Sweden-Number/dlls/winedos/int21.c

188 lines
5.9 KiB
C

/*
* DOS interrupt 21h handler
*/
#include "config.h"
#include "windef.h"
#include "winbase.h"
#include "ntddk.h"
#include "wine/winbase16.h"
#include "dosexe.h"
#include "miscemu.h"
#include "msdos.h"
#include "console.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(int21);
/***********************************************************************
* DOSVM_Int21Handler
*
* int 21h real-mode handler. Most calls are passed directly to DOS3Call.
*/
void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
{
RESET_CFLAG(context); /* Not sure if this is a good idea */
switch(AH_reg(context))
{
case 0x00: /* TERMINATE PROGRAM */
TRACE("TERMINATE PROGRAM\n");
MZ_Exit( context, FALSE, 0 );
break;
case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
AL_reg(context) = CONSOLE_GetCharacter();
/* FIXME: no echo */
break;
case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
TRACE("Write Character to Standard Output\n");
CONSOLE_Write(DL_reg(context), 0, 0, 0);
break;
case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
/* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
if (DL_reg(context) == 0xff) {
static char scan = 0;
TRACE("Direct Console Input\n");
if (scan) {
/* return pending scancode */
AL_reg(context) = scan;
RESET_ZFLAG(context);
scan = 0;
} else {
char ascii;
if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
/* return ASCII code */
AL_reg(context) = ascii;
RESET_ZFLAG(context);
/* return scan code on next call only if ascii==0 */
if (ascii) scan = 0;
} else {
/* nothing pending, clear everything */
AL_reg(context) = 0;
SET_ZFLAG(context);
scan = 0; /* just in case */
}
}
} else {
TRACE("Direct Console Output\n");
CONSOLE_Write(DL_reg(context), 0, 0, 0);
}
break;
case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
break;
case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
/* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
TRACE("CHARACTER INPUT WITHOUT ECHO\n");
DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
break;
case 0x0b: /* GET STDIN STATUS */
{
char x1,x2;
if (CONSOLE_CheckForKeystroke(&x1,&x2))
AL_reg(context) = 0xff;
else
AL_reg(context) = 0;
}
break;
case 0x25: /* SET INTERRUPT VECTOR */
DOSVM_SetRMHandler( AL_reg(context),
(FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
break;
case 0x35: /* GET INTERRUPT VECTOR */
TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
{
FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
context->SegEs = SELECTOROF(addr);
BX_reg(context) = OFFSETOF(addr);
}
break;
case 0x44: /* IOCTL */
switch (AL_reg(context))
{
case 0x0b: /* SET SHARING RETRY COUNT */
TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
CX_reg(context), DX_reg(context));
if (!CX_reg(context))
{
AX_reg(context) = 1;
SET_CFLAG(context);
break;
}
DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
if (!DX_reg(context))
DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
RESET_CFLAG(context);
break;
}
break;
case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
{
AX_reg(context) = GetLastError();
SET_CFLAG(context);
}
break;
case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
TRACE("EXIT with return code %d\n",AL_reg(context));
MZ_Exit( context, FALSE, AL_reg(context) );
break;
case 0x4d: /* GET RETURN CODE */
TRACE("GET RETURN CODE (ERRORLEVEL)\n");
AX_reg(context) = DOSVM_retval;
DOSVM_retval = 0;
break;
case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
DOSVM_psp = BX_reg(context);
break;
case 0x51: /* GET PSP ADDRESS */
TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
/* FIXME: should we return the original DOS PSP upon */
/* Windows startup ? */
BX_reg(context) = DOSVM_psp;
break;
case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
TRACE("SYSVARS - GET LIST OF LISTS\n");
{
context->SegEs = HIWORD(DOS_LOLSeg);
BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
}
break;
case 0x62: /* GET PSP ADDRESS */
TRACE("GET CURRENT PSP ADDRESS\n");
/* FIXME: should we return the original DOS PSP upon */
/* Windows startup ? */
BX_reg(context) = DOSVM_psp;
break;
default:
DOS3Call( context );
}
}