condrv.c File Reference

#include "ntvdm.h"
#include <debug.h>
#include "emulator.h"
#include "dos.h"
#include "dos/dem.h"
#include "bios/bios.h"

Include dependency graph for condrv.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
WORD NTAPI	ConDrvReadInput (PDOS_DEVICE_NODE Device, DWORD Buffer, PWORD Length)
WORD NTAPI	ConDrvInputStatus (PDOS_DEVICE_NODE Device)
WORD NTAPI	ConDrvWriteOutput (PDOS_DEVICE_NODE Device, DWORD Buffer, PWORD Length)
WORD NTAPI	ConDrvOpen (PDOS_DEVICE_NODE Device)
WORD NTAPI	ConDrvClose (PDOS_DEVICE_NODE Device)
VOID	ConDrvInitialize (VOID)
VOID	ConDrvCleanup (VOID)

Variables
PDOS_DEVICE_NODE	Con = NULL
BYTE	ExtendedCode = 0

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 14 of file condrv.c.

Function Documentation

ConDrvCleanup()

VOID ConDrvCleanup

(

VOID

)

Definition at line 147 of file condrv.c.

{
    if (Con) DosDeleteDevice(Con);
}

ConDrvClose()

WORD NTAPI ConDrvClose

(

PDOS_DEVICE_NODE

Device

)

Definition at line 124 of file condrv.c.

{
    DPRINT("Handle to %Z closed\n", &Device->Name);
    return DOS_DEVSTAT_DONE;
}

Referenced by ConDrvInitialize(), and DriverEntry().

ConDrvInitialize()

VOID ConDrvInitialize

(

VOID

)

Definition at line 132 of file condrv.c.

{
    Con = DosCreateDevice(DOS_DEVATTR_STDIN
                          | DOS_DEVATTR_STDOUT
                          | DOS_DEVATTR_CON
                          | DOS_DEVATTR_CHARACTER,
                          "CON");
 
    Con->ReadRoutine        = ConDrvReadInput;
    Con->InputStatusRoutine = ConDrvInputStatus;
    Con->WriteRoutine       = ConDrvWriteOutput;
    Con->OpenRoutine        = ConDrvOpen;
    Con->CloseRoutine       = ConDrvClose;
}

Referenced by DosKRNLInitialize().

ConDrvInputStatus()

WORD NTAPI ConDrvInputStatus

(

PDOS_DEVICE_NODE

Device

)

Definition at line 79 of file condrv.c.

{
    /* Save AX */
    USHORT AX = getAX();
 
    /* Call the BIOS */
    setAH(0x01); // or 0x11 for enhanced, but what to choose?
    Int32Call(&DosContext, BIOS_KBD_INTERRUPT);
 
    /* Restore AX */
    setAX(AX);
 
    /* If ZF is set, set the busy bit */
    if (getZF() && !ExtendedCode) return DOS_DEVSTAT_BUSY;
    else return DOS_DEVSTAT_DONE;
}

Referenced by ConDrvInitialize().

ConDrvOpen()

WORD NTAPI ConDrvOpen

(

PDOS_DEVICE_NODE

Device

)

Definition at line 118 of file condrv.c.

{
    DPRINT("Handle to %Z opened\n", &Device->Name);
    return DOS_DEVSTAT_DONE;
}

Referenced by ConDrvInitialize().

ConDrvReadInput()

WORD NTAPI ConDrvReadInput	(	PDOS_DEVICE_NODE	Device,
		DWORD	Buffer,
		PWORD	Length
	)

Definition at line 31 of file condrv.c.

{
    CHAR Character;
    WORD BytesRead = 0;
    PCHAR Pointer = (PCHAR)FAR_POINTER(Buffer);
 
    /* Save AX */
    USHORT AX = getAX();
 
    /*
     * Use BIOS Get Keystroke function
     */
    while (BytesRead < *Length)
    {
        if (!ExtendedCode)
        {
            /* Call the BIOS INT 16h, AH=00h "Get Keystroke" */
            setAH(0x00);
            Int32Call(&DosContext, BIOS_KBD_INTERRUPT);
 
            /* Retrieve the character in AL (scan code is in AH) */
            Character = getAL();
        }
        else
        {
            /* Return the extended code */
            Character = ExtendedCode;
 
            /* And then clear it */
            ExtendedCode = 0;
        }
 
        /* Check if this is a special character */
        if (Character == 0) ExtendedCode = getAH();
 
        Pointer[BytesRead++] = Character;
 
        /* Stop on first carriage return */
        if (Character == '\r') break;
    }
 
    *Length = BytesRead;
 
    /* Restore AX */
    setAX(AX);
    return DOS_DEVSTAT_DONE;
}

Referenced by ConDrvInitialize().

ConDrvWriteOutput()

WORD NTAPI ConDrvWriteOutput	(	PDOS_DEVICE_NODE	Device,
		DWORD	Buffer,
		PWORD	Length
	)

Definition at line 96 of file condrv.c.

{
    WORD BytesWritten;
    PCHAR Pointer = (PCHAR)FAR_POINTER(Buffer);
 
    /* Save AX */
    USHORT AX = getAX();
 
    for (BytesWritten = 0; BytesWritten < *Length; BytesWritten++)
    {
        /* Set the character */
        setAL(Pointer[BytesWritten]);
 
        /* Call the BIOS INT 29h "Fast Console Output" function */
        Int32Call(&DosContext, 0x29);
    }
 
    /* Restore AX */
    setAX(AX);
    return DOS_DEVSTAT_DONE;
}

Referenced by ConDrvInitialize().

Variable Documentation

Con

PDOS_DEVICE_NODE Con = NULL

Definition at line 26 of file condrv.c.

Referenced by ClearMixerCache(), ConDrvCleanup(), ConDrvInitialize(), and SndMixerQueryConnections().

ExtendedCode

BYTE ExtendedCode = 0

Definition at line 27 of file condrv.c.

Referenced by ConDrvInputStatus(), and ConDrvReadInput().