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 /***********************************************************************
75 * int 21h real-mode handler. Most calls are passed directly to DOS3Call.
77 void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
79 RESET_CFLAG(context); /* Not sure if this is a good idea */
81 if(AH_reg(context) == 0x0c) /* FLUSH BUFFER AND READ STANDARD INPUT */
83 BYTE al = AL_reg(context); /* Input function to execute after flush. */
85 /* FIXME: buffers are not flushed */
88 * If AL is not one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
89 * the buffer is flushed but no input is attempted.
91 if(al != 0x01 && al != 0x06 && al != 0x07 && al != 0x08 && al != 0x0a)
97 switch(AH_reg(context))
99 case 0x00: /* TERMINATE PROGRAM */
100 TRACE("TERMINATE PROGRAM\n");
101 MZ_Exit( context, FALSE, 0 );
104 case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
105 TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
106 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
107 DOSVM_PutChar(AL_reg(context));
110 case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
111 TRACE("Write Character to Standard Output\n");
112 DOSVM_PutChar(DL_reg(context));
115 case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
116 /* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
117 if (DL_reg(context) == 0xff) {
118 static char scan = 0;
119 TRACE("Direct Console Input\n");
121 /* return pending scancode */
122 AL_reg(context) = scan;
123 RESET_ZFLAG(context);
127 if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
128 DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
129 /* return ASCII code */
130 AL_reg(context) = ascii;
131 RESET_ZFLAG(context);
132 /* return scan code on next call only if ascii==0 */
135 /* nothing pending, clear everything */
138 scan = 0; /* just in case */
142 TRACE("Direct Console Output\n");
143 DOSVM_PutChar(DL_reg(context));
147 case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
148 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
149 TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
150 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
153 case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
154 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
155 TRACE("CHARACTER INPUT WITHOUT ECHO\n");
156 DOSVM_Int16ReadChar(&AL_reg(context), NULL, FALSE);
159 case 0x0b: /* GET STDIN STATUS */
161 BIOSDATA *data = DOSMEM_BiosData();
162 if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
165 AL_reg(context) = 0xff;
169 case 0x25: /* SET INTERRUPT VECTOR */
170 DOSVM_SetRMHandler( AL_reg(context),
171 (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context)));
174 case 0x35: /* GET INTERRUPT VECTOR */
175 TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
177 FARPROC16 addr = DOSVM_GetRMHandler( AL_reg(context) );
178 context->SegEs = SELECTOROF(addr);
179 BX_reg(context) = OFFSETOF(addr);
183 case 0x40: /* WRITE TO FILE OR DEVICE */
184 /* Writes to stdout are handled here. */
185 if (BX_reg(context) == 1) {
186 BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
191 for(i=0; i<CX_reg(context); i++)
192 DOSVM_PutChar(ptr[i]);
197 case 0x44: /* IOCTL */
198 DOSVM_Int21Handler_Ioctl( context );
201 case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
202 TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
203 if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
204 AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
206 AX_reg(context) = GetLastError();
211 case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
212 TRACE("EXIT with return code %d\n",AL_reg(context));
213 MZ_Exit( context, FALSE, AL_reg(context) );
216 case 0x4d: /* GET RETURN CODE */
217 TRACE("GET RETURN CODE (ERRORLEVEL)\n");
218 AX_reg(context) = DOSVM_retval;
222 case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
223 TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
224 DOSVM_psp = BX_reg(context);
227 case 0x51: /* GET PSP ADDRESS */
228 TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
229 /* FIXME: should we return the original DOS PSP upon */
230 /* Windows startup ? */
231 BX_reg(context) = DOSVM_psp;
234 case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
235 TRACE("SYSVARS - GET LIST OF LISTS\n");
237 context->SegEs = HIWORD(DOS_LOLSeg);
238 BX_reg(context) = FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB);
242 case 0x62: /* GET PSP ADDRESS */
243 TRACE("GET CURRENT PSP ADDRESS\n");
244 /* FIXME: should we return the original DOS PSP upon */
245 /* Windows startup ? */
246 BX_reg(context) = DOSVM_psp;