SET_ZN_FLAG(R.A); \
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}
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/* EOR (N-----Z-) */
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#define EOR() { \
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R.A ^= DT; \
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SET_ZN_FLAG(R.A); \
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}
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/* ASL_A (N-----ZC) */
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#define ASL_A() { \
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TST_FLAG( R.A&0x80, C_FLAG ); \
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R.A <<= 1; \
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SET_ZN_FLAG(R.A); \
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}
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/* ASL (N-----ZC) */
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#define ASL() { \
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TST_FLAG( DT&0x80, C_FLAG ); \
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DT <<= 1; \
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SET_ZN_FLAG(DT); \
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}
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/* LSR_A (N-----ZC) */
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#define LSR_A() { \
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TST_FLAG( R.A&0x01, C_FLAG ); \
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R.A >>= 1; \
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SET_ZN_FLAG(R.A); \
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}
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/* LSR (N-----ZC) */
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#define LSR() { \
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TST_FLAG( DT&0x01, C_FLAG ); \
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DT >>= 1; \
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SET_ZN_FLAG(DT); \
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}
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/* ROL_A (N-----ZC) */
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#define ROL_A() { \
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if( R.P & C_FLAG ) { \
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TST_FLAG(R.A&0x80,C_FLAG); \
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R.A = (R.A<<1)|0x01; \
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} else { \
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TST_FLAG(R.A&0x80,C_FLAG); \
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R.A <<= 1; \
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} \
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SET_ZN_FLAG(R.A); \
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}
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/* ROL (N-----ZC) */
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#define ROL() { \
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if( R.P & C_FLAG ) { \
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TST_FLAG(DT&0x80,C_FLAG); \
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DT = (DT<<1)|0x01; \
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} else { \
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TST_FLAG(DT&0x80,C_FLAG); \
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DT <<= 1; \
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} \
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SET_ZN_FLAG(DT); \
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}
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/* ROR_A (N-----ZC) */
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#define ROR_A() { \
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if( R.P & C_FLAG ) { \
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TST_FLAG(R.A&0x01,C_FLAG); \
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R.A = (R.A>>1)|0x80; \
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} else { \
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TST_FLAG(R.A&0x01,C_FLAG); \
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R.A >>= 1; \
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} \
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SET_ZN_FLAG(R.A); \
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}
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/* ROR (N-----ZC) */
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#define ROR() { \
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if( R.P & C_FLAG ) { \
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TST_FLAG(DT&0x01,C_FLAG); \
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DT = (DT>>1)|0x80; \
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} else { \
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TST_FLAG(DT&0x01,C_FLAG); \
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DT >>= 1; \
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} \
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SET_ZN_FLAG(DT); \
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}
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/* BIT (NV----Z-) */
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#define BIT() { \
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TST_FLAG( (DT&R.A)==0, Z_FLAG ); \
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TST_FLAG( DT&0x80, N_FLAG ); \
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TST_FLAG( DT&0x40, V_FLAG ); \
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}
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// ロード／ストア系
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/* LDA (N-----Z-) */
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#define LDA() { R.A = DT; SET_ZN_FLAG(R.A); }
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/* LDX (N-----Z-) */
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#define LDX() { R.X = DT; SET_ZN_FLAG(R.X); }
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/* LDY (N-----Z-) */
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#define LDY() { R.Y = DT; SET_ZN_FLAG(R.Y); }
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/* STA (--------) */
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#define STA() { DT = R.A; }
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/* STX (--------) */
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#define STX() { DT = R.X; }
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/* STY (--------) */
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#define STY() { DT = R.Y; }
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/* TAX (N-----Z-) */
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#define TAX() { R.X = R.A; SET_ZN_FLAG(R.X); }
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/* TXA (N-----Z-) */
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#define TXA() { R.A = R.X; SET_ZN_FLAG(R.A); }
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/* TAY (N-----Z-) */
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#define TAY() { R.Y = R.A; SET_ZN_FLAG(R.Y); }
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/* TYA (N-----Z-) */
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#define TYA() { R.A = R.Y; SET_ZN_FLAG(R.A); }
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/* TSX (N-----Z-) */
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#define TSX() { R.X = R.S; SET_ZN_FLAG(R.X); }
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/* TXS (--------) */
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#define TXS() { R.S = R.X; }
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// 比較系
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/* CMP (N-----ZC) */
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#define CMP_() { \
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WT = (WORD)R.A - (WORD)DT; \
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TST_FLAG( (WT&0x8000)==0, C_FLAG ); \
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SET_ZN_FLAG( (BYTE)WT ); \
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}
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/* CPX (N-----ZC) */
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#define CPX() { \
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WT = (WORD)R.X - (WORD)DT; \
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TST_FLAG( (WT&0x8000)==0, C_FLAG ); \
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SET_ZN_FLAG( (BYTE)WT ); \
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}
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/* CPY (N-----ZC) */
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#define CPY() { \
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WT = (WORD)R.Y - (WORD)DT; \
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TST_FLAG( (WT&0x8000)==0, C_FLAG ); \
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SET_ZN_FLAG( (BYTE)WT ); \
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}
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// ジャンプ／リターン系
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#if 1
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#define JMP_ID() { \
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WT = OP6502W(R.PC); \
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EA = RD6502(WT); \
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WT = (WT&0xFF00)|((WT+1)&0x00FF); \
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R.PC = EA+RD6502(WT)*0x100; \
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}
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#else
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#define JMP_ID() { \
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ET = OP6502W(R.PC); \
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EA = RD6502W(ET); \
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R.PC = EA; \
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}
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#endif
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#define JMP() { \
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R.PC = OP6502W( R.PC ); \
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}
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#define JSR() { \
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EA = OP6502W( R.PC ); \
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R.PC++; \
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PUSH( R.PC>>8 ); \
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PUSH( R.PC&0xFF ); \
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R.PC = EA; \
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}
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#define RTS() { \
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R.PC = POP(); \
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R.PC |= POP()*0x0100; \
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R.PC++; \
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}
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#define RTI() { \
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R.P = POP() | R_FLAG; \
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R.PC = POP(); \
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R.PC |= POP()*0x0100; \
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}
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#define _NMI() { \
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PUSH( R.PC>>8 ); \
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PUSH( R.PC&0xFF ); \
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CLR_FLAG( B_FLAG ); \
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PUSH( R.P ); \
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SET_FLAG( I_FLAG ); \
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R.PC = RD6502W(NMI_VECTOR); \
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exec_cycles += 7; \
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}
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#define _IRQ() { \
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PUSH( R.PC>>8 ); \
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PUSH( R.PC&0xFF ); \
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CLR_FLAG( B_FLAG ); \
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PUSH( R.P ); \
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SET_FLAG( I_FLAG ); \
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R.PC = RD6502W(IRQ_VECTOR); \
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exec_cycles += 7; \
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}
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#define BRK() { \
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R.PC++; \
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PUSH( R.PC>>8 ); \
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PUSH( R.PC&0xFF ); \
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SET_FLAG( B_FLAG ); \
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PUSH( R.P ); \
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SET_FLAG( I_FLAG ); \
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R.PC = RD6502W(IRQ_VECTOR); \
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}
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#if 1
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#define REL_JUMP() { \
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ET = R.PC; \
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EA = R.PC + (SBYTE)DT; \
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R.PC = EA; \
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ADD_CYCLE(1); \
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CHECK_EA(); \
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}
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#else
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#define REL_JUMP() { \
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R.PC = R.PC + (SBYTE)DT; \
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ADD_CYCLE(1); \
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}
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#endif
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#define BCC() { if( !(R.P & C_FLAG) ) REL_JUMP(); }
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#define BCS() { if( (R.P & C_FLAG) ) REL_JUMP(); }
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#define BNE() { if( !(R.P & Z_FLAG) ) REL_JUMP(); }
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#define BEQ() { if( (R.P & Z_FLAG) ) REL_JUMP(); }
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#define BPL() { if( !(R.P & N_FLAG) ) REL_JUMP(); }
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#define BMI() { if( (R.P & N_FLAG) ) REL_JUMP(); }
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#define BVC() { if( !(R.P & V_FLAG) ) REL_JUMP(); }
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#define BVS() { if( (R.P & V_FLAG) ) REL_JUMP(); }
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// フラグ制御系
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#define CLC() { R.P &= ~C_FLAG; }
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#define CLD() { R.P &= ~D_FLAG; }
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#define CLI() { R.P &= ~I_FLAG; }
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#define CLV() { R.P &= ~V_FLAG; }
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#define SEC() { R.P |= C_FLAG; }
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#define SED() { R.P |= D_FLAG; }
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#define SEI() { R.P |= I_FLAG; }
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// Unofficial命令
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#define ANC() { \
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R.A &= DT; \
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SET_ZN_FLAG( R.A ); \
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TST_FLAG( R.P&N_FLAG, C_FLAG ); \
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}
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#define ANE() { \
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R.A = (R.A|0xEE)&R.X&DT; \
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SET_ZN_FLAG( R.A ); \
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}
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#define ARR() { \
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DT &= R.A; \
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R.A = (DT>>1)|((R.P&C_FLAG)<<7); \
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SET_ZN_FLAG( R.A ); \
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TST_FLAG( R.A&0x40, C_FLAG ); \
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TST_FLAG( (R.A>>6)^(R.A>>5), V_FLAG ); \
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}
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#define ASR() { \
|
||
DT &= R.A; \
|
||
TST_FLAG( DT&0x01, C_FLAG ); \
|
||
R.A = DT>>1; \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define DCP() { \
|
||
DT--; \
|
||
CMP_(); \
|
||
}
|
||
|
||
#define DOP() { \
|
||
R.PC++; \
|
||
}
|
||
|
||
#define ISB() { \
|
||
DT++; \
|
||
SBC(); \
|
||
}
|
||
|
||
#define LAS() { \
|
||
R.A = R.X = R.S = (R.S & DT); \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define LAX() { \
|
||
R.A = DT; \
|
||
R.X = R.A; \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define LXA() { \
|
||
R.A = R.X = ((R.A|0xEE)&DT); \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define RLA() { \
|
||
if( R.P & C_FLAG ) { \
|
||
TST_FLAG( DT&0x80, C_FLAG ); \
|
||
DT = (DT<<1)|1; \
|
||
} else { \
|
||
TST_FLAG( DT&0x80, C_FLAG ); \
|
||
DT <<= 1; \
|
||
} \
|
||
R.A &= DT; \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define RRA() { \
|
||
if( R.P & C_FLAG ) { \
|
||
TST_FLAG( DT&0x01, C_FLAG ); \
|
||
DT = (DT>>1)|0x80; \
|
||
} else { \
|
||
TST_FLAG( DT&0x01, C_FLAG ); \
|
||
DT >>= 1; \
|
||
} \
|
||
ADC(); \
|
||
}
|
||
|
||
#define SAX() { \
|
||
DT = R.A & R.X; \
|
||
}
|
||
|
||
#define SBX() { \
|
||
WT = (R.A&R.X)-DT; \
|
||
TST_FLAG( WT < 0x100, C_FLAG ); \
|
||
R.X = WT&0xFF; \
|
||
SET_ZN_FLAG( R.X ); \
|
||
}
|
||
|
||
#define SHA() { \
|
||
DT = R.A & R.X & (BYTE)((EA>>8)+1); \
|
||
}
|
||
|
||
#define SHS() { \
|
||
R.S = R.A & R.X; \
|
||
DT = R.S & (BYTE)((EA>>8)+1); \
|
||
}
|
||
|
||
#define SHX() { \
|
||
DT = R.X & (BYTE)((EA>>8)+1); \
|
||
}
|
||
|
||
#define SHY() { \
|
||
DT = R.Y & (BYTE)((EA>>8)+1); \
|
||
}
|
||
|
||
#define SLO() { \
|
||
TST_FLAG( DT&0x80, C_FLAG ); \
|
||
DT <<= 1; \
|
||
R.A |= DT; \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define SRE() { \
|
||
TST_FLAG( DT&0x01, C_FLAG ); \
|
||
DT >>= 1; \
|
||
R.A ^= DT; \
|
||
SET_ZN_FLAG( R.A ); \
|
||
}
|
||
|
||
#define TOP() { \
|
||
R.PC += 2; \
|
||
}
|
||
|
||
//
|
||
// コンストラクタ/デストラクタ
|
||
//
|
||
//CPU::CPU( NES* parent )
|
||
CPU::CPU( NES* parent ) : nes(parent)
|
||
{
|
||
// nes = parent;
|
||
m_bClockProcess = FALSE;
|
||
ZEROMEMORY(&R, sizeof(R));
|
||
}
|
||
|
||
CPU::~CPU()
|
||
{
|
||
}
|
||
|
||
// メモリアクセス
|
||
//#define OP6502(A) (CPU_MEM_BANK[(A)>>13][(A)&0x1FFF])
|
||
//#define OP6502W(A) (*((WORD*)&CPU_MEM_BANK[(A)>>13][(A)&0x1FFF]))
|
||
|
||
#if 0
|
||
#define OP6502(A) RD6502((A))
|
||
#define OP6502W(A) RD6502W((A))
|
||
#else
|
||
inline BYTE OP6502( WORD addr )
|
||
{
|
||
return CPU_MEM_BANK[addr>>13][addr&0x1FFF];
|
||
}
|
||
|
||
inline WORD OP6502W( WORD addr )
|
||
{
|
||
#if 0
|
||
WORD ret;
|
||
ret = (WORD)CPU_MEM_BANK[(addr+0)>>13][(addr+0)&0x1FFF];
|
||
ret |= (WORD)CPU_MEM_BANK[(addr+1)>>13][(addr+1)&0x1FFF]<<8;
|
||
return ret;
|
||
#else
|
||
return *((WORD*)&CPU_MEM_BANK[addr>>13][addr&0x1FFF]);
|
||
#endif
|
||
}
|
||
#endif
|
||
|
||
inline BYTE CPU::RD6502( WORD addr )
|
||
{
|
||
if( addr < 0x2000 ) {
|
||
// RAM (Mirror $0800, $1000, $1800)
|
||
return RAM[addr&0x07FF];
|
||
} else if( addr < 0x8000 ) {
|
||
// Others
|
||
return nes->Read( addr );
|
||
} else {
|
||
// Dummy access
|
||
mapper->Read( addr, CPU_MEM_BANK[addr>>13][addr&0x1FFF] );
|
||
}
|
||
|
||
// Quick bank read
|
||
return CPU_MEM_BANK[addr>>13][addr&0x1FFF];
|
||
}
|
||
|
||
inline WORD CPU::RD6502W( WORD addr )
|
||
{
|
||
if( addr < 0x2000 ) {
|
||
// RAM (Mirror $0800, $1000, $1800)
|
||
return *((WORD*)&RAM[addr&0x07FF]);
|
||
} else if( addr < 0x8000 ) {
|
||
// Others
|
||
return (WORD)nes->Read(addr)+(WORD)nes->Read(addr+1)*0x100;
|
||
}
|
||
|
||
// Quick bank read
|
||
#if 0
|
||
WORD ret;
|
||
ret = (WORD)CPU_MEM_BANK[(addr+0)>>13][(addr+0)&0x1FFF];
|
||
ret |= (WORD)CPU_MEM_BANK[(addr+1)>>13][(addr+1)&0x1FFF]<<8;
|
||
return ret;
|
||
#else
|
||
return *((WORD*)&CPU_MEM_BANK[addr>>13][addr&0x1FFF]);
|
||
#endif
|
||
}
|
||
|
||
// メモリライト
|
||
inline void CPU::WR6502( WORD addr, BYTE data )
|
||
{
|
||
if( addr < 0x2000 ) {
|
||
// RAM (Mirror $0800, $1000, $1800)
|
||
RAM[addr&0x07FF] = data;
|
||
} else {
|
||
// Others
|
||
nes->Write( addr, data );
|
||
}
|
||
}
|
||
|
||
//
|
||
// リセット
|
||
//
|
||
void CPU::Reset()
|
||
{
|
||
apu = nes->apu;
|
||
mapper = nes->mapper;
|
||
|
||
R.A = 0x00;
|
||
R.X = 0x00;
|
||
R.Y = 0x00;
|
||
R.S = 0xFF;
|
||
R.P = Z_FLAG|R_FLAG;
|
||
R.PC = RD6502W(RES_VECTOR);
|
||
|
||
R.INT_pending = 0;
|
||
|
||
TOTAL_cycles = 0;
|
||
DMA_cycles = 0;
|
||
|
||
// STACK quick access
|
||
STACK = &RAM[0x0100];
|
||
|
||
// Zero/Negative FLAG
|
||
ZN_Table[0] = Z_FLAG;
|
||
for( INT i = 1; i < 256; i++ )
|
||
ZN_Table[i] = (i & 0x80)?N_FLAG:0;
|
||
}
|
||
|
||
INT CPU::GetDmaCycles()
|
||
{
|
||
return DMA_cycles;
|
||
}
|
||
|
||
void CPU::SetDmaCycles( INT cycles )
|
||
{
|
||
DMA_cycles = cycles;
|
||
}
|
||
|
||
INT CPU::GetTotalCycles()
|
||
{
|
||
return TOTAL_cycles;
|
||
}
|
||
|
||
void CPU::SetTotalCycles( INT cycles )
|
||
{
|
||
TOTAL_cycles = cycles;
|
||
}
|
||
|
||
//
|
||
// DMAペンディングサイクル設定
|
||
//
|
||
void CPU::DMA( INT cycles )
|
||
{
|
||
DMA_cycles += cycles;
|
||
}
|
||
|
||
static int nmicount;
|
||
|
||
//
|
||
// 割り込み
|
||
//
|
||
void CPU::NMI()
|
||
{
|
||
R.INT_pending |= NMI_FLAG;
|
||
nmicount = 0;
|
||
}
|
||
|
||
void CPU::SetIRQ( BYTE mask )
|
||
{
|
||
R.INT_pending |= mask;
|
||
}
|
||
|
||
void CPU::ClrIRQ( BYTE mask )
|
||
{
|
||
R.INT_pending &= ~mask;
|
||
}
|
||
|
||
//
|
||
// 命令実行
|
||
//
|
||
INT CPU::EXEC( INT request_cycles )
|
||
{
|
||
BYTE opcode; // オペコード
|
||
INT OLD_cycles = TOTAL_cycles;
|
||
INT exec_cycles = 0;
|
||
BYTE nmi_request, irq_request;
|
||
BOOL bClockProcess = m_bClockProcess;
|
||
|
||
// TEMP
|
||
WORD EA = 0;
|
||
WORD ET = 0;
|
||
WORD WT = 0;
|
||
BYTE DT = 0;
|
||
|
||
while( request_cycles > 0 ) {
|
||
exec_cycles = 0;
|
||
|
||
if( DMA_cycles ) {
|
||
if( request_cycles <= DMA_cycles ) {
|
||
DMA_cycles -= request_cycles;
|
||
TOTAL_cycles += request_cycles;
|
||
|
||
// クロック同期処理
|
||
mapper->Clock( request_cycles );
|
||
#if DPCM_SYNCCLOCK
|
||
apu->SyncDPCM( request_cycles );
|
||
#endif
|
||
if( bClockProcess ) {
|
||
nes->Clock( request_cycles );
|
||
}
|
||
// nes->Clock( request_cycles );
|
||
goto _execute_exit;
|
||
} else {
|
||
exec_cycles += DMA_cycles;
|
||
// request_cycles -= DMA_cycles;
|
||
DMA_cycles = 0;
|
||
}
|
||
}
|
||
|
||
nmi_request = irq_request = 0;
|
||
opcode = OP6502( R.PC++ );
|
||
|
||
if( R.INT_pending ) {
|
||
if( R.INT_pending & NMI_FLAG ) {
|
||
nmi_request = 0xFF;
|
||
R.INT_pending &= ~NMI_FLAG;
|
||
} else
|
||
if( R.INT_pending & IRQ_MASK ) {
|
||
R.INT_pending &= ~IRQ_TRIGGER2;
|
||
if( !(R.P & I_FLAG) && opcode != 0x40 ) {
|
||
irq_request = 0xFF;
|
||
R.INT_pending &= ~IRQ_TRIGGER;
|
||
}
|
||
}
|
||
}
|
||
|
||
switch( opcode ) {
|
||
case 0x69: // ADC #$??
|
||
MR_IM(); ADC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x65: // ADC $??
|
||
MR_ZP(); ADC();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x75: // ADC $??,X
|
||
MR_ZX(); ADC();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x6D: // ADC $????
|
||
MR_AB(); ADC();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x7D: // ADC $????,X
|
||
MR_AX(); ADC(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x79: // ADC $????,Y
|
||
MR_AY(); ADC(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x61: // ADC ($??,X)
|
||
MR_IX(); ADC();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x71: // ADC ($??),Y
|
||
MR_IY(); ADC(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0xE9: // SBC #$??
|
||
MR_IM(); SBC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xE5: // SBC $??
|
||
MR_ZP(); SBC();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xF5: // SBC $??,X
|
||
MR_ZX(); SBC();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xED: // SBC $????
|
||
MR_AB(); SBC();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xFD: // SBC $????,X
|
||
MR_AX(); SBC(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xF9: // SBC $????,Y
|
||
MR_AY(); SBC(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xE1: // SBC ($??,X)
|
||
MR_IX(); SBC();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xF1: // SBC ($??),Y
|
||
MR_IY(); SBC(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0xC6: // DEC $??
|
||
MR_ZP(); DEC(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xD6: // DEC $??,X
|
||
MR_ZX(); DEC(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xCE: // DEC $????
|
||
MR_AB(); DEC(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xDE: // DEC $????,X
|
||
MR_AX(); DEC(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0xCA: // DEX
|
||
DEX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x88: // DEY
|
||
DEY();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0xE6: // INC $??
|
||
MR_ZP(); INC(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xF6: // INC $??,X
|
||
MR_ZX(); INC(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xEE: // INC $????
|
||
MR_AB(); INC(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xFE: // INC $????,X
|
||
MR_AX(); INC(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0xE8: // INX
|
||
INX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xC8: // INY
|
||
INY();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x29: // AND #$??
|
||
MR_IM(); AND();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x25: // AND $??
|
||
MR_ZP(); AND();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x35: // AND $??,X
|
||
MR_ZX(); AND();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x2D: // AND $????
|
||
MR_AB(); AND();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x3D: // AND $????,X
|
||
MR_AX(); AND(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x39: // AND $????,Y
|
||
MR_AY(); AND(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x21: // AND ($??,X)
|
||
MR_IX(); AND();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x31: // AND ($??),Y
|
||
MR_IY(); AND(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x0A: // ASL A
|
||
ASL_A();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x06: // ASL $??
|
||
MR_ZP(); ASL(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x16: // ASL $??,X
|
||
MR_ZX(); ASL(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x0E: // ASL $????
|
||
MR_AB(); ASL(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x1E: // ASL $????,X
|
||
MR_AX(); ASL(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0x24: // BIT $??
|
||
MR_ZP(); BIT();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x2C: // BIT $????
|
||
MR_AB(); BIT();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0x49: // EOR #$??
|
||
MR_IM(); EOR();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x45: // EOR $??
|
||
MR_ZP(); EOR();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x55: // EOR $??,X
|
||
MR_ZX(); EOR();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x4D: // EOR $????
|
||
MR_AB(); EOR();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x5D: // EOR $????,X
|
||
MR_AX(); EOR(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x59: // EOR $????,Y
|
||
MR_AY(); EOR(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x41: // EOR ($??,X)
|
||
MR_IX(); EOR();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x51: // EOR ($??),Y
|
||
MR_IY(); EOR(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x4A: // LSR A
|
||
LSR_A();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x46: // LSR $??
|
||
MR_ZP(); LSR(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x56: // LSR $??,X
|
||
MR_ZX(); LSR(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x4E: // LSR $????
|
||
MR_AB(); LSR(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x5E: // LSR $????,X
|
||
MR_AX(); LSR(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0x09: // ORA #$??
|
||
MR_IM(); ORA();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x05: // ORA $??
|
||
MR_ZP(); ORA();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x15: // ORA $??,X
|
||
MR_ZX(); ORA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x0D: // ORA $????
|
||
MR_AB(); ORA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x1D: // ORA $????,X
|
||
MR_AX(); ORA(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x19: // ORA $????,Y
|
||
MR_AY(); ORA(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x01: // ORA ($??,X)
|
||
MR_IX(); ORA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x11: // ORA ($??),Y
|
||
MR_IY(); ORA(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x2A: // ROL A
|
||
ROL_A();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x26: // ROL $??
|
||
MR_ZP(); ROL(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x36: // ROL $??,X
|
||
MR_ZX(); ROL(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x2E: // ROL $????
|
||
MR_AB(); ROL(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x3E: // ROL $????,X
|
||
MR_AX(); ROL(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0x6A: // ROR A
|
||
ROR_A();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x66: // ROR $??
|
||
MR_ZP(); ROR(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x76: // ROR $??,X
|
||
MR_ZX(); ROR(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x6E: // ROR $????
|
||
MR_AB(); ROR(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x7E: // ROR $????,X
|
||
MR_AX(); ROR(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0xA9: // LDA #$??
|
||
MR_IM(); LDA();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xA5: // LDA $??
|
||
MR_ZP(); LDA();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xB5: // LDA $??,X
|
||
MR_ZX(); LDA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xAD: // LDA $????
|
||
MR_AB(); LDA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xBD: // LDA $????,X
|
||
MR_AX(); LDA(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xB9: // LDA $????,Y
|
||
MR_AY(); LDA(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xA1: // LDA ($??,X)
|
||
MR_IX(); LDA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xB1: // LDA ($??),Y
|
||
MR_IY(); LDA(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0xA2: // LDX #$??
|
||
MR_IM(); LDX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xA6: // LDX $??
|
||
MR_ZP(); LDX();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xB6: // LDX $??,Y
|
||
MR_ZY(); LDX();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xAE: // LDX $????
|
||
MR_AB(); LDX();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xBE: // LDX $????,Y
|
||
MR_AY(); LDX(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0xA0: // LDY #$??
|
||
MR_IM(); LDY();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xA4: // LDY $??
|
||
MR_ZP(); LDY();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xB4: // LDY $??,X
|
||
MR_ZX(); LDY();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xAC: // LDY $????
|
||
MR_AB(); LDY();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xBC: // LDY $????,X
|
||
MR_AX(); LDY(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0x85: // STA $??
|
||
EA_ZP(); STA(); MW_ZP();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x95: // STA $??,X
|
||
EA_ZX(); STA(); MW_ZP();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x8D: // STA $????
|
||
EA_AB(); STA(); MW_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x9D: // STA $????,X
|
||
EA_AX(); STA(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x99: // STA $????,Y
|
||
EA_AY(); STA(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x81: // STA ($??,X)
|
||
EA_IX(); STA(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x91: // STA ($??),Y
|
||
EA_IY(); STA(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
|
||
case 0x86: // STX $??
|
||
EA_ZP(); STX(); MW_ZP();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x96: // STX $??,Y
|
||
EA_ZY(); STX(); MW_ZP();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x8E: // STX $????
|
||
EA_AB(); STX(); MW_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0x84: // STY $??
|
||
EA_ZP(); STY(); MW_ZP();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x94: // STY $??,X
|
||
EA_ZX(); STY(); MW_ZP();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x8C: // STY $????
|
||
EA_AB(); STY(); MW_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0xAA: // TAX
|
||
TAX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x8A: // TXA
|
||
TXA();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xA8: // TAY
|
||
TAY();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x98: // TYA
|
||
TYA();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xBA: // TSX
|
||
TSX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x9A: // TXS
|
||
TXS();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0xC9: // CMP #$??
|
||
MR_IM(); CMP_();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xC5: // CMP $??
|
||
MR_ZP(); CMP_();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xD5: // CMP $??,X
|
||
MR_ZX(); CMP_();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xCD: // CMP $????
|
||
MR_AB(); CMP_();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xDD: // CMP $????,X
|
||
MR_AX(); CMP_(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xD9: // CMP $????,Y
|
||
MR_AY(); CMP_(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xC1: // CMP ($??,X)
|
||
MR_IX(); CMP_();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xD1: // CMP ($??),Y
|
||
MR_IY(); CMP_(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0xE0: // CPX #$??
|
||
MR_IM(); CPX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xE4: // CPX $??
|
||
MR_ZP(); CPX();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xEC: // CPX $????
|
||
MR_AB(); CPX();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0xC0: // CPY #$??
|
||
MR_IM(); CPY();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xC4: // CPY $??
|
||
MR_ZP(); CPY();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xCC: // CPY $????
|
||
MR_AB(); CPY();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0x90: // BCC
|
||
MR_IM(); BCC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xB0: // BCS
|
||
MR_IM(); BCS();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xF0: // BEQ
|
||
MR_IM(); BEQ();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x30: // BMI
|
||
MR_IM(); BMI();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xD0: // BNE
|
||
MR_IM(); BNE();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x10: // BPL
|
||
MR_IM(); BPL();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x50: // BVC
|
||
MR_IM(); BVC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x70: // BVS
|
||
MR_IM(); BVS();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x4C: // JMP $????
|
||
JMP();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x6C: // JMP ($????)
|
||
JMP_ID();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x20: // JSR
|
||
JSR();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
|
||
case 0x40: // RTI
|
||
RTI();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x60: // RTS
|
||
RTS();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
|
||
// フラグ制御系
|
||
case 0x18: // CLC
|
||
CLC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xD8: // CLD
|
||
CLD();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x58: // CLI
|
||
CLI();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xB8: // CLV
|
||
CLV();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x38: // SEC
|
||
SEC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0xF8: // SED
|
||
SED();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x78: // SEI
|
||
SEI();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
// スタック系
|
||
case 0x48: // PHA
|
||
PUSH( R.A );
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x08: // PHP
|
||
PUSH( R.P | B_FLAG );
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x68: // PLA (N-----Z-)
|
||
R.A = POP();
|
||
SET_ZN_FLAG(R.A);
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x28: // PLP
|
||
R.P = POP() | R_FLAG;
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
// その他
|
||
case 0x00: // BRK
|
||
BRK();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
|
||
case 0xEA: // NOP
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
// 未公開命令群
|
||
case 0x0B: // ANC #$??
|
||
case 0x2B: // ANC #$??
|
||
MR_IM(); ANC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x8B: // ANE #$??
|
||
MR_IM(); ANE();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x6B: // ARR #$??
|
||
MR_IM(); ARR();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x4B: // ASR #$??
|
||
MR_IM(); ASR();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0xC7: // DCP $??
|
||
MR_ZP(); DCP(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xD7: // DCP $??,X
|
||
MR_ZX(); DCP(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xCF: // DCP $????
|
||
MR_AB(); DCP(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xDF: // DCP $????,X
|
||
MR_AX(); DCP(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0xDB: // DCP $????,Y
|
||
MR_AY(); DCP(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0xC3: // DCP ($??,X)
|
||
MR_IX(); DCP(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
case 0xD3: // DCP ($??),Y
|
||
MR_IY(); DCP(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
|
||
case 0xE7: // ISB $??
|
||
MR_ZP(); ISB(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xF7: // ISB $??,X
|
||
MR_ZX(); ISB(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xEF: // ISB $????
|
||
MR_AB(); ISB(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xFF: // ISB $????,X
|
||
MR_AX(); ISB(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xFB: // ISB $????,Y
|
||
MR_AY(); ISB(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xE3: // ISB ($??,X)
|
||
MR_IX(); ISB(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0xF3: // ISB ($??),Y
|
||
MR_IY(); ISB(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0xBB: // LAS $????,Y
|
||
MR_AY(); LAS(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
|
||
case 0xA7: // LAX $??
|
||
MR_ZP(); LAX();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0xB7: // LAX $??,Y
|
||
MR_ZY(); LAX();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xAF: // LAX $????
|
||
MR_AB(); LAX();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xBF: // LAX $????,Y
|
||
MR_AY(); LAX(); CHECK_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0xA3: // LAX ($??,X)
|
||
MR_IX(); LAX();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0xB3: // LAX ($??),Y
|
||
MR_IY(); LAX(); CHECK_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0xAB: // LXA #$??
|
||
MR_IM(); LXA();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x27: // RLA $??
|
||
MR_ZP(); RLA(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x37: // RLA $??,X
|
||
MR_ZX(); RLA(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x2F: // RLA $????
|
||
MR_AB(); RLA(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x3F: // RLA $????,X
|
||
MR_AX(); RLA(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x3B: // RLA $????,Y
|
||
MR_AY(); RLA(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x23: // RLA ($??,X)
|
||
MR_IX(); RLA(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
case 0x33: // RLA ($??),Y
|
||
MR_IY(); RLA(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
|
||
case 0x67: // RRA $??
|
||
MR_ZP(); RRA(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x77: // RRA $??,X
|
||
MR_ZX(); RRA(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x6F: // RRA $????
|
||
MR_AB(); RRA(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x7F: // RRA $????,X
|
||
MR_AX(); RRA(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x7B: // RRA $????,Y
|
||
MR_AY(); RRA(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x63: // RRA ($??,X)
|
||
MR_IX(); RRA(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
case 0x73: // RRA ($??),Y
|
||
MR_IY(); RRA(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
|
||
case 0x87: // SAX $??
|
||
MR_ZP(); SAX(); MW_ZP();
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x97: // SAX $??,Y
|
||
MR_ZY(); SAX(); MW_ZP();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x8F: // SAX $????
|
||
MR_AB(); SAX(); MW_EA();
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x83: // SAX ($??,X)
|
||
MR_IX(); SAX(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
|
||
case 0xCB: // SBX #$??
|
||
MR_IM(); SBX();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x9F: // SHA $????,Y
|
||
MR_AY(); SHA(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x93: // SHA ($??),Y
|
||
MR_IY(); SHA(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
|
||
case 0x9B: // SHS $????,Y
|
||
MR_AY(); SHS(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x9E: // SHX $????,Y
|
||
MR_AY(); SHX(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x9C: // SHY $????,X
|
||
MR_AX(); SHY(); MW_EA();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
|
||
case 0x07: // SLO $??
|
||
MR_ZP(); SLO(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x17: // SLO $??,X
|
||
MR_ZX(); SLO(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x0F: // SLO $????
|
||
MR_AB(); SLO(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x1F: // SLO $????,X
|
||
MR_AX(); SLO(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x1B: // SLO $????,Y
|
||
MR_AY(); SLO(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x03: // SLO ($??,X)
|
||
MR_IX(); SLO(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
case 0x13: // SLO ($??),Y
|
||
MR_IY(); SLO(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
|
||
case 0x47: // SRE $??
|
||
MR_ZP(); SRE(); MW_ZP();
|
||
ADD_CYCLE(5);
|
||
break;
|
||
case 0x57: // SRE $??,X
|
||
MR_ZX(); SRE(); MW_ZP();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x4F: // SRE $????
|
||
MR_AB(); SRE(); MW_EA();
|
||
ADD_CYCLE(6);
|
||
break;
|
||
case 0x5F: // SRE $????,X
|
||
MR_AX(); SRE(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x5B: // SRE $????,Y
|
||
MR_AY(); SRE(); MW_EA();
|
||
ADD_CYCLE(7);
|
||
break;
|
||
case 0x43: // SRE ($??,X)
|
||
MR_IX(); SRE(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
case 0x53: // SRE ($??),Y
|
||
MR_IY(); SRE(); MW_EA();
|
||
ADD_CYCLE(8);
|
||
break;
|
||
|
||
case 0xEB: // SBC #$?? (Unofficial)
|
||
MR_IM(); SBC();
|
||
ADD_CYCLE(2);
|
||
break;
|
||
|
||
case 0x1A: // NOP (Unofficial)
|
||
case 0x3A: // NOP (Unofficial)
|
||
case 0x5A: // NOP (Unofficial)
|
||
case 0x7A: // NOP (Unofficial)
|
||
case 0xDA: // NOP (Unofficial)
|
||
case 0xFA: // NOP (Unofficial)
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x80: // DOP (CYCLES 2)
|
||
case 0x82: // DOP (CYCLES 2)
|
||
case 0x89: // DOP (CYCLES 2)
|
||
case 0xC2: // DOP (CYCLES 2)
|
||
case 0xE2: // DOP (CYCLES 2)
|
||
R.PC++;
|
||
ADD_CYCLE(2);
|
||
break;
|
||
case 0x04: // DOP (CYCLES 3)
|
||
case 0x44: // DOP (CYCLES 3)
|
||
case 0x64: // DOP (CYCLES 3)
|
||
R.PC++;
|
||
ADD_CYCLE(3);
|
||
break;
|
||
case 0x14: // DOP (CYCLES 4)
|
||
case 0x34: // DOP (CYCLES 4)
|
||
case 0x54: // DOP (CYCLES 4)
|
||
case 0x74: // DOP (CYCLES 4)
|
||
case 0xD4: // DOP (CYCLES 4)
|
||
case 0xF4: // DOP (CYCLES 4)
|
||
R.PC++;
|
||
ADD_CYCLE(4);
|
||
break;
|
||
case 0x0C: // TOP
|
||
case 0x1C: // TOP
|
||
case 0x3C: // TOP
|
||
case 0x5C: // TOP
|
||
case 0x7C: // TOP
|
||
case 0xDC: // TOP
|
||
case 0xFC: // TOP
|
||
R.PC+=2;
|
||
ADD_CYCLE(4);
|
||
break;
|
||
|
||
case 0x02: /* JAM */
|
||
case 0x12: /* JAM */
|
||
case 0x22: /* JAM */
|
||
case 0x32: /* JAM */
|
||
case 0x42: /* JAM */
|
||
case 0x52: /* JAM */
|
||
case 0x62: /* JAM */
|
||
case 0x72: /* JAM */
|
||
case 0x92: /* JAM */
|
||
case 0xB2: /* JAM */
|
||
case 0xD2: /* JAM */
|
||
case 0xF2: /* JAM */
|
||
default:
|
||
if( !Config.emulator.bIllegalOp ) {
|
||
throw CApp::GetErrorString( IDS_ERROR_ILLEGALOPCODE );
|
||
goto _execute_exit;
|
||
} else {
|
||
R.PC--;
|
||
ADD_CYCLE(4);
|
||
}
|
||
break;
|
||
// default:
|
||
// __assume(0);
|
||
}
|
||
|
||
if( nmi_request ) {
|
||
_NMI();
|
||
} else
|
||
if( irq_request ) {
|
||
_IRQ();
|
||
}
|
||
|
||
request_cycles -= exec_cycles;
|
||
TOTAL_cycles += exec_cycles;
|
||
|
||
// クロック同期処理
|
||
mapper->Clock( exec_cycles );
|
||
#if DPCM_SYNCCLOCK
|
||
apu->SyncDPCM( exec_cycles );
|
||
#endif
|
||
if( bClockProcess ) {
|
||
nes->Clock( exec_cycles );
|
||
}
|
||
// nes->Clock( exec_cycles );
|
||
}
|
||
_execute_exit:
|
||
|
||
#if !DPCM_SYNCCLOCK
|
||
apu->SyncDPCM( TOTAL_cycles - OLD_cycles );
|
||
#endif
|
||
|
||
return TOTAL_cycles - OLD_cycles;
|
||
}
|