3b1emu / file revision

 #include <stdio.h>

 /* ======================================================================== */

 /* ========================= LICENSING & COPYRIGHT ======================== */

 /* ======================================================================== */

 /*

  *                                  MUSASHI

  *                                Version 3.3

  *

  * A portable Motorola M680x0 processor emulation engine.

  * Copyright 1998-2001 Karl Stenerud.  All rights reserved.

  *

  * This code may be freely used for non-commercial purposes as long as this

  * copyright notice remains unaltered in the source code and any binary files

  * containing this code in compiled form.

  *

  * All other lisencing terms must be negotiated with the author

  * (Karl Stenerud).

  *

  * The latest version of this code can be obtained at:

  * http://kstenerud.cjb.net

  */

 #ifndef M68KCPU__HEADER

 #define M68KCPU__HEADER

 #include "m68k.h"

 #include <limits.h>

 #if M68K_EMULATE_ADDRESS_ERROR

 #include <setjmp.h>

 #endif /* M68K_EMULATE_ADDRESS_ERROR */

 /* ======================================================================== */

 /* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */

 /* ======================================================================== */

 /* Check for > 32bit sizes */

 #if UINT_MAX > 0xffffffff

 	#define M68K_INT_GT_32_BIT  1

 #endif

 /* Data types used in this emulation core */

 #undef sint8

 #undef sint16

 #undef sint32

 #undef sint64

 #undef uint8

 #undef uint16

 #undef uint32

 #undef uint64

 #undef sint

 #undef uint

 #define sint8  signed   char			/* ASG: changed from char to signed char */

 #define sint16 signed   short

 #define sint32 signed   long

 #define uint8  unsigned char

 #define uint16 unsigned short

 #define uint32 unsigned long

 /* signed and unsigned int must be at least 32 bits wide */

 #define sint   signed   int

 #define uint   unsigned int

 #if M68K_USE_64_BIT

 #define sint64 signed   long long

 #define uint64 unsigned long long

 #else

 #define sint64 sint32

 #define uint64 uint32

 #endif /* M68K_USE_64_BIT */

 /* Allow for architectures that don't have 8-bit sizes */

 #if UCHAR_MAX == 0xff

 	#define MAKE_INT_8(A) (sint8)(A)

 #else

 	#undef  sint8

 	#define sint8  signed   int

 	#undef  uint8

 	#define uint8  unsigned int

 	INLINE sint MAKE_INT_8(uint value)

 	{

 		return (value & 0x80) ? value | ~0xff : value & 0xff;

 	}

 #endif /* UCHAR_MAX == 0xff */

 /* Allow for architectures that don't have 16-bit sizes */

 #if USHRT_MAX == 0xffff

 	#define MAKE_INT_16(A) (sint16)(A)

 #else

 	#undef  sint16

 	#define sint16 signed   int

 	#undef  uint16

 	#define uint16 unsigned int

 	INLINE sint MAKE_INT_16(uint value)

 	{

 		return (value & 0x8000) ? value | ~0xffff : value & 0xffff;

 	}

 #endif /* USHRT_MAX == 0xffff */

 /* Allow for architectures that don't have 32-bit sizes */

 #if ULONG_MAX == 0xffffffff

 	#define MAKE_INT_32(A) (sint32)(A)

 #else

 	#undef  sint32

 	#define sint32  signed   int

 	#undef  uint32

 	#define uint32  unsigned int

 	INLINE sint MAKE_INT_32(uint value)

 	{

 		return (value & 0x80000000) ? value | ~0xffffffff : value & 0xffffffff;

 	}

 #endif /* ULONG_MAX == 0xffffffff */

 /* ======================================================================== */

 /* ============================ GENERAL DEFINES =========================== */

 /* ======================================================================== */

 /* Exception Vectors handled by emulation */

 #define EXCEPTION_BUS_ERROR                2 /* This one is not emulated! */

 #define EXCEPTION_ADDRESS_ERROR            3 /* This one is partially emulated (doesn't stack a proper frame yet) */

 #define EXCEPTION_ILLEGAL_INSTRUCTION      4

 #define EXCEPTION_ZERO_DIVIDE              5

 #define EXCEPTION_CHK                      6

 #define EXCEPTION_TRAPV                    7

 #define EXCEPTION_PRIVILEGE_VIOLATION      8

 #define EXCEPTION_TRACE                    9

 #define EXCEPTION_1010                    10

 #define EXCEPTION_1111                    11

 #define EXCEPTION_FORMAT_ERROR            14

 #define EXCEPTION_UNINITIALIZED_INTERRUPT 15

 #define EXCEPTION_SPURIOUS_INTERRUPT      24

 #define EXCEPTION_INTERRUPT_AUTOVECTOR    24

 #define EXCEPTION_TRAP_BASE               32

 /* Function codes set by CPU during data/address bus activity */

 #define FUNCTION_CODE_USER_DATA          1

 #define FUNCTION_CODE_USER_PROGRAM       2

 #define FUNCTION_CODE_SUPERVISOR_DATA    5

 #define FUNCTION_CODE_SUPERVISOR_PROGRAM 6

 #define FUNCTION_CODE_CPU_SPACE          7

 /* CPU types for deciding what to emulate */

 #define CPU_TYPE_000   1

 #define CPU_TYPE_010   2

 #define CPU_TYPE_EC020 4

 #define CPU_TYPE_020   8

 /* Different ways to stop the CPU */

 #define STOP_LEVEL_STOP 1

 #define STOP_LEVEL_HALT 2

 #ifndef NULL

 #define NULL ((void*)0)

 #endif

 /* ======================================================================== */

 /* ================================ MACROS ================================ */

 /* ======================================================================== */

 /* ---------------------------- General Macros ---------------------------- */

 /* Bit Isolation Macros */

 #define BIT_0(A)  ((A) & 0x00000001)

 #define BIT_1(A)  ((A) & 0x00000002)

 #define BIT_2(A)  ((A) & 0x00000004)

 #define BIT_3(A)  ((A) & 0x00000008)

 #define BIT_4(A)  ((A) & 0x00000010)

 #define BIT_5(A)  ((A) & 0x00000020)

 #define BIT_6(A)  ((A) & 0x00000040)

 #define BIT_7(A)  ((A) & 0x00000080)

 #define BIT_8(A)  ((A) & 0x00000100)

 #define BIT_9(A)  ((A) & 0x00000200)

 #define BIT_A(A)  ((A) & 0x00000400)

 #define BIT_B(A)  ((A) & 0x00000800)

 #define BIT_C(A)  ((A) & 0x00001000)

 #define BIT_D(A)  ((A) & 0x00002000)

 #define BIT_E(A)  ((A) & 0x00004000)

 #define BIT_F(A)  ((A) & 0x00008000)

 #define BIT_10(A) ((A) & 0x00010000)

 #define BIT_11(A) ((A) & 0x00020000)

 #define BIT_12(A) ((A) & 0x00040000)

 #define BIT_13(A) ((A) & 0x00080000)

 #define BIT_14(A) ((A) & 0x00100000)

 #define BIT_15(A) ((A) & 0x00200000)

 #define BIT_16(A) ((A) & 0x00400000)

 #define BIT_17(A) ((A) & 0x00800000)

 #define BIT_18(A) ((A) & 0x01000000)

 #define BIT_19(A) ((A) & 0x02000000)

 #define BIT_1A(A) ((A) & 0x04000000)

 #define BIT_1B(A) ((A) & 0x08000000)

 #define BIT_1C(A) ((A) & 0x10000000)

 #define BIT_1D(A) ((A) & 0x20000000)

 #define BIT_1E(A) ((A) & 0x40000000)

 #define BIT_1F(A) ((A) & 0x80000000)

 /* Get the most significant bit for specific sizes */

 #define GET_MSB_8(A)  ((A) & 0x80)

 #define GET_MSB_9(A)  ((A) & 0x100)

 #define GET_MSB_16(A) ((A) & 0x8000)

 #define GET_MSB_17(A) ((A) & 0x10000)

 #define GET_MSB_32(A) ((A) & 0x80000000)

 #if M68K_USE_64_BIT

 #define GET_MSB_33(A) ((A) & 0x100000000)

 #endif /* M68K_USE_64_BIT */

 /* Isolate nibbles */

 #define LOW_NIBBLE(A)  ((A) & 0x0f)

 #define HIGH_NIBBLE(A) ((A) & 0xf0)

 /* These are used to isolate 8, 16, and 32 bit sizes */

 #define MASK_OUT_ABOVE_2(A)  ((A) & 3)

 #define MASK_OUT_ABOVE_8(A)  ((A) & 0xff)

 #define MASK_OUT_ABOVE_16(A) ((A) & 0xffff)

 #define MASK_OUT_BELOW_2(A)  ((A) & ~3)

 #define MASK_OUT_BELOW_8(A)  ((A) & ~0xff)

 #define MASK_OUT_BELOW_16(A) ((A) & ~0xffff)

 /* No need to mask if we are 32 bit */

 #if M68K_INT_GT_32BIT || M68K_USE_64_BIT

 	#define MASK_OUT_ABOVE_32(A) ((A) & 0xffffffff)

 	#define MASK_OUT_BELOW_32(A) ((A) & ~0xffffffff)

 #else

 	#define MASK_OUT_ABOVE_32(A) (A)

 	#define MASK_OUT_BELOW_32(A) 0

 #endif /* M68K_INT_GT_32BIT || M68K_USE_64_BIT */

 /* Simulate address lines of 68k family */

 #define ADDRESS_68K(A) ((A)&CPU_ADDRESS_MASK)

 /* Shift & Rotate Macros. */

 #define LSL(A, C) ((A) << (C))

 #define LSR(A, C) ((A) >> (C))

 /* Some > 32-bit optimizations */

 #if M68K_INT_GT_32BIT

 	/* Shift left and right */

 	#define LSR_32(A, C) ((A) >> (C))

 	#define LSL_32(A, C) ((A) << (C))

 #else

 	/* We have to do this because the morons at ANSI decided that shifts

 	 * by >= data size are undefined.

 	 */

 	#define LSR_32(A, C) ((C) < 32 ? (A) >> (C) : 0)

 	#define LSL_32(A, C) ((C) < 32 ? (A) << (C) : 0)

 #endif /* M68K_INT_GT_32BIT */

 #if M68K_USE_64_BIT

 	#define LSL_32_64(A, C) ((A) << (C))

 	#define LSR_32_64(A, C) ((A) >> (C))

 	#define ROL_33_64(A, C) (LSL_32_64(A, C) | LSR_32_64(A, 33-(C)))

 	#define ROR_33_64(A, C) (LSR_32_64(A, C) | LSL_32_64(A, 33-(C)))

 #endif /* M68K_USE_64_BIT */

 #define ROL_8(A, C)      MASK_OUT_ABOVE_8(LSL(A, C) | LSR(A, 8-(C)))

 #define ROL_9(A, C)                      (LSL(A, C) | LSR(A, 9-(C)))

 #define ROL_16(A, C)    MASK_OUT_ABOVE_16(LSL(A, C) | LSR(A, 16-(C)))

 #define ROL_17(A, C)                     (LSL(A, C) | LSR(A, 17-(C)))

 #define ROL_32(A, C)    MASK_OUT_ABOVE_32(LSL_32(A, C) | LSR_32(A, 32-(C)))

 #define ROL_33(A, C)                     (LSL_32(A, C) | LSR_32(A, 33-(C)))

 #define ROR_8(A, C)      MASK_OUT_ABOVE_8(LSR(A, C) | LSL(A, 8-(C)))

 #define ROR_9(A, C)                      (LSR(A, C) | LSL(A, 9-(C)))

 #define ROR_16(A, C)    MASK_OUT_ABOVE_16(LSR(A, C) | LSL(A, 16-(C)))

 #define ROR_17(A, C)                     (LSR(A, C) | LSL(A, 17-(C)))

 #define ROR_32(A, C)    MASK_OUT_ABOVE_32(LSR_32(A, C) | LSL_32(A, 32-(C)))

 #define ROR_33(A, C)                     (LSR_32(A, C) | LSL_32(A, 33-(C)))

 /* ------------------------------ CPU Access ------------------------------ */

 /* Access the CPU registers */

 #define CPU_TYPE         m68ki_cpu.cpu_type

 #define REG_DA           m68ki_cpu.dar /* easy access to data and address regs */

 #define REG_D            m68ki_cpu.dar

 #define REG_A            (m68ki_cpu.dar+8)

 #define REG_PPC 		 m68ki_cpu.ppc

 #define REG_PC           m68ki_cpu.pc

 #define REG_SP_BASE      m68ki_cpu.sp

 #define REG_USP          m68ki_cpu.sp[0]

 #define REG_ISP          m68ki_cpu.sp[4]

 #define REG_MSP          m68ki_cpu.sp[6]

 #define REG_SP           m68ki_cpu.dar[15]

 #define REG_VBR          m68ki_cpu.vbr

 #define REG_SFC          m68ki_cpu.sfc

 #define REG_DFC          m68ki_cpu.dfc

 #define REG_CACR         m68ki_cpu.cacr

 #define REG_CAAR         m68ki_cpu.caar

 #define REG_IR           m68ki_cpu.ir

 #define FLAG_T1          m68ki_cpu.t1_flag

 #define FLAG_T0          m68ki_cpu.t0_flag

 #define FLAG_S           m68ki_cpu.s_flag

 #define FLAG_M           m68ki_cpu.m_flag

 #define FLAG_X           m68ki_cpu.x_flag

 #define FLAG_N           m68ki_cpu.n_flag

 #define FLAG_Z           m68ki_cpu.not_z_flag

 #define FLAG_V           m68ki_cpu.v_flag

 #define FLAG_C           m68ki_cpu.c_flag

 #define FLAG_INT_MASK    m68ki_cpu.int_mask

 #define CPU_INT_LEVEL    m68ki_cpu.int_level /* ASG: changed from CPU_INTS_PENDING */

 #define CPU_INT_CYCLES   m68ki_cpu.int_cycles /* ASG */

 #define CPU_STOPPED      m68ki_cpu.stopped

 #define CPU_PREF_ADDR    m68ki_cpu.pref_addr

 #define CPU_PREF_DATA    m68ki_cpu.pref_data

 #define CPU_ADDRESS_MASK m68ki_cpu.address_mask

 #define CPU_SR_MASK      m68ki_cpu.sr_mask

 #define BUS_ERROR_OCCURRED m68ki_cpu.bus_error_occurred

 #define CYC_INSTRUCTION  m68ki_cpu.cyc_instruction

 #define CYC_EXCEPTION    m68ki_cpu.cyc_exception

 #define CYC_BCC_NOTAKE_B m68ki_cpu.cyc_bcc_notake_b

 #define CYC_BCC_NOTAKE_W m68ki_cpu.cyc_bcc_notake_w

 #define CYC_DBCC_F_NOEXP m68ki_cpu.cyc_dbcc_f_noexp

 #define CYC_DBCC_F_EXP   m68ki_cpu.cyc_dbcc_f_exp

 #define CYC_SCC_R_FALSE  m68ki_cpu.cyc_scc_r_false

 #define CYC_MOVEM_W      m68ki_cpu.cyc_movem_w

 #define CYC_MOVEM_L      m68ki_cpu.cyc_movem_l

 #define CYC_SHIFT        m68ki_cpu.cyc_shift

 #define CYC_RESET        m68ki_cpu.cyc_reset

 #define CALLBACK_INT_ACK     m68ki_cpu.int_ack_callback

 #define CALLBACK_BKPT_ACK    m68ki_cpu.bkpt_ack_callback

 #define CALLBACK_RESET_INSTR m68ki_cpu.reset_instr_callback

 #define CALLBACK_PC_CHANGED  m68ki_cpu.pc_changed_callback

 #define CALLBACK_SET_FC      m68ki_cpu.set_fc_callback

 #define CALLBACK_INSTR_HOOK  m68ki_cpu.instr_hook_callback

 /* ----------------------------- Configuration ---------------------------- */

 /* These defines are dependant on the configuration defines in m68kconf.h */

 /* Disable certain comparisons if we're not using all CPU types */

 #if M68K_EMULATE_020

 	#define CPU_TYPE_IS_020_PLUS(A)    ((A) & CPU_TYPE_020)

 	#define CPU_TYPE_IS_020_LESS(A)    1

 #else

 	#define CPU_TYPE_IS_020_PLUS(A)    0

 	#define CPU_TYPE_IS_020_LESS(A)    1

 #endif

 #if M68K_EMULATE_EC020

 	#define CPU_TYPE_IS_EC020_PLUS(A)  ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020))

 	#define CPU_TYPE_IS_EC020_LESS(A)  ((A) & (CPU_TYPE_000 | CPU_TYPE_010 | CPU_TYPE_EC020))

 #else

 	#define CPU_TYPE_IS_EC020_PLUS(A)  CPU_TYPE_IS_020_PLUS(A)

 	#define CPU_TYPE_IS_EC020_LESS(A)  CPU_TYPE_IS_020_LESS(A)

 #endif

 #if M68K_EMULATE_010

 	#define CPU_TYPE_IS_010(A)         ((A) == CPU_TYPE_010)

 	#define CPU_TYPE_IS_010_PLUS(A)    ((A) & (CPU_TYPE_010 | CPU_TYPE_EC020 | CPU_TYPE_020))

 	#define CPU_TYPE_IS_010_LESS(A)    ((A) & (CPU_TYPE_000 | CPU_TYPE_010))

 #else

 	#define CPU_TYPE_IS_010(A)         0

 	#define CPU_TYPE_IS_010_PLUS(A)    CPU_TYPE_IS_EC020_PLUS(A)

 	#define CPU_TYPE_IS_010_LESS(A)    CPU_TYPE_IS_EC020_LESS(A)

 #endif

 #if M68K_EMULATE_020 || M68K_EMULATE_EC020

 	#define CPU_TYPE_IS_020_VARIANT(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020))

 #else

 	#define CPU_TYPE_IS_020_VARIANT(A) 0

 #endif

 #if M68K_EMULATE_020 || M68K_EMULATE_EC020 || M68K_EMULATE_010

 	#define CPU_TYPE_IS_000(A)         ((A) == CPU_TYPE_000)

 #else

 	#define CPU_TYPE_IS_000(A)         1

 #endif

 #if !M68K_SEPARATE_READS

 #define m68k_read_immediate_16(A) m68ki_read_program_16(A)

 #define m68k_read_immediate_32(A) m68ki_read_program_32(A)

 #define m68k_read_pcrelative_8(A) m68ki_read_program_8(A)

 #define m68k_read_pcrelative_16(A) m68ki_read_program_16(A)

 #define m68k_read_pcrelative_32(A) m68ki_read_program_32(A)

 #endif /* M68K_SEPARATE_READS */

 /* Enable or disable callback functions */

 #if M68K_EMULATE_INT_ACK

 	#if M68K_EMULATE_INT_ACK == OPT_SPECIFY_HANDLER

 		#define m68ki_int_ack(A) M68K_INT_ACK_CALLBACK(A)

 	#else

 		#define m68ki_int_ack(A) CALLBACK_INT_ACK(A)

 	#endif

 #else

 	/* Default action is to used autovector mode, which is most common */

 	#define m68ki_int_ack(A) M68K_INT_ACK_AUTOVECTOR

 #endif /* M68K_EMULATE_INT_ACK */

 #if M68K_EMULATE_BKPT_ACK

 	#if M68K_EMULATE_BKPT_ACK == OPT_SPECIFY_HANDLER

 		#define m68ki_bkpt_ack(A) M68K_BKPT_ACK_CALLBACK(A)

 	#else

 		#define m68ki_bkpt_ack(A) CALLBACK_BKPT_ACK(A)

 	#endif

 #else

 	#define m68ki_bkpt_ack(A)

 #endif /* M68K_EMULATE_BKPT_ACK */

 #if M68K_EMULATE_RESET

 	#if M68K_EMULATE_RESET == OPT_SPECIFY_HANDLER

 		#define m68ki_output_reset() M68K_RESET_CALLBACK()

 	#else

 		#define m68ki_output_reset() CALLBACK_RESET_INSTR()

 	#endif

 #else

 	#define m68ki_output_reset()

 #endif /* M68K_EMULATE_RESET */

 #if M68K_INSTRUCTION_HOOK

 	#if M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER

 		#define m68ki_instr_hook() M68K_INSTRUCTION_CALLBACK()

 	#else

 		#define m68ki_instr_hook() CALLBACK_INSTR_HOOK()

 	#endif

 #else

 	#define m68ki_instr_hook()

 #endif /* M68K_INSTRUCTION_HOOK */

 #if M68K_MONITOR_PC

 	#if M68K_MONITOR_PC == OPT_SPECIFY_HANDLER

 		#define m68ki_pc_changed(A) M68K_SET_PC_CALLBACK(ADDRESS_68K(A))

 	#else

 		#define m68ki_pc_changed(A) CALLBACK_PC_CHANGED(ADDRESS_68K(A))

 	#endif

 #else

 	#define m68ki_pc_changed(A)

 #endif /* M68K_MONITOR_PC */

 /* Enable or disable function code emulation */

 #if M68K_EMULATE_FC

 	#if M68K_EMULATE_FC == OPT_SPECIFY_HANDLER

 		#define m68ki_set_fc(A) M68K_SET_FC_CALLBACK(A)

 	#else

 		#define m68ki_set_fc(A) CALLBACK_SET_FC(A)

 	#endif

 	#define m68ki_use_data_space() m68ki_address_space = FUNCTION_CODE_USER_DATA

 	#define m68ki_use_program_space() m68ki_address_space = FUNCTION_CODE_USER_PROGRAM

 	#define m68ki_get_address_space() m68ki_address_space

 #else

 	#define m68ki_set_fc(A)

 	#define m68ki_use_data_space()

 	#define m68ki_use_program_space()

 	#define m68ki_get_address_space() FUNCTION_CODE_USER_DATA

 #endif /* M68K_EMULATE_FC */

 /* Enable or disable trace emulation */

 #if M68K_EMULATE_TRACE

 	/* Initiates trace checking before each instruction (t1) */

 	#define m68ki_trace_t1() m68ki_tracing = FLAG_T1

 	/* adds t0 to trace checking if we encounter change of flow */

 	#define m68ki_trace_t0() m68ki_tracing |= FLAG_T0

 	/* Clear all tracing */

 	#define m68ki_clear_trace() m68ki_tracing = 0

 	/* Cause a trace exception if we are tracing */

 	#define m68ki_exception_if_trace() if(m68ki_tracing) m68ki_exception_trace()

 #else

 	#define m68ki_trace_t1()

 	#define m68ki_trace_t0()

 	#define m68ki_clear_trace()

 	#define m68ki_exception_if_trace()

 #endif /* M68K_EMULATE_TRACE */

 /* Address error */

 #if M68K_EMULATE_ADDRESS_ERROR

 	extern jmp_buf m68ki_address_error_trap;

 	#define m68ki_set_address_error_trap() if(setjmp(m68ki_address_error_trap)) m68ki_exception_address_error();

 	#define m68ki_check_address_error(A) if((A)&1) longjmp(m68ki_address_error_jump, 1);

 #else

 	#define m68ki_set_address_error_trap()

 	#define m68ki_check_address_error(A)

 #endif /* M68K_ADDRESS_ERROR */

 /* Logging */

 #if M68K_LOG_ENABLE

 	#include <stdio.h>

 	extern FILE* M68K_LOG_FILEHANDLE

 	extern char* m68ki_cpu_names[];

 	#define M68K_DO_LOG(A) if(M68K_LOG_FILEHANDLE) fprintf A

 	#if M68K_LOG_1010_1111

 		#define M68K_DO_LOG_EMU(A) if(M68K_LOG_FILEHANDLE) fprintf A

 	#else

 		#define M68K_DO_LOG_EMU(A)

 	#endif

 #else

 	#define M68K_DO_LOG(A)

 	#define M68K_DO_LOG_EMU(A)

 #endif

 /* -------------------------- EA / Operand Access ------------------------- */

 /*

  * The general instruction format follows this pattern:

  * .... XXX. .... .YYY

  * where XXX is register X and YYY is register Y

  */

 /* Data Register Isolation */

 #define DX (REG_D[(REG_IR >> 9) & 7])

 #define DY (REG_D[REG_IR & 7])

 /* Address Register Isolation */

 #define AX (REG_A[(REG_IR >> 9) & 7])

 #define AY (REG_A[REG_IR & 7])

 /* Effective Address Calculations */

 #define EA_AY_AI_8()   AY                                    /* address register indirect */

 #define EA_AY_AI_16()  EA_AY_AI_8()

 #define EA_AY_AI_32()  EA_AY_AI_8()

 #define EA_AY_PI_8()   (AY++)                                /* postincrement (size = byte) */

 #define EA_AY_PI_16()  ((AY+=2)-2)                           /* postincrement (size = word) */

 #define EA_AY_PI_32()  ((AY+=4)-4)                           /* postincrement (size = long) */

 #define EA_AY_PD_8()   (--AY)                                /* predecrement (size = byte) */

 #define EA_AY_PD_16()  (AY-=2)                               /* predecrement (size = word) */

 #define EA_AY_PD_32()  (AY-=4)                               /* predecrement (size = long) */

 #define EA_AY_DI_8()   (AY+MAKE_INT_16(m68ki_read_imm_16())) /* displacement */

 #define EA_AY_DI_16()  EA_AY_DI_8()

 #define EA_AY_DI_32()  EA_AY_DI_8()

 #define EA_AY_IX_8()   m68ki_get_ea_ix(AY)                   /* indirect + index */

 #define EA_AY_IX_16()  EA_AY_IX_8()

 #define EA_AY_IX_32()  EA_AY_IX_8()

 #define EA_AX_AI_8()   AX

 #define EA_AX_AI_16()  EA_AX_AI_8()

 #define EA_AX_AI_32()  EA_AX_AI_8()

 #define EA_AX_PI_8()   (AX++)

 #define EA_AX_PI_16()  ((AX+=2)-2)

 #define EA_AX_PI_32()  ((AX+=4)-4)

 #define EA_AX_PD_8()   (--AX)

 #define EA_AX_PD_16()  (AX-=2)

 #define EA_AX_PD_32()  (AX-=4)

 #define EA_AX_DI_8()   (AX+MAKE_INT_16(m68ki_read_imm_16()))

 #define EA_AX_DI_16()  EA_AX_DI_8()

 #define EA_AX_DI_32()  EA_AX_DI_8()

 #define EA_AX_IX_8()   m68ki_get_ea_ix(AX)

 #define EA_AX_IX_16()  EA_AX_IX_8()

 #define EA_AX_IX_32()  EA_AX_IX_8()

 #define EA_A7_PI_8()   ((REG_A[7]+=2)-2)

 #define EA_A7_PD_8()   (REG_A[7]-=2)

 #define EA_AW_8()      MAKE_INT_16(m68ki_read_imm_16())      /* absolute word */

 #define EA_AW_16()     EA_AW_8()

 #define EA_AW_32()     EA_AW_8()

 #define EA_AL_8()      m68ki_read_imm_32()                   /* absolute long */

 #define EA_AL_16()     EA_AL_8()

 #define EA_AL_32()     EA_AL_8()

 #define EA_PCDI_8()    m68ki_get_ea_pcdi()                   /* pc indirect + displacement */

 #define EA_PCDI_16()   EA_PCDI_8()

 #define EA_PCDI_32()   EA_PCDI_8()

 #define EA_PCIX_8()    m68ki_get_ea_pcix()                   /* pc indirect + index */

 #define EA_PCIX_16()   EA_PCIX_8()

 #define EA_PCIX_32()   EA_PCIX_8()

 #define OPER_I_8()     m68ki_read_imm_8()

 #define OPER_I_16()    m68ki_read_imm_16()

 #define OPER_I_32()    m68ki_read_imm_32()

 /* --------------------------- Status Register ---------------------------- */

 /* Flag Calculation Macros */

 #define CFLAG_8(A) (A)

 #define CFLAG_16(A) ((A)>>8)

 #if M68K_INT_GT_32_BIT

 	#define CFLAG_ADD_32(S, D, R) ((R)>>24)

 	#define CFLAG_SUB_32(S, D, R) ((R)>>24)

 #else

 	#define CFLAG_ADD_32(S, D, R) (((S & D) | (~R & (S | D)))>>23)

 	#define CFLAG_SUB_32(S, D, R) (((S & R) | (~D & (S | R)))>>23)

 #endif /* M68K_INT_GT_32_BIT */

 #define VFLAG_ADD_8(S, D, R) ((S^R) & (D^R))

 #define VFLAG_ADD_16(S, D, R) (((S^R) & (D^R))>>8)

 #define VFLAG_ADD_32(S, D, R) (((S^R) & (D^R))>>24)

 #define VFLAG_SUB_8(S, D, R) ((S^D) & (R^D))

 #define VFLAG_SUB_16(S, D, R) (((S^D) & (R^D))>>8)

 #define VFLAG_SUB_32(S, D, R) (((S^D) & (R^D))>>24)

 #define NFLAG_8(A) (A)

 #define NFLAG_16(A) ((A)>>8)

 #define NFLAG_32(A) ((A)>>24)

 #define NFLAG_64(A) ((A)>>56)

 #define ZFLAG_8(A) MASK_OUT_ABOVE_8(A)

 #define ZFLAG_16(A) MASK_OUT_ABOVE_16(A)

 #define ZFLAG_32(A) MASK_OUT_ABOVE_32(A)

 /* Flag values */

 #define NFLAG_SET   0x80

 #define NFLAG_CLEAR 0

 #define CFLAG_SET   0x100

 #define CFLAG_CLEAR 0

 #define XFLAG_SET   0x100

 #define XFLAG_CLEAR 0

 #define VFLAG_SET   0x80

 #define VFLAG_CLEAR 0

 #define ZFLAG_SET   0

 #define ZFLAG_CLEAR 0xffffffff

 #define SFLAG_SET   4

 #define SFLAG_CLEAR 0

 #define MFLAG_SET   2

 #define MFLAG_CLEAR 0

 /* Turn flag values into 1 or 0 */

 #define XFLAG_AS_1() ((FLAG_X>>8)&1)

 #define NFLAG_AS_1() ((FLAG_N>>7)&1)

 #define VFLAG_AS_1() ((FLAG_V>>7)&1)

 #define ZFLAG_AS_1() (!FLAG_Z)

 #define CFLAG_AS_1() ((FLAG_C>>8)&1)

 /* Conditions */

 #define COND_CS() (FLAG_C&0x100)

 #define COND_CC() (!COND_CS())

 #define COND_VS() (FLAG_V&0x80)

 #define COND_VC() (!COND_VS())

 #define COND_NE() FLAG_Z

 #define COND_EQ() (!COND_NE())

 #define COND_MI() (FLAG_N&0x80)

 #define COND_PL() (!COND_MI())

 #define COND_LT() ((FLAG_N^FLAG_V)&0x80)

 #define COND_GE() (!COND_LT())

 #define COND_HI() (COND_CC() && COND_NE())

 #define COND_LS() (COND_CS() || COND_EQ())

 #define COND_GT() (COND_GE() && COND_NE())

 #define COND_LE() (COND_LT() || COND_EQ())

 /* Reversed conditions */

 #define COND_NOT_CS() COND_CC()

 #define COND_NOT_CC() COND_CS()

 #define COND_NOT_VS() COND_VC()

 #define COND_NOT_VC() COND_VS()

 #define COND_NOT_NE() COND_EQ()

 #define COND_NOT_EQ() COND_NE()

 #define COND_NOT_MI() COND_PL()

 #define COND_NOT_PL() COND_MI()

 #define COND_NOT_LT() COND_GE()

 #define COND_NOT_GE() COND_LT()

 #define COND_NOT_HI() COND_LS()

 #define COND_NOT_LS() COND_HI()

 #define COND_NOT_GT() COND_LE()

 #define COND_NOT_LE() COND_GT()

 /* Not real conditions, but here for convenience */

 #define COND_XS() (FLAG_X&0x100)

 #define COND_XC() (!COND_XS)

 /* Get the condition code register */

 #define m68ki_get_ccr() ((COND_XS() >> 4) | \

 						 (COND_MI() >> 4) | \

 						 (COND_EQ() << 2) | \

 						 (COND_VS() >> 6) | \

 						 (COND_CS() >> 8))

 /* Get the status register */

 #define m68ki_get_sr() ( FLAG_T1              | \

 						 FLAG_T0              | \

 						(FLAG_S        << 11) | \

 						(FLAG_M        << 11) | \

 						 FLAG_INT_MASK        | \

 						 m68ki_get_ccr())

 /* ---------------------------- Cycle Counting ---------------------------- */

 #define ADD_CYCLES(A)    m68ki_remaining_cycles += (A)

 #define USE_CYCLES(A)    m68ki_remaining_cycles -= (A)

 #define SET_CYCLES(A)    m68ki_remaining_cycles = A

 #define GET_CYCLES()     m68ki_remaining_cycles

 #define USE_ALL_CYCLES() m68ki_remaining_cycles = 0

 /* ----------------------------- Read / Write ----------------------------- */

 /* Read from the current address space */

 #define m68ki_read_8(A)  m68ki_read_8_fc (A, FLAG_S | m68ki_get_address_space())

 #define m68ki_read_16(A) m68ki_read_16_fc(A, FLAG_S | m68ki_get_address_space())

 #define m68ki_read_32(A) m68ki_read_32_fc(A, FLAG_S | m68ki_get_address_space())

 /* Write to the current data space */

 #define m68ki_write_8(A, V)  m68ki_write_8_fc (A, FLAG_S | FUNCTION_CODE_USER_DATA, V)

 #define m68ki_write_16(A, V) m68ki_write_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)

 #define m68ki_write_32(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)

 /* map read immediate 8 to read immediate 16 */

 #define m68ki_read_imm_8() MASK_OUT_ABOVE_8(m68ki_read_imm_16())

 /* Map PC-relative reads */

 #define m68ki_read_pcrel_8(A) m68k_read_pcrelative_8(A)

 #define m68ki_read_pcrel_16(A) m68k_read_pcrelative_16(A)

 #define m68ki_read_pcrel_32(A) m68k_read_pcrelative_32(A)

 /* Read from the program space */

 #define m68ki_read_program_8(A) 	m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)

 #define m68ki_read_program_16(A) 	m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)

 #define m68ki_read_program_32(A) 	m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)

 /* Read from the data space */

 #define m68ki_read_data_8(A) 	m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)

 #define m68ki_read_data_16(A) 	m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)

 #define m68ki_read_data_32(A) 	m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)

 /* ======================================================================== */

 /* =============================== PROTOTYPES ============================= */

 /* ======================================================================== */

 typedef struct

 {

 	uint cpu_type;     /* CPU Type: 68000, 68010, 68EC020, or 68020 */

 	uint dar[16];      /* Data and Address Registers */

 	uint ppc;		   /* Previous program counter */

 	uint pc;           /* Program Counter */

 	uint sp[7];        /* User, Interrupt, and Master Stack Pointers */

 	uint vbr;          /* Vector Base Register (m68010+) */

 	uint sfc;          /* Source Function Code Register (m68010+) */

 	uint dfc;          /* Destination Function Code Register (m68010+) */

 	uint cacr;         /* Cache Control Register (m68020, unemulated) */

 	uint caar;         /* Cache Address Register (m68020, unemulated) */

 	uint ir;           /* Instruction Register */

 	uint t1_flag;      /* Trace 1 */

 	uint t0_flag;      /* Trace 0 */

 	uint s_flag;       /* Supervisor */

 	uint m_flag;       /* Master/Interrupt state */

 	uint x_flag;       /* Extend */

 	uint n_flag;       /* Negative */

 	uint not_z_flag;   /* Zero, inverted for speedups */

 	uint v_flag;       /* Overflow */

 	uint c_flag;       /* Carry */

 	uint int_mask;     /* I0-I2 */

 	uint int_level;    /* State of interrupt pins IPL0-IPL2 -- ASG: changed from ints_pending */

 	uint int_cycles;   /* ASG: extra cycles from generated interrupts */

 	uint stopped;      /* Stopped state */

 	uint pref_addr;    /* Last prefetch address */

 	uint pref_data;    /* Data in the prefetch queue */

 	uint address_mask; /* Available address pins */

 	uint sr_mask;      /* Implemented status register bits */

 	uint bus_error_occurred;

 	/* Clocks required for instructions / exceptions */

 	uint cyc_bcc_notake_b;

 	uint cyc_bcc_notake_w;

 	uint cyc_dbcc_f_noexp;

 	uint cyc_dbcc_f_exp;

 	uint cyc_scc_r_false;

 	uint cyc_movem_w;

 	uint cyc_movem_l;

 	uint cyc_shift;

 	uint cyc_reset;

 	uint8* cyc_instruction;

 	uint8* cyc_exception;

 	/* Callbacks to host */

 	int  (*int_ack_callback)(int int_line);           /* Interrupt Acknowledge */

 	void (*bkpt_ack_callback)(unsigned int data);     /* Breakpoint Acknowledge */

 	void (*reset_instr_callback)(void);               /* Called when a RESET instruction is encountered */

 	void (*pc_changed_callback)(unsigned int new_pc); /* Called when the PC changes by a large amount */

 	void (*set_fc_callback)(unsigned int new_fc);     /* Called when the CPU function code changes */

 	void (*instr_hook_callback)(void);                /* Called every instruction cycle prior to execution */

 } m68ki_cpu_core;

 extern m68ki_cpu_core m68ki_cpu;

 extern sint           m68ki_remaining_cycles;

 extern uint           m68ki_tracing;

 extern uint8          m68ki_shift_8_table[];

 extern uint16         m68ki_shift_16_table[];

 extern uint           m68ki_shift_32_table[];

 extern uint8          m68ki_exception_cycle_table[][256];

 extern uint           m68ki_address_space;

 extern uint8          m68ki_ea_idx_cycle_table[];

 /* Read data immediately after the program counter */

 INLINE uint m68ki_read_imm_16(void);

 INLINE uint m68ki_read_imm_32(void);

 /* Read data with specific function code */

 INLINE uint m68ki_read_8_fc  (uint address, uint fc);

 INLINE uint m68ki_read_16_fc (uint address, uint fc);

 INLINE uint m68ki_read_32_fc (uint address, uint fc);

 /* Write data with specific function code */

 INLINE void m68ki_write_8_fc (uint address, uint fc, uint value);

 INLINE void m68ki_write_16_fc(uint address, uint fc, uint value);

 INLINE void m68ki_write_32_fc(uint address, uint fc, uint value);

 /* Indexed and PC-relative ea fetching */

 INLINE uint m68ki_get_ea_pcdi(void);

 INLINE uint m68ki_get_ea_pcix(void);

 INLINE uint m68ki_get_ea_ix(uint An);

 /* Operand fetching */

 INLINE uint OPER_AY_AI_8(void);

 INLINE uint OPER_AY_AI_16(void);

 INLINE uint OPER_AY_AI_32(void);

 INLINE uint OPER_AY_PI_8(void);

 INLINE uint OPER_AY_PI_16(void);

 INLINE uint OPER_AY_PI_32(void);

 INLINE uint OPER_AY_PD_8(void);

 INLINE uint OPER_AY_PD_16(void);

 INLINE uint OPER_AY_PD_32(void);

 INLINE uint OPER_AY_DI_8(void);

 INLINE uint OPER_AY_DI_16(void);

 INLINE uint OPER_AY_DI_32(void);

 INLINE uint OPER_AY_IX_8(void);

 INLINE uint OPER_AY_IX_16(void);

 INLINE uint OPER_AY_IX_32(void);

 INLINE uint OPER_AX_AI_8(void);

 INLINE uint OPER_AX_AI_16(void);

 INLINE uint OPER_AX_AI_32(void);

 INLINE uint OPER_AX_PI_8(void);

 INLINE uint OPER_AX_PI_16(void);

 INLINE uint OPER_AX_PI_32(void);

 INLINE uint OPER_AX_PD_8(void);

 INLINE uint OPER_AX_PD_16(void);

 INLINE uint OPER_AX_PD_32(void);

 INLINE uint OPER_AX_DI_8(void);

 INLINE uint OPER_AX_DI_16(void);

 INLINE uint OPER_AX_DI_32(void);

 INLINE uint OPER_AX_IX_8(void);

 INLINE uint OPER_AX_IX_16(void);

 INLINE uint OPER_AX_IX_32(void);

 INLINE uint OPER_A7_PI_8(void);

 INLINE uint OPER_A7_PD_8(void);

 INLINE uint OPER_AW_8(void);

 INLINE uint OPER_AW_16(void);

 INLINE uint OPER_AW_32(void);

 INLINE uint OPER_AL_8(void);

 INLINE uint OPER_AL_16(void);

 INLINE uint OPER_AL_32(void);

 INLINE uint OPER_PCDI_8(void);

 INLINE uint OPER_PCDI_16(void);

 INLINE uint OPER_PCDI_32(void);

 INLINE uint OPER_PCIX_8(void);

 INLINE uint OPER_PCIX_16(void);

 INLINE uint OPER_PCIX_32(void);

 /* Stack operations */

 INLINE void m68ki_push_16(uint value);

 INLINE void m68ki_push_32(uint value);

 INLINE uint m68ki_pull_16(void);

 INLINE uint m68ki_pull_32(void);

 /* Program flow operations */

 INLINE void m68ki_jump(uint new_pc);

 INLINE void m68ki_jump_vector(uint vector);

 INLINE void m68ki_branch_8(uint offset);

 INLINE void m68ki_branch_16(uint offset);

 INLINE void m68ki_branch_32(uint offset);

 /* Status register operations. */

 INLINE void m68ki_set_s_flag(uint value);            /* Only bit 2 of value should be set (i.e. 4 or 0) */

 INLINE void m68ki_set_sm_flag(uint value);           /* only bits 1 and 2 of value should be set */

 INLINE void m68ki_set_ccr(uint value);               /* set the condition code register */

 INLINE void m68ki_set_sr(uint value);                /* set the status register */

 INLINE void m68ki_set_sr_noint(uint value);          /* set the status register */

 /* Exception processing */

 INLINE uint m68ki_init_exception(void);              /* Initial exception processing */

 INLINE void m68ki_stack_frame_3word(uint pc, uint sr); /* Stack various frame types */

 INLINE void m68ki_stack_frame_buserr(uint pc, uint sr, uint address, uint write, uint instruction, uint fc);

 INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector);

 INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector);

 INLINE void m68ki_stack_frame_0010(uint sr, uint vector);

 INLINE void m68ki_stack_frame_1000(uint pc, uint sr, uint vector);

 INLINE void m68ki_stack_frame_1010(uint sr, uint vector, uint pc);

 INLINE void m68ki_stack_frame_1011(uint sr, uint vector, uint pc);

 INLINE void m68ki_exception_trap(uint vector);

 INLINE void m68ki_exception_trapN(uint vector);

 INLINE void m68ki_exception_trace(void);

 INLINE void m68ki_exception_privilege_violation(void);

 INLINE void m68ki_exception_bus_error(void);

 INLINE void m68ki_exception_1010(void);

 INLINE void m68ki_exception_1111(void);

 INLINE void m68ki_exception_illegal(void);

 INLINE void m68ki_exception_format_error(void);

 INLINE void m68ki_exception_address_error(void);

 INLINE void m68ki_exception_interrupt(uint int_level);

 INLINE void m68ki_check_interrupts(void);            /* ASG: check for interrupts */

 /* quick disassembly (used for logging) */

 char* m68ki_disassemble_quick(unsigned int pc, unsigned int cpu_type);

 /* ======================================================================== */

 /* =========================== UTILITY FUNCTIONS ========================== */

 /* ======================================================================== */

 /* ---------------------------- Read Immediate ---------------------------- */

 /* Handles all immediate reads, does address error check, function code setting,

  * and prefetching if they are enabled in m68kconf.h

  */

 INLINE uint m68ki_read_imm_16(void)

 {

 	m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(REG_PC); /* auto-disable (see m68kcpu.h) */

 #if M68K_EMULATE_PREFETCH

 	if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)

 	{

 		CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);

 		CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));

 	}

 	REG_PC += 2;

 	return MASK_OUT_ABOVE_16(CPU_PREF_DATA >> ((2-((REG_PC-2)&2))<<3));

 #else

 	REG_PC += 2;

 	return m68k_read_immediate_16(ADDRESS_68K(REG_PC-2));

 #endif /* M68K_EMULATE_PREFETCH */

 }

 INLINE uint m68ki_read_imm_32(void)

 {

 #if M68K_EMULATE_PREFETCH

 	uint temp_val;

 	m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(REG_PC); /* auto-disable (see m68kcpu.h) */

 	if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)

 	{

 		CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);

 		CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));

 	}

 	temp_val = CPU_PREF_DATA;

 	REG_PC += 2;

 	if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)

 	{

 		CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);

 		CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));

 		temp_val = MASK_OUT_ABOVE_32((temp_val << 16) | (CPU_PREF_DATA >> 16));

 	}

 	REG_PC += 2;

 	return temp_val;

 #else

 	m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(REG_PC); /* auto-disable (see m68kcpu.h) */

 	REG_PC += 4;

 	return m68k_read_immediate_32(ADDRESS_68K(REG_PC-4));

 #endif /* M68K_EMULATE_PREFETCH */

 }

 /* ------------------------- Top level read/write ------------------------- */

 /* Handles all memory accesses (except for immediate reads if they are

  * configured to use separate functions in m68kconf.h).

  * All memory accesses must go through these top level functions.

  * These functions will also check for address error and set the function

  * code if they are enabled in m68kconf.h.

  */

 INLINE uint m68ki_read_8_fc(uint address, uint fc)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	return m68k_read_memory_8(ADDRESS_68K(address));

 }

 INLINE uint m68ki_read_16_fc(uint address, uint fc)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(address); /* auto-disable (see m68kcpu.h) */

 	return m68k_read_memory_16(ADDRESS_68K(address));

 }

 INLINE uint m68ki_read_32_fc(uint address, uint fc)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(address); /* auto-disable (see m68kcpu.h) */

 	return m68k_read_memory_32(ADDRESS_68K(address));

 }

 INLINE void m68ki_write_8_fc(uint address, uint fc, uint value)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	m68k_write_memory_8(ADDRESS_68K(address), value);

 }

 INLINE void m68ki_write_16_fc(uint address, uint fc, uint value)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(address); /* auto-disable (see m68kcpu.h) */

 	m68k_write_memory_16(ADDRESS_68K(address), value);

 }

 INLINE void m68ki_write_32_fc(uint address, uint fc, uint value)

 {

 	m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */

 	m68ki_check_address_error(address); /* auto-disable (see m68kcpu.h) */

 	m68k_write_memory_32(ADDRESS_68K(address), value);

 }

 /* --------------------- Effective Address Calculation -------------------- */

 /* The program counter relative addressing modes cause operands to be

  * retrieved from program space, not data space.

  */

 INLINE uint m68ki_get_ea_pcdi(void)

 {

 	uint old_pc = REG_PC;

 	m68ki_use_program_space(); /* auto-disable */

 	return old_pc + MAKE_INT_16(m68ki_read_imm_16());

 }

 INLINE uint m68ki_get_ea_pcix(void)

 {

 	m68ki_use_program_space(); /* auto-disable */

 	return m68ki_get_ea_ix(REG_PC);

 }

 /* Indexed addressing modes are encoded as follows:

  *

  * Base instruction format:

  * F E D C B A 9 8 7 6 | 5 4 3 | 2 1 0

  * x x x x x x x x x x | 1 1 0 | BASE REGISTER      (An)

  *

  * Base instruction format for destination EA in move instructions:

  * F E D C | B A 9    | 8 7 6 | 5 4 3 2 1 0

  * x x x x | BASE REG | 1 1 0 | X X X X X X       (An)

  *

  * Brief extension format:

  *  F  |  E D C   |  B  |  A 9  | 8 | 7 6 5 4 3 2 1 0

  * D/A | REGISTER | W/L | SCALE | 0 |  DISPLACEMENT

  *

  * Full extension format:

  *  F     E D C      B     A 9    8   7    6    5 4       3   2 1 0

  * D/A | REGISTER | W/L | SCALE | 1 | BS | IS | BD SIZE | 0 | I/IS

  * BASE DISPLACEMENT (0, 16, 32 bit)                (bd)

  * OUTER DISPLACEMENT (0, 16, 32 bit)               (od)

  *

  * D/A:     0 = Dn, 1 = An                          (Xn)

  * W/L:     0 = W (sign extend), 1 = L              (.SIZE)

  * SCALE:   00=1, 01=2, 10=4, 11=8                  (*SCALE)

  * BS:      0=add base reg, 1=suppress base reg     (An suppressed)

  * IS:      0=add index, 1=suppress index           (Xn suppressed)

  * BD SIZE: 00=reserved, 01=NULL, 10=Word, 11=Long  (size of bd)

  *

  * IS I/IS Operation

  * 0  000  No Memory Indirect

  * 0  001  indir prex with null outer

  * 0  010  indir prex with word outer

  * 0  011  indir prex with long outer

  * 0  100  reserved

  * 0  101  indir postx with null outer

  * 0  110  indir postx with word outer

  * 0  111  indir postx with long outer

  * 1  000  no memory indirect

  * 1  001  mem indir with null outer

  * 1  010  mem indir with word outer

  * 1  011  mem indir with long outer

  * 1  100-111  reserved

  */

 INLINE uint m68ki_get_ea_ix(uint An)

 {

 	/* An = base register */

 	uint extension = m68ki_read_imm_16();

 	uint Xn = 0;                        /* Index register */

 	uint bd = 0;                        /* Base Displacement */

 	uint od = 0;                        /* Outer Displacement */

 	if(CPU_TYPE_IS_010_LESS(CPU_TYPE))

 	{

 		/* Calculate index */

 		Xn = REG_DA[extension>>12];     /* Xn */

 		if(!BIT_B(extension))           /* W/L */

 			Xn = MAKE_INT_16(Xn);

 		/* Add base register and displacement and return */

 		return An + Xn + MAKE_INT_8(extension);

 	}

 	/* Brief extension format */

 	if(!BIT_8(extension))

 	{

 		/* Calculate index */

 		Xn = REG_DA[extension>>12];     /* Xn */

 		if(!BIT_B(extension))           /* W/L */

 			Xn = MAKE_INT_16(Xn);

 		/* Add scale if proper CPU type */

 		if(CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))

 			Xn <<= (extension>>9) & 3;  /* SCALE */

 		/* Add base register and displacement and return */

 		return An + Xn + MAKE_INT_8(extension);

 	}

 	/* Full extension format */

 	USE_CYCLES(m68ki_ea_idx_cycle_table[extension&0x3f]);

 	/* Check if base register is present */

 	if(BIT_7(extension))                /* BS */

 		An = 0;                         /* An */

 	/* Check if index is present */

 	if(!BIT_6(extension))               /* IS */

 	{

 		Xn = REG_DA[extension>>12];     /* Xn */

 		if(!BIT_B(extension))           /* W/L */

 			Xn = MAKE_INT_16(Xn);

 		Xn <<= (extension>>9) & 3;      /* SCALE */

 	}

 	/* Check if base displacement is present */

 	if(BIT_5(extension))                /* BD SIZE */

 		bd = BIT_4(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());

 	/* If no indirect action, we are done */

 	if(!(extension&7))                  /* No Memory Indirect */

 		return An + bd + Xn;

 	/* Check if outer displacement is present */

 	if(BIT_1(extension))                /* I/IS:  od */

 		od = BIT_0(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());

 	/* Postindex */

 	if(BIT_2(extension))                /* I/IS:  0 = preindex, 1 = postindex */

 		return m68ki_read_32(An + bd) + Xn + od;

 	/* Preindex */

 	return m68ki_read_32(An + bd + Xn) + od;

 }

 /* Fetch operands */

 INLINE uint OPER_AY_AI_8(void)  {uint ea = EA_AY_AI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AY_AI_16(void) {uint ea = EA_AY_AI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AY_AI_32(void) {uint ea = EA_AY_AI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AY_PI_8(void)  {uint ea = EA_AY_PI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AY_PI_16(void) {uint ea = EA_AY_PI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AY_PI_32(void) {uint ea = EA_AY_PI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AY_PD_8(void)  {uint ea = EA_AY_PD_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AY_PD_16(void) {uint ea = EA_AY_PD_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AY_PD_32(void) {uint ea = EA_AY_PD_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AY_DI_8(void)  {uint ea = EA_AY_DI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AY_DI_16(void) {uint ea = EA_AY_DI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AY_DI_32(void) {uint ea = EA_AY_DI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AY_IX_8(void)  {uint ea = EA_AY_IX_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AY_IX_16(void) {uint ea = EA_AY_IX_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AY_IX_32(void) {uint ea = EA_AY_IX_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AX_AI_8(void)  {uint ea = EA_AX_AI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AX_AI_16(void) {uint ea = EA_AX_AI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AX_AI_32(void) {uint ea = EA_AX_AI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AX_PI_8(void)  {uint ea = EA_AX_PI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AX_PI_16(void) {uint ea = EA_AX_PI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AX_PI_32(void) {uint ea = EA_AX_PI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AX_PD_8(void)  {uint ea = EA_AX_PD_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AX_PD_16(void) {uint ea = EA_AX_PD_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AX_PD_32(void) {uint ea = EA_AX_PD_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AX_DI_8(void)  {uint ea = EA_AX_DI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AX_DI_16(void) {uint ea = EA_AX_DI_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AX_DI_32(void) {uint ea = EA_AX_DI_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_AX_IX_8(void)  {uint ea = EA_AX_IX_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AX_IX_16(void) {uint ea = EA_AX_IX_16(); return m68ki_read_16(ea);}

 INLINE uint OPER_AX_IX_32(void) {uint ea = EA_AX_IX_32(); return m68ki_read_32(ea);}

 INLINE uint OPER_A7_PI_8(void)  {uint ea = EA_A7_PI_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_A7_PD_8(void)  {uint ea = EA_A7_PD_8();  return m68ki_read_8(ea); }

 INLINE uint OPER_AW_8(void)     {uint ea = EA_AW_8();     return m68ki_read_8(ea); }

 INLINE uint OPER_AW_16(void)    {uint ea = EA_AW_16();    return m68ki_read_16(ea);}

 INLINE uint OPER_AW_32(void)    {uint ea = EA_AW_32();    return m68ki_read_32(ea);}

 INLINE uint OPER_AL_8(void)     {uint ea = EA_AL_8();     return m68ki_read_8(ea); }

 INLINE uint OPER_AL_16(void)    {uint ea = EA_AL_16();    return m68ki_read_16(ea);}

 INLINE uint OPER_AL_32(void)    {uint ea = EA_AL_32();    return m68ki_read_32(ea);}

 INLINE uint OPER_PCDI_8(void)   {uint ea = EA_PCDI_8();   return m68ki_read_pcrel_8(ea); }

 INLINE uint OPER_PCDI_16(void)  {uint ea = EA_PCDI_16();  return m68ki_read_pcrel_16(ea);}

 INLINE uint OPER_PCDI_32(void)  {uint ea = EA_PCDI_32();  return m68ki_read_pcrel_32(ea);}

 INLINE uint OPER_PCIX_8(void)   {uint ea = EA_PCIX_8();   return m68ki_read_pcrel_8(ea); }

 INLINE uint OPER_PCIX_16(void)  {uint ea = EA_PCIX_16();  return m68ki_read_pcrel_16(ea);}

 INLINE uint OPER_PCIX_32(void)  {uint ea = EA_PCIX_32();  return m68ki_read_pcrel_32(ea);}

 /* ---------------------------- Stack Functions --------------------------- */

 /* Push/pull data from the stack */

 INLINE void m68ki_push_16(uint value)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);

 	m68ki_write_16(REG_SP, value);

 }

 INLINE void m68ki_push_32(uint value)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);

 	m68ki_write_32(REG_SP, value);

 }

 INLINE uint m68ki_pull_16(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);

 	return m68ki_read_16(REG_SP-2);

 }

 INLINE uint m68ki_pull_32(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);

 	return m68ki_read_32(REG_SP-4);

 }

 /* Increment/decrement the stack as if doing a push/pull but

  * don't do any memory access.

  */

 INLINE void m68ki_fake_push_16(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);

 }

 INLINE void m68ki_fake_push_32(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);

 }

 INLINE void m68ki_fake_pull_16(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);

 }

 INLINE void m68ki_fake_pull_32(void)

 {

 	REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);

 }

 /* ----------------------------- Program Flow ----------------------------- */

 /* Jump to a new program location or vector.

  * These functions will also call the pc_changed callback if it was enabled

  * in m68kconf.h.

  */

 INLINE void m68ki_jump(uint new_pc)

 {

 	REG_PC = new_pc;

 	m68ki_pc_changed(REG_PC);

 }

 INLINE void m68ki_jump_vector(uint vector)

 {

 	REG_PC = (vector<<2) + REG_VBR;

 	REG_PC = m68ki_read_data_32(REG_PC);

 	m68ki_pc_changed(REG_PC);

 }

 /* Branch to a new memory location.

  * The 32-bit branch will call pc_changed if it was enabled in m68kconf.h.

  * So far I've found no problems with not calling pc_changed for 8 or 16

  * bit branches.

  */

 INLINE void m68ki_branch_8(uint offset)

 {

 	REG_PC += MAKE_INT_8(offset);

 }

 INLINE void m68ki_branch_16(uint offset)

 {

 	REG_PC += MAKE_INT_16(offset);

 }

 INLINE void m68ki_branch_32(uint offset)

 {

 	REG_PC += offset;

 	m68ki_pc_changed(REG_PC);

 }

 /* ---------------------------- Status Register --------------------------- */

 /* Set the S flag and change the active stack pointer.

  * Note that value MUST be 4 or 0.

  */

 INLINE void m68ki_set_s_flag(uint value)

 {

 	/* Backup the old stack pointer */

 	REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;

 	/* Set the S flag */

 	FLAG_S = value;

 	/* Set the new stack pointer */

 	REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];

 }

 /* Set the S and M flags and change the active stack pointer.

  * Note that value MUST be 0, 2, 4, or 6 (bit2 = S, bit1 = M).

  */

 INLINE void m68ki_set_sm_flag(uint value)

 {

 	/* Backup the old stack pointer */

 	REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;

 	/* Set the S and M flags */

 	FLAG_S = value & SFLAG_SET;

 	FLAG_M = value & MFLAG_SET;

 	/* Set the new stack pointer */

 	REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];

 }

 /* Set the condition code register */

 INLINE void m68ki_set_ccr(uint value)

 {

 	FLAG_X = BIT_4(value)  << 4;

 	FLAG_N = BIT_3(value)  << 4;

 	FLAG_Z = !BIT_2(value);

 	FLAG_V = BIT_1(value)  << 6;

 	FLAG_C = BIT_0(value)  << 8;

 }

 /* Set the status register but don't check for interrupts */

 INLINE void m68ki_set_sr_noint(uint value)

 {

 	/* Mask out the "unimplemented" bits */

 	value &= CPU_SR_MASK;

 	/* Now set the status register */

 	FLAG_T1 = BIT_F(value);

 	FLAG_T0 = BIT_E(value);

 	FLAG_INT_MASK = value & 0x0700;

 	m68ki_set_ccr(value);

 	m68ki_set_sm_flag((value >> 11) & 6);

 }

 /* Set the status register and check for interrupts */

 INLINE void m68ki_set_sr(uint value)

 {

 	m68ki_set_sr_noint(value);

 	m68ki_check_interrupts();

 }

 /* ------------------------- Exception Processing ------------------------- */

 /* Initiate exception processing */

 INLINE uint m68ki_init_exception(void)

 {

 	/* Save the old status register */

 	uint sr = m68ki_get_sr();

 	/* Turn off trace flag, clear pending traces */

 	FLAG_T1 = FLAG_T0 = 0;

 	m68ki_clear_trace();

 	/* Enter supervisor mode */

 	m68ki_set_s_flag(SFLAG_SET);

 	return sr;

 }

 /* 3 word stack frame (68000 only) */

 INLINE void m68ki_stack_frame_3word(uint pc, uint sr)

 {

 	m68ki_push_32(pc);

 	m68ki_push_16(sr);

 }

 /* Format 0 stack frame.

  * This is the standard stack frame for 68010+.

  */

 INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector)

 {

 	/* Stack a 3-word frame if we are 68000 */

 	if(CPU_TYPE == CPU_TYPE_000)

 	{

 		m68ki_stack_frame_3word(pc, sr);

 		return;

 	}

 	m68ki_push_16(vector<<2);

 	m68ki_push_32(pc);

 	m68ki_push_16(sr);

 }

 /* Format 1 stack frame (68020).

  * For 68020, this is the 4 word throwaway frame.

  */

 INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector)

 {

 	m68ki_push_16(0x1000 | (vector<<2));

 	m68ki_push_32(pc);

 	m68ki_push_16(sr);

 }

 /* Format 2 stack frame.

  * This is used only by 68020 for trap exceptions.

  */

 INLINE void m68ki_stack_frame_0010(uint sr, uint vector)

 {

 	m68ki_push_32(REG_PPC);

 	m68ki_push_16(0x2000 | (vector<<2));

 	m68ki_push_32(REG_PC);

 	m68ki_push_16(sr);

 }

 /* Bus error stack frame (68000 only).

  */

 INLINE void m68ki_stack_frame_buserr(uint pc, uint sr, uint address, uint write, uint instruction, uint fc)

 {

 	m68ki_push_32(pc);

 	m68ki_push_16(sr);

 	m68ki_push_16(REG_IR);

 	m68ki_push_32(address);	/* access address */

 	/* 0 0 0 0 0 0 0 0 0 0 0 R/W I/N FC

 	 * R/W  0 = write, 1 = read

 	 * I/N  0 = instruction, 1 = not

 	 * FC   3-bit function code

 	 */

 	m68ki_push_16(((!write)<<4) | ((!instruction)<<3) | fc);

 }

 /* Format 8 stack frame (68010).

  * 68010 only.  This is the 29 word bus/address error frame.

  */

 void m68ki_stack_frame_1000(uint pc, uint sr, uint vector)

 {

 	/* VERSION

 	 * NUMBER

 	 * INTERNAL INFORMATION, 16 WORDS

 	 */

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	m68ki_fake_push_32();

 	/* INSTRUCTION INPUT BUFFER */

 	m68ki_push_16(0);

 	/* UNUSED, RESERVED (not written) */

 	m68ki_fake_push_16();

 	/* DATA INPUT BUFFER */

 	m68ki_push_16(0);

 	/* UNUSED, RESERVED (not written) */

 	m68ki_fake_push_16();

 	/* DATA OUTPUT BUFFER */

 	m68ki_push_16(0);

 	/* UNUSED, RESERVED (not written) */

 	m68ki_fake_push_16();

 	/* FAULT ADDRESS */

 	m68ki_push_32(0);

 	/* SPECIAL STATUS WORD */

 	m68ki_push_16(0);

 	/* 1000, VECTOR OFFSET */

 	m68ki_push_16(0x8000 | (vector<<2));

 	/* PROGRAM COUNTER */

 	m68ki_push_32(pc);

 	/* STATUS REGISTER */

 	m68ki_push_16(sr);

 }

 /* Format A stack frame (short bus fault).

  * This is used only by 68020 for bus fault and address error

  * if the error happens at an instruction boundary.

  * PC stacked is address of next instruction.

  */

 void m68ki_stack_frame_1010(uint sr, uint vector, uint pc)

 {

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* DATA OUTPUT BUFFER (2 words) */

 	m68ki_push_32(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* DATA CYCLE FAULT ADDRESS (2 words) */

 	m68ki_push_32(0);

 	/* INSTRUCTION PIPE STAGE B */

 	m68ki_push_16(0);

 	/* INSTRUCTION PIPE STAGE C */

 	m68ki_push_16(0);

 	/* SPECIAL STATUS REGISTER */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* 1010, VECTOR OFFSET */

 	m68ki_push_16(0xa000 | (vector<<2));

 	/* PROGRAM COUNTER */

 	m68ki_push_32(pc);

 	/* STATUS REGISTER */

 	m68ki_push_16(sr);

 }

 /* Format B stack frame (long bus fault).

  * This is used only by 68020 for bus fault and address error

  * if the error happens during instruction execution.

  * PC stacked is address of instruction in progress.

  */

 void m68ki_stack_frame_1011(uint sr, uint vector, uint pc)

 {

 	/* INTERNAL REGISTERS (18 words) */

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	/* VERSION# (4 bits), INTERNAL INFORMATION */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTERS (3 words) */

 	m68ki_push_32(0);

 	m68ki_push_16(0);

 	/* DATA INTPUT BUFFER (2 words) */

 	m68ki_push_32(0);

 	/* INTERNAL REGISTERS (2 words) */

 	m68ki_push_32(0);

 	/* STAGE B ADDRESS (2 words) */

 	m68ki_push_32(0);

 	/* INTERNAL REGISTER (4 words) */

 	m68ki_push_32(0);

 	m68ki_push_32(0);

 	/* DATA OUTPUT BUFFER (2 words) */

 	m68ki_push_32(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* DATA CYCLE FAULT ADDRESS (2 words) */

 	m68ki_push_32(0);

 	/* INSTRUCTION PIPE STAGE B */

 	m68ki_push_16(0);

 	/* INSTRUCTION PIPE STAGE C */

 	m68ki_push_16(0);

 	/* SPECIAL STATUS REGISTER */

 	m68ki_push_16(0);

 	/* INTERNAL REGISTER */

 	m68ki_push_16(0);

 	/* 1011, VECTOR OFFSET */

 	m68ki_push_16(0xb000 | (vector<<2));

 	/* PROGRAM COUNTER */

 	m68ki_push_32(pc);

 	/* STATUS REGISTER */

 	m68ki_push_16(sr);

 }

 /* Used for Group 2 exceptions.

  * These stack a type 2 frame on the 020.

  */

 INLINE void m68ki_exception_trap(uint vector)

 {

 	uint sr = m68ki_init_exception();

 	if(CPU_TYPE_IS_010_LESS(CPU_TYPE))

 		m68ki_stack_frame_0000(REG_PC, sr, vector);

 	else

 		m68ki_stack_frame_0010(sr, vector);

 	m68ki_jump_vector(vector);

 	/* Use up some clock cycles */

 	USE_CYCLES(CYC_EXCEPTION[vector]);

 }

 /* Trap#n stacks a 0 frame but behaves like group2 otherwise */

 INLINE void m68ki_exception_trapN(uint vector)

 {

 	uint sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC, sr, vector);

 	m68ki_jump_vector(vector);

 	/* Use up some clock cycles */

 	USE_CYCLES(CYC_EXCEPTION[vector]);

 }

 /* Exception for trace mode */

 INLINE void m68ki_exception_trace(void)

 {

 	uint sr = m68ki_init_exception();

 	if(CPU_TYPE_IS_010_LESS(CPU_TYPE))

 		m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_TRACE);

 	else

 		m68ki_stack_frame_0010(sr, EXCEPTION_TRACE);

 	m68ki_jump_vector(EXCEPTION_TRACE);

 	/* Trace nullifies a STOP instruction */

 	CPU_STOPPED &= ~STOP_LEVEL_STOP;

 	/* Use up some clock cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_TRACE]);

 }

 /* Exception for privilege violation */

 INLINE void m68ki_exception_privilege_violation(void)

 {

 	uint sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_PRIVILEGE_VIOLATION);

 	m68ki_jump_vector(EXCEPTION_PRIVILEGE_VIOLATION);

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_PRIVILEGE_VIOLATION] - CYC_INSTRUCTION[REG_IR]);

 }

 /* Exception for bus error */

 INLINE void m68ki_exception_bus_error(void)

 {

 	BUS_ERROR_OCCURRED = 1;

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_BUS_ERROR] - CYC_INSTRUCTION[REG_IR]);

 }

 INLINE void m68ki_jump_bus_error_vector(void)

 {

 	uint sr = m68ki_init_exception();

 	m68ki_stack_frame_1000(REG_PPC, sr, EXCEPTION_BUS_ERROR);

 	m68ki_jump_vector(EXCEPTION_BUS_ERROR);

 }

 /* Exception for A-Line instructions */

 INLINE void m68ki_exception_1010(void)

 {

 	uint sr;

 #if M68K_LOG_1010_1111 == OPT_ON

 	M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1010 instruction %04x (%s)\n",

 					 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,

 					 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));

 #endif

 	sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC-2, sr, EXCEPTION_1010);

 	m68ki_jump_vector(EXCEPTION_1010);

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1010] - CYC_INSTRUCTION[REG_IR]);

 }

 /* Exception for F-Line instructions */

 INLINE void m68ki_exception_1111(void)

 {

 	uint sr;

 #if M68K_LOG_1010_1111 == OPT_ON

 	M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1111 instruction %04x (%s)\n",

 					 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,

 					 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));

 #endif

 	sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC-2, sr, EXCEPTION_1111);

 	m68ki_jump_vector(EXCEPTION_1111);

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1111] - CYC_INSTRUCTION[REG_IR]);

 }

 /* Exception for illegal instructions */

 INLINE void m68ki_exception_illegal(void)

 {

 	uint sr;

 	M68K_DO_LOG((M68K_LOG_FILEHANDLE "%s at %08x: illegal instruction %04x (%s)\n",

 				 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,

 				 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));

 	sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_ILLEGAL_INSTRUCTION);

 	m68ki_jump_vector(EXCEPTION_ILLEGAL_INSTRUCTION);

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ILLEGAL_INSTRUCTION] - CYC_INSTRUCTION[REG_IR]);

 }

 /* Exception for format errror in RTE */

 INLINE void m68ki_exception_format_error(void)

 {

 	uint sr = m68ki_init_exception();

 	m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_FORMAT_ERROR);

 	m68ki_jump_vector(EXCEPTION_FORMAT_ERROR);

 	/* Use up some clock cycles and undo the instruction's cycles */

 	USE_CYCLES(CYC_EXCEPTION[EXCEPTION_FORMAT_ERROR] - CYC_INSTRUCTION[REG_IR]);

 }

 /* Exception for address error */

 INLINE void m68ki_exception_address_error(void)

 {

 	/* Not emulated yet */

 }

 /* Service an interrupt request and start exception processing */

 void m68ki_exception_interrupt(uint int_level)

 {

 	uint vector;

 	uint sr;

 	uint new_pc;

 	/* Turn off the stopped state */

 	CPU_STOPPED &= ~STOP_LEVEL_STOP;

 	/* If we are halted, don't do anything */

 	if(CPU_STOPPED)

 		return;

 	/* Acknowledge the interrupt */

 	vector = m68ki_int_ack(int_level);

 	/* Get the interrupt vector */

 	if(vector == M68K_INT_ACK_AUTOVECTOR)

 		/* Use the autovectors.  This is the most commonly used implementation */

 		vector = EXCEPTION_INTERRUPT_AUTOVECTOR+int_level;

 	else if(vector == M68K_INT_ACK_SPURIOUS)

 		/* Called if no devices respond to the interrupt acknowledge */

 		vector = EXCEPTION_SPURIOUS_INTERRUPT;

 	else if(vector > 255)

 	{

 		M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: Interrupt acknowledge returned invalid vector $%x\n",

 				 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PC), vector));

 		return;

 	}

 	/* Start exception processing */

 	sr = m68ki_init_exception();

 	/* Set the interrupt mask to the level of the one being serviced */

 	FLAG_INT_MASK = int_level<<8;

 	/* Get the new PC */

 	new_pc = m68ki_read_data_32((vector<<2) + REG_VBR);

 	/* If vector is uninitialized, call the uninitialized interrupt vector */

 	if(new_pc == 0)

 		new_pc = m68ki_read_data_32((EXCEPTION_UNINITIALIZED_INTERRUPT<<2) + REG_VBR);

 	/* Generate a stack frame */

 	m68ki_stack_frame_0000(REG_PC, sr, vector);

 	if(FLAG_M && CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))

 	{

 		/* Create throwaway frame */

 		m68ki_set_sm_flag(FLAG_S);	/* clear M */

 		sr |= 0x2000; /* Same as SR in master stack frame except S is forced high */

 		m68ki_stack_frame_0001(REG_PC, sr, vector);

 	}

 	m68ki_jump(new_pc);

 	/* Defer cycle counting until later */

 	CPU_INT_CYCLES += CYC_EXCEPTION[vector];

 #if !M68K_EMULATE_INT_ACK

 	/* Automatically clear IRQ if we are not using an acknowledge scheme */

 	CPU_INT_LEVEL = 0;

 #endif /* M68K_EMULATE_INT_ACK */

 }

 /* ASG: Check for interrupts */

 INLINE void m68ki_check_interrupts(void)

 {

 	if(CPU_INT_LEVEL > FLAG_INT_MASK)

 		m68ki_exception_interrupt(CPU_INT_LEVEL>>8);

 }

 /* ======================================================================== */

 /* ============================== END OF FILE ============================= */

 /* ======================================================================== */

 #endif /* M68KCPU__HEADER */