/* * DOS interrupt 21h handler * * Copyright 1993, 1994 Erik Bos * Copyright 1996 Alexandre Julliard * Copyright 1997 Andreas Mohr * Copyright 1998 Uwe Bonnes * Copyright 1998, 1999 Ove Kaaven * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #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 "file.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(int21); void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context ) { const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle( DosFileHandleToWin32Handle(BX_reg(context)) ); if (dev && !strcasecmp( dev->name, "EMMXXXX0" )) { EMS_Ioctl_Handler(context); return; } 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; default: DOS3Call( context ); } } /*********************************************************************** * 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 */ { BIOSDATA *data = DOSMEM_BiosData(); if(data->FirstKbdCharPtr == data->NextKbdCharPtr) AL_reg(context) = 0; else AL_reg(context) = 0xff; } 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 */ DOSVM_Int21Handler_Ioctl( context ); 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 ); } }