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"
35 #include "wine/unicode.h"
36 #include "wine/debug.h"
38 WINE_DEFAULT_DEBUG_CHANNEL(int21);
40 void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context )
42 static const WCHAR emmxxxx0W[] = {'E','M','M','X','X','X','X','0',0};
43 const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
44 DosFileHandleToWin32Handle(BX_reg(context)) );
46 if (dev && !strcmpiW( dev->name, emmxxxx0W )) {
47 EMS_Ioctl_Handler(context);
51 switch (AL_reg(context))
53 case 0x0b: /* SET SHARING RETRY COUNT */
54 TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
55 CX_reg(context), DX_reg(context));
62 DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
64 DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
72 /***********************************************************************
73 * DOSVM_Int21Handler (WINEDOS16.133)
75 * int 21h handler. Most calls are passed directly to DOS3Call.
77 void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
81 if (DOSVM_IsWin16()) {
86 RESET_CFLAG(context); /* Not sure if this is a good idea */
88 if(AH_reg(context) == 0x0c) /* FLUSH BUFFER AND READ STANDARD INPUT */
90 BYTE al = AL_reg(context); /* Input function to execute after flush. */
92 /* FIXME: buffers are not flushed */
95 * If AL is not one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
96 * the buffer is flushed but no input is attempted.
98 if(al != 0x01 && al != 0x06 && al != 0x07 && al != 0x08 && al != 0x0a)
101 SET_AH( context, al );
104 switch(AH_reg(context))
106 case 0x00: /* TERMINATE PROGRAM */
107 TRACE("TERMINATE PROGRAM\n");
108 MZ_Exit( context, FALSE, 0 );
111 case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
112 TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
113 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
114 SET_AL( context, ascii );
115 DOSVM_PutChar(AL_reg(context));
118 case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
119 TRACE("Write Character to Standard Output\n");
120 DOSVM_PutChar(DL_reg(context));
123 case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
124 /* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
125 if (DL_reg(context) == 0xff) {
126 static char scan = 0;
127 TRACE("Direct Console Input\n");
129 /* return pending scancode */
130 SET_AL( context, scan );
131 RESET_ZFLAG(context);
134 if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
135 DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
136 /* return ASCII code */
137 SET_AL( context, ascii );
138 RESET_ZFLAG(context);
139 /* return scan code on next call only if ascii==0 */
142 /* nothing pending, clear everything */
143 SET_AL( context, 0 );
145 scan = 0; /* just in case */
149 TRACE("Direct Console Output\n");
150 DOSVM_PutChar(DL_reg(context));
154 case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
155 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
156 TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
157 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
158 SET_AL( context, ascii );
161 case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
162 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
163 TRACE("CHARACTER INPUT WITHOUT ECHO\n");
164 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
165 SET_AL( context, ascii );
168 case 0x0b: /* GET STDIN STATUS */
170 BIOSDATA *data = BIOS_DATA;
171 if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
172 SET_AL( context, 0 );
174 SET_AL( context, 0xff );
178 case 0x25: /* SET INTERRUPT VECTOR */
179 DOSVM_SetRMHandler( AL_reg(context),
180 (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
183 case 0x35: /* GET INTERRUPT VECTOR */
184 TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
186 FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
187 context->SegEs = SELECTOROF(addr);
188 SET_BX( context, OFFSETOF(addr) );
192 case 0x40: /* WRITE TO FILE OR DEVICE */
193 /* Writes to stdout are handled here. */
194 if (BX_reg(context) == 1) {
195 BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
200 for(i=0; i<CX_reg(context); i++)
201 DOSVM_PutChar(ptr[i]);
206 case 0x44: /* IOCTL */
207 DOSVM_Int21Handler_Ioctl( context );
210 case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
211 TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
212 if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
213 AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
215 SET_AX( context, GetLastError() );
220 case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
221 TRACE("EXIT with return code %d\n",AL_reg(context));
222 MZ_Exit( context, FALSE, AL_reg(context) );
225 case 0x4d: /* GET RETURN CODE */
226 TRACE("GET RETURN CODE (ERRORLEVEL)\n");
227 SET_AX( context, DOSVM_retval );
231 case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
232 TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
233 DOSVM_psp = BX_reg(context);
236 case 0x51: /* GET PSP ADDRESS */
237 TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
238 /* FIXME: should we return the original DOS PSP upon */
239 /* Windows startup ? */
240 SET_BX( context, DOSVM_psp );
243 case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
244 TRACE("SYSVARS - GET LIST OF LISTS\n");
246 context->SegEs = HIWORD(DOS_LOLSeg);
247 SET_BX( context, FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB) );
251 case 0x62: /* GET PSP ADDRESS */
252 TRACE("GET CURRENT PSP ADDRESS\n");
253 /* FIXME: should we return the original DOS PSP upon */
254 /* Windows startup ? */
255 SET_BX( context, DOSVM_psp );