2 * DOS interrupt 21h handler
4 * Copyright 1993, 1994 Erik Bos
5 * Copyright 1996 Alexandre Julliard
6 * Copyright 1997 Andreas Mohr
7 * Copyright 1998 Uwe Bonnes
8 * Copyright 1998, 1999 Ove Kaaven
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include "wine/winbase16.h"
36 #include "wine/debug.h"
38 WINE_DEFAULT_DEBUG_CHANNEL(int21);
40 void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context )
42 const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
43 DosFileHandleToWin32Handle(BX_reg(context)) );
45 if (dev && !strcasecmp( dev->name, "EMMXXXX0" )) {
46 EMS_Ioctl_Handler(context);
50 switch (AL_reg(context))
52 case 0x0b: /* SET SHARING RETRY COUNT */
53 TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
54 CX_reg(context), DX_reg(context));
61 DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
63 DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
71 /***********************************************************************
74 * int 21h real-mode handler. Most calls are passed directly to DOS3Call.
76 void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
78 RESET_CFLAG(context); /* Not sure if this is a good idea */
80 switch(AH_reg(context))
82 case 0x00: /* TERMINATE PROGRAM */
83 TRACE("TERMINATE PROGRAM\n");
84 MZ_Exit( context, FALSE, 0 );
87 case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
88 TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
89 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
90 DOSVM_PutChar(AL_reg(context));
93 case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
94 TRACE("Write Character to Standard Output\n");
95 DOSVM_PutChar(DL_reg(context));
98 case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
99 /* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
100 if (DL_reg(context) == 0xff) {
101 static char scan = 0;
102 TRACE("Direct Console Input\n");
104 /* return pending scancode */
105 AL_reg(context) = scan;
106 RESET_ZFLAG(context);
110 if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
111 DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
112 /* return ASCII code */
113 AL_reg(context) = ascii;
114 RESET_ZFLAG(context);
115 /* return scan code on next call only if ascii==0 */
118 /* nothing pending, clear everything */
121 scan = 0; /* just in case */
125 TRACE("Direct Console Output\n");
126 DOSVM_PutChar(DL_reg(context));
130 case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
131 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
132 TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
133 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
136 case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
137 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
138 TRACE("CHARACTER INPUT WITHOUT ECHO\n");
139 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
142 case 0x0b: /* GET STDIN STATUS */
144 BIOSDATA *data = DOSMEM_BiosData();
145 if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
148 AL_reg(context) = 0xff;
152 case 0x25: /* SET INTERRUPT VECTOR */
153 DOSVM_SetRMHandler( AL_reg(context),
154 (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
157 case 0x35: /* GET INTERRUPT VECTOR */
158 TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
160 FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
161 context->SegEs = SELECTOROF(addr);
162 BX_reg(context) = OFFSETOF(addr);
166 case 0x40: /* WRITE TO FILE OR DEVICE */
167 /* Writes to stdout are handled here. */
168 if (BX_reg(context) == 1) {
169 BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
174 for(i=0; i<CX_reg(context); i++)
175 DOSVM_PutChar(ptr[i]);
180 case 0x44: /* IOCTL */
181 DOSVM_Int21Handler_Ioctl( context );
184 case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
185 TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
186 if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
187 AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
189 AX_reg(context) = GetLastError();
194 case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
195 TRACE("EXIT with return code %d\n",AL_reg(context));
196 MZ_Exit( context, FALSE, AL_reg(context) );
199 case 0x4d: /* GET RETURN CODE */
200 TRACE("GET RETURN CODE (ERRORLEVEL)\n");
201 AX_reg(context) = DOSVM_retval;
205 case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
206 TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
207 DOSVM_psp = BX_reg(context);
210 case 0x51: /* GET PSP ADDRESS */
211 TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
212 /* FIXME: should we return the original DOS PSP upon */
213 /* Windows startup ? */
214 BX_reg(context) = DOSVM_psp;
217 case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
218 TRACE("SYSVARS - GET LIST OF LISTS\n");
220 context->SegEs = HIWORD(DOS_LOLSeg);
221 BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
225 case 0x62: /* GET PSP ADDRESS */
226 TRACE("GET CURRENT PSP ADDRESS\n");
227 /* FIXME: should we return the original DOS PSP upon */
228 /* Windows startup ? */
229 BX_reg(context) = DOSVM_psp;