//----------------------------------------------------------------------------
//
// i286x : 80286 Engine for Pentium ver0.05
//
// Copyright by Yui/Studio Milmake 1999-2003
//
//----------------------------------------------------------------------------
#if defined(CPUCORE_IA32)
#error : not support CPUCORE_IA32
#endif
#if defined(CPUSTRUC_MEMWAIT)
#error : not support CPUSTRUC_MEMWAIT
#endif
#include "memory.h"
#if !defined(CPUDEBUG)
enum {
I286_MEMREADMAX = 0xa4000,
I286_MEMWRITEMAX = 0xa0000
};
#else // ダイレクトアクセス範囲を狭める
enum {
I286_MEMREADMAX = 0x00400,
I286_MEMWRITEMAX = 0x00400
};
#endif
enum {
C_FLAG = 0x0001,
P_FLAG = 0x0004,
A_FLAG = 0x0010,
Z_FLAG = 0x0040,
S_FLAG = 0x0080,
T_FLAG = 0x0100,
I_FLAG = 0x0200,
D_FLAG = 0x0400,
O_FLAG = 0x0800
};
enum {
MSW_PE = 0x0001,
MSW_MP = 0x0002,
MSW_EM = 0x0004,
MSW_TS = 0x0008
};
enum {
CPUTYPE_V30 = 0x01
};
#ifndef CPUCALL
#define CPUCALL __fastcall
#endif
#if defined(BYTESEX_LITTLE)
typedef struct {
UINT8 al;
UINT8 ah;
UINT8 cl;
UINT8 ch;
UINT8 dl;
UINT8 dh;
UINT8 bl;
UINT8 bh;
UINT8 sp_l;
UINT8 sp_h;
UINT8 bp_l;
UINT8 bp_h;
UINT8 si_l;
UINT8 si_h;
UINT8 di_l;
UINT8 di_h;
UINT8 es_l;
UINT8 es_h;
UINT8 cs_l;
UINT8 cs_h;
UINT8 ss_l;
UINT8 ss_h;
UINT8 ds_l;
UINT8 ds_h;
UINT8 flag_l;
UINT8 flag_h;
UINT8 ip_l;
UINT8 ip_h;
} I286REG8;
#else
typedef struct {
UINT8 ah;
UINT8 al;
UINT8 ch;
UINT8 cl;
UINT8 dh;
UINT8 dl;
UINT8 bh;
UINT8 bl;
UINT8 sp_h;
UINT8 sp_l;
UINT8 bp_h;
UINT8 bp_l;
UINT8 si_h;
UINT8 si_l;
UINT8 di_h;
UINT8 di_l;
UINT8 es_h;
UINT8 es_l;
UINT8 cs_h;
UINT8 cs_l;
UINT8 ss_h;
UINT8 ss_l;
UINT8 ds_h;
UINT8 ds_l;
UINT8 flag_h;
UINT8 flag_l;
UINT8 ip_h;
UINT8 ip_l;
} I286REG8;
#endif
typedef struct {
UINT16 ax;
UINT16 cx;
UINT16 dx;
UINT16 bx;
UINT16 sp;
UINT16 bp;
UINT16 si;
UINT16 di;
UINT16 es;
UINT16 cs;
UINT16 ss;
UINT16 ds;
UINT16 flag;
UINT16 ip;
} I286REG16;
typedef struct {
UINT16 limit;
UINT16 base;
UINT8 base24;
UINT8 reserved;
} I286DTR;
typedef struct {
union {
I286REG8 b;
I286REG16 w;
} r;
UINT32 es_base;
UINT32 cs_base;
UINT32 ss_base;
UINT32 ds_base;
UINT32 ss_fix;
UINT32 ds_fix;
UINT32 adrsmask; // ver0.72
UINT16 prefix;
UINT8 trap;
UINT8 resetreq; // ver0.72
UINT8 prefetchque[4];
I286DTR GDTR;
UINT16 MSW;
I286DTR IDTR;
UINT16 LDTR; // ver0.73
I286DTR LDTRC;
UINT16 TR;
I286DTR TRC;
UINT8 padding[2];
UINT8 cpu_type;
UINT8 itfbank; // ver0.72
UINT16 ram_d0;
SINT32 remainclock;
SINT32 baseclock;
UINT32 clock;
} I286STAT;
typedef struct { // for ver0.73
UINT8 *ext;
UINT32 extsize;
UINT8 *ems[4];
UINT32 repbak;
UINT32 inport;
} I286EXT;
typedef struct {
I286STAT s; // STATsaveされる奴
I286EXT e;
} I286CORE;
#ifdef __cplusplus
extern "C" {
#endif
extern I286CORE i286core;
extern const UINT8 iflags[];
void i286x_initialize(void);
void i286x_deinitialize(void);
void i286x_reset(void);
void i286x_shut(void);
void i286x_resetprefetch(void);
void i286x_setextsize(UINT32 size);
void i286x_setemm(UINT frame, UINT32 addr);
void CPUCALL i286x_interrupt(UINT8 vect);
void i286x(void);
void i286x_step(void);
void v30x(void);
void v30x_step(void);
#ifdef __cplusplus
}
#endif
// ---- macros
#define CPU_STATSAVE i286core.s
#define CPU_AX i286core.s.r.w.ax
#define CPU_BX i286core.s.r.w.bx
#define CPU_CX i286core.s.r.w.cx
#define CPU_DX i286core.s.r.w.dx
#define CPU_SI i286core.s.r.w.si
#define CPU_DI i286core.s.r.w.di
#define CPU_BP i286core.s.r.w.bp
#define CPU_SP i286core.s.r.w.sp
#define CPU_CS i286core.s.r.w.cs
#define CPU_DS i286core.s.r.w.ds
#define CPU_ES i286core.s.r.w.es
#define CPU_SS i286core.s.r.w.ss
#define CPU_IP i286core.s.r.w.ip
#define CPU_EAX i286core.s.r.w.ax
#define CPU_EBX i286core.s.r.w.bx
#define CPU_ECX i286core.s.r.w.cx
#define CPU_EDX i286core.s.r.w.dx
#define CPU_ESI i286core.s.r.w.si
#define CPU_EDI i286core.s.r.w.di
#define CPU_EBP i286core.s.r.w.bp
#define CPU_ESP i286core.s.r.w.sp
#define CPU_EIP i286core.s.r.w.ip
#define ES_BASE i286core.s.es_base
#define CS_BASE i286core.s.cs_base
#define SS_BASE i286core.s.ss_base
#define DS_BASE i286core.s.ds_base
#define CPU_AL i286core.s.r.b.al
#define CPU_BL i286core.s.r.b.bl
#define CPU_CL i286core.s.r.b.cl
#define CPU_DL i286core.s.r.b.dl
#define CPU_AH i286core.s.r.b.ah
#define CPU_BH i286core.s.r.b.bh
#define CPU_CH i286core.s.r.b.ch
#define CPU_DH i286core.s.r.b.dh
#define CPU_FLAG i286core.s.r.w.flag
#define CPU_FLAGL i286core.s.r.b.flag_l
#define CPU_REMCLOCK i286core.s.remainclock
#define CPU_BASECLOCK i286core.s.baseclock
#define CPU_CLOCK i286core.s.clock
#define CPU_ADRSMASK i286core.s.adrsmask
#define CPU_MSW i286core.s.MSW
#define CPU_RESETREQ i286core.s.resetreq
#define CPU_ITFBANK i286core.s.itfbank
#define CPU_RAM_D000 i286core.s.ram_d0
#define CPU_EXTMEM i286core.e.ext
#define CPU_EXTMEMSIZE i286core.e.extsize
#define CPU_INPADRS i286core.e.inport
#define CPU_TYPE i286core.s.cpu_type
#define CPU_isDI (!(i286core.s.r.w.flag & I_FLAG))
#define CPU_isEI (i286core.s.r.w.flag & I_FLAG)
#define CPU_CLI i286core.s.r.w.flag &= ~I_FLAG; \
i286core.s.trap = 0;
#define CPU_STI i286core.s.r.w.flag |= I_FLAG; \
i286core.s.trap = (i286core.s.r.w.flag >> 8) & 1;
#define CPU_A20EN(en) CPU_ADRSMASK = (en)?0x00ffffff:0x000fffff;
#define CPU_INITIALIZE i286x_initialize
#define CPU_DEINITIALIZE i286x_deinitialize
#define CPU_RESET i286x_reset
#define CPU_CLEARPREFETCH i286x_resetprefetch
#define CPU_INTERRUPT(vect, soft) i286x_interrupt(vect)
#define CPU_EXEC i286x
#define CPU_EXECV30 v30x
#define CPU_SHUT i286x_shut
#define CPU_SETEXTSIZE(size) i286x_setextsize((UINT32)(size) << 20)
#define CPU_SETEMM(frame, addr) i286x_setemm(frame, addr)
#define CPU_STEPEXEC i286x_step
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