#include <fast486.h>

Include dependency graph for cpu.h:

This graph shows which files directly or indirectly include this file:

Macros
#define	EMULATOR_FLAG_CF (1 << 0)

#define	EMULATOR_FLAG_PF (1 << 2)

#define	EMULATOR_FLAG_AF (1 << 4)

#define	EMULATOR_FLAG_ZF (1 << 6)

#define	EMULATOR_FLAG_SF (1 << 7)

#define	EMULATOR_FLAG_TF (1 << 8)

#define	EMULATOR_FLAG_IF (1 << 9)

#define	EMULATOR_FLAG_DF (1 << 10)

#define	EMULATOR_FLAG_OF (1 << 11)

#define	EMULATOR_FLAG_NT (1 << 14)

#define	EMULATOR_FLAG_RF (1 << 16)

#define	EMULATOR_FLAG_VM (1 << 17)

#define	EMULATOR_FLAG_AC (1 << 18)

#define	EMULATOR_FLAG_VIF (1 << 19)

#define	EMULATOR_FLAG_VIP (1 << 20)

#define	EMULATOR_FLAG_ID (1 << 21)

Functions
VOID	CpuExecute (WORD Segment, WORD Offset)

VOID	CpuStep (VOID)

VOID	CpuSimulate (VOID)

VOID	CpuUnsimulate (VOID)

BOOLEAN	CpuInitialize (VOID)

VOID	CpuCleanup (VOID)

Variables
BOOLEAN	CpuRunning

FAST486_STATE	EmulatorContext

Macro Definition Documentation

◆ EMULATOR_FLAG_AC

#define EMULATOR_FLAG_AC (1 << 18)

Definition at line 31 of file cpu.h.

◆ EMULATOR_FLAG_AF

#define EMULATOR_FLAG_AF (1 << 4)

Definition at line 21 of file cpu.h.

◆ EMULATOR_FLAG_CF

#define EMULATOR_FLAG_CF (1 << 0)

Definition at line 19 of file cpu.h.

◆ EMULATOR_FLAG_DF

#define EMULATOR_FLAG_DF (1 << 10)

Definition at line 26 of file cpu.h.

◆ EMULATOR_FLAG_ID

#define EMULATOR_FLAG_ID (1 << 21)

Definition at line 34 of file cpu.h.

◆ EMULATOR_FLAG_IF

#define EMULATOR_FLAG_IF (1 << 9)

Definition at line 25 of file cpu.h.

◆ EMULATOR_FLAG_NT

#define EMULATOR_FLAG_NT (1 << 14)

Definition at line 28 of file cpu.h.

◆ EMULATOR_FLAG_OF

#define EMULATOR_FLAG_OF (1 << 11)

Definition at line 27 of file cpu.h.

◆ EMULATOR_FLAG_PF

#define EMULATOR_FLAG_PF (1 << 2)

Definition at line 20 of file cpu.h.

◆ EMULATOR_FLAG_RF

#define EMULATOR_FLAG_RF (1 << 16)

Definition at line 29 of file cpu.h.

◆ EMULATOR_FLAG_SF

#define EMULATOR_FLAG_SF (1 << 7)

Definition at line 23 of file cpu.h.

◆ EMULATOR_FLAG_TF

#define EMULATOR_FLAG_TF (1 << 8)

Definition at line 24 of file cpu.h.

◆ EMULATOR_FLAG_VIF

#define EMULATOR_FLAG_VIF (1 << 19)

Definition at line 32 of file cpu.h.

◆ EMULATOR_FLAG_VIP

#define EMULATOR_FLAG_VIP (1 << 20)

Definition at line 33 of file cpu.h.

◆ EMULATOR_FLAG_VM

#define EMULATOR_FLAG_VM (1 << 17)

Definition at line 30 of file cpu.h.

◆ EMULATOR_FLAG_ZF

#define EMULATOR_FLAG_ZF (1 << 6)

Definition at line 22 of file cpu.h.

Function Documentation

◆ CpuCleanup()

VOID CpuCleanup ( VOID )

Definition at line 243 of file cpu.c.

{
    // Fast486Cleanup();
}

Referenced by EmulatorCleanup().

◆ CpuExecute()

VOID CpuExecute	(	WORD	Segment,
		WORD	Offset
	)

Definition at line 102 of file cpu.c.

{
    /* Tell Fast486 to move the instruction pointer */
    Fast486ExecuteAt(&EmulatorContext, Segment, Offset);
}

Referenced by DosLoadExecutableInternal(), setEIP(), and setIP().

◆ CpuInitialize()

BOOLEAN CpuInitialize ( VOID )

Definition at line 216 of file cpu.c.

{
    // /* Initialize the internal clock */
    // if (!ClockInitialize())
    // {
        // wprintf(L"FATAL: Failed to initialize the clock\n");
        // return FALSE;
    // }
 
    /* Initialize the CPU */
    Fast486Initialize(&EmulatorContext,
                      EmulatorReadMemory,
                      EmulatorWriteMemory,
                      EmulatorReadIo,
                      EmulatorWriteIo,
                      EmulatorBiosOperation,
                      EmulatorIntAcknowledge,
                      EmulatorFpu,
                      NULL /* TODO: Use a TLB */);
 
    /* Initialize the software callback system and register the emulator BOPs */
    // RegisterBop(BOP_DEBUGGER  , EmulatorDebugBreakBop);
    RegisterBop(BOP_UNSIMULATE, CpuUnsimulateBop);
 
    return TRUE;
}

Referenced by EmulatorInitialize().

◆ CpuSimulate()

VOID CpuSimulate ( VOID )

Definition at line 167 of file cpu.c.

{
    if (CpuCallLevel > MaxCpuCallLevel)
    {
        DisplayMessage(L"Too many CPU levels of recursion (%d, expected maximum %d)",
                       CpuCallLevel, MaxCpuCallLevel);
 
        /* Stop the VDM */
        EmulatorTerminate();
        return;
    }
    CpuCallLevel++;
    DPRINT("CpuSimulate --> Level %d\n", CpuCallLevel);
 
    CpuRunning = TRUE;
    while (VdmRunning && CpuRunning)
    {
        _SEH2_TRY
        {
            while (VdmRunning && CpuRunning) ClockUpdate();
        }
        _SEH2_EXCEPT(CpuExceptionFilter(_SEH2_GetExceptionInformation()))
        {
            DPRINT("VDM exception handler called\n");
        }
        _SEH2_END;
    }
 
    DPRINT("CpuSimulate <-- Level %d\n", CpuCallLevel);
    CpuCallLevel--;
    if (!VdmRunning || CpuCallLevel < 0) CpuCallLevel = 0;
 
    /* This takes into account for reentrance */
    if (VdmRunning && (CpuCallLevel > 0)) CpuRunning = TRUE;
}

Referenced by Call16(), VDDSimulate16(), and wmain().

◆ CpuStep()

VOID CpuStep ( VOID )

Definition at line 108 of file cpu.c.

{
    /* Dump the state for debugging purposes */
    // Fast486DumpState(&EmulatorContext);
 
    /* Execute the next instruction */
    Fast486StepInto(&EmulatorContext);
}

Referenced by ClockUpdate().

◆ CpuUnsimulate()

VOID CpuUnsimulate ( VOID )

Definition at line 203 of file cpu.c.

{
    /* Stop simulation */
    CpuRunning = FALSE;
}

Referenced by CpuUnsimulateBop(), DosTerminateProcess(), and EmulatorTerminate().

Variable Documentation

◆ CpuRunning

BOOLEAN CpuRunning

extern

Definition at line 40 of file cpu.c.

Referenced by ClockUpdate(), CpuSimulate(), and CpuUnsimulate().

◆ EmulatorContext

FAST486_STATE EmulatorContext