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/debug.h"
37 WINE_DEFAULT_DEBUG_CHANNEL(int21);
39 void WINAPI DOSVM_Int21Handler_Ioctl( CONTEXT86 *context )
41 const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
42 DosFileHandleToWin32Handle(BX_reg(context)) );
44 if (dev && !strcasecmp( dev->name, "EMMXXXX0" )) {
45 EMS_Ioctl_Handler(context);
49 switch (AL_reg(context))
51 case 0x0b: /* SET SHARING RETRY COUNT */
52 TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
53 CX_reg(context), DX_reg(context));
60 DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
62 DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
70 /***********************************************************************
73 * int 21h real-mode handler. Most calls are passed directly to DOS3Call.
75 void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
77 RESET_CFLAG(context); /* Not sure if this is a good idea */
79 if(AH_reg(context) == 0x0c) /* FLUSH BUFFER AND READ STANDARD INPUT */
81 BYTE al = AL_reg(context); /* Input function to execute after flush. */
83 /* FIXME: buffers are not flushed */
86 * If AL is not one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
87 * the buffer is flushed but no input is attempted.
89 if(al != 0x01 && al != 0x06 && al != 0x07 && al != 0x08 && al != 0x0a)
95 switch(AH_reg(context))
97 case 0x00: /* TERMINATE PROGRAM */
98 TRACE("TERMINATE PROGRAM\n");
99 MZ_Exit( context, FALSE, 0 );
102 case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
103 TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
104 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
105 DOSVM_PutChar(AL_reg(context));
108 case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
109 TRACE("Write Character to Standard Output\n");
110 DOSVM_PutChar(DL_reg(context));
113 case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
114 /* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
115 if (DL_reg(context) == 0xff) {
116 static char scan = 0;
117 TRACE("Direct Console Input\n");
119 /* return pending scancode */
120 AL_reg(context) = scan;
121 RESET_ZFLAG(context);
125 if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
126 DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
127 /* return ASCII code */
128 AL_reg(context) = ascii;
129 RESET_ZFLAG(context);
130 /* return scan code on next call only if ascii==0 */
133 /* nothing pending, clear everything */
136 scan = 0; /* just in case */
140 TRACE("Direct Console Output\n");
141 DOSVM_PutChar(DL_reg(context));
145 case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
146 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
147 TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
148 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
151 case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
152 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
153 TRACE("CHARACTER INPUT WITHOUT ECHO\n");
154 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
157 case 0x0b: /* GET STDIN STATUS */
159 BIOSDATA *data = DOSMEM_BiosData();
160 if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
163 AL_reg(context) = 0xff;
167 case 0x25: /* SET INTERRUPT VECTOR */
168 DOSVM_SetRMHandler( AL_reg(context),
169 (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
172 case 0x35: /* GET INTERRUPT VECTOR */
173 TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
175 FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
176 context->SegEs = SELECTOROF(addr);
177 BX_reg(context) = OFFSETOF(addr);
181 case 0x40: /* WRITE TO FILE OR DEVICE */
182 /* Writes to stdout are handled here. */
183 if (BX_reg(context) == 1) {
184 BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
189 for(i=0; i<CX_reg(context); i++)
190 DOSVM_PutChar(ptr[i]);
195 case 0x44: /* IOCTL */
196 DOSVM_Int21Handler_Ioctl( context );
199 case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
200 TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
201 if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
202 AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
204 AX_reg(context) = GetLastError();
209 case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
210 TRACE("EXIT with return code %d\n",AL_reg(context));
211 MZ_Exit( context, FALSE, AL_reg(context) );
214 case 0x4d: /* GET RETURN CODE */
215 TRACE("GET RETURN CODE (ERRORLEVEL)\n");
216 AX_reg(context) = DOSVM_retval;
220 case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
221 TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
222 DOSVM_psp = BX_reg(context);
225 case 0x51: /* GET PSP ADDRESS */
226 TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
227 /* FIXME: should we return the original DOS PSP upon */
228 /* Windows startup ? */
229 BX_reg(context) = DOSVM_psp;
232 case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
233 TRACE("SYSVARS - GET LIST OF LISTS\n");
235 context->SegEs = HIWORD(DOS_LOLSeg);
236 BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
240 case 0x62: /* GET PSP ADDRESS */
241 TRACE("GET CURRENT PSP ADDRESS\n");
242 /* FIXME: should we return the original DOS PSP upon */
243 /* Windows startup ? */
244 BX_reg(context) = DOSVM_psp;