dlls/krnl386.exe16/int09.c

   1 /*
   2  * DOS interrupt 09h handler (IRQ1 - KEYBOARD)
   3  *
   4  * Copyright 1999 Ove Kåven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winuser.h"
  29 #include "wine/debug.h"
  30 #include "dosexe.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(int);
  33
  34 #define QUEUELEN 31
  35
  36 static struct
  37 {
  38   BYTE queuelen,queue[QUEUELEN],ascii[QUEUELEN];
  39 } kbdinfo;
  40
  41
  42 /*
  43  * Update the BIOS data segment's keyboard status flags (mem 0x40:0x17/0x18)
  44  * if modifier/special keys have been pressed.
  45  * FIXME: we merely toggle key status and don't actively set it instead,
  46  * so we might be out of sync with the real current system status of these keys.
  47  * Probably doesn't matter too much, though.
  48  */
  49 static void DOSVM_Int09UpdateKbdStatusFlags(BYTE scan, BOOL extended, BIOSDATA *data, BOOL *modifier)
  50 {
  51     BYTE realscan = scan & 0x7f; /* remove 0x80 make/break flag */
  52     BYTE bit1 = 255, bit2 = 255;
  53     INPUT_RECORD msg;
  54     DWORD res;
  55
  56     *modifier = TRUE;
  57
  58     switch (realscan)
  59     {
  60       case 0x36: /* r shift */
  61               bit1 = 0;
  62               break;
  63       case 0x2a: /* l shift */
  64               bit1 = 1;
  65               break;
  66       case 0x1d: /* l/r control */
  67               bit1 = 2;
  68               if (!extended) /* left control only */
  69                   bit2 = 0;
  70               break;
  71       case 0x37: /* SysRq inner parts */
  72               /* SysRq scan code sequence: 38, e0, 37, e0, b7, b8 */
  73               FIXME("SysRq not handled yet.\n");
  74               break;
  75       case 0x38: /* l/r menu/alt, SysRq outer parts */
  76               bit1 = 3;
  77               if (!extended) /* left alt only */
  78                   bit2 = 1;
  79               break;
  80       case 0x46: /* scroll lock */
  81               bit1 = 4;
  82               if (!extended) /* left ctrl only */
  83                   bit2 = 4;
  84               break;
  85       case 0x45: /* num lock, pause */
  86               if (extended) /* distinguish from non-extended Pause key */
  87               { /* num lock */
  88                   bit1 = 5;
  89                   bit2 = 5;
  90               }
  91               else
  92               { /* pause */
  93                   if (!(scan & 0x80)) /* "make" code */
  94                       bit2 = 3;
  95               }
  96               break;
  97       case 0x3a: /* caps lock */
  98               bit1 = 6;
  99               bit2 = 6;
 100               break;
 101       case 0x52: /* insert */
 102               bit1 = 7;
 103               bit2 = 7;
 104               *modifier = FALSE; /* insert is no modifier: thus pass to int16 */
 105               break;
 106     }
 107     /* now that we know which bits to set, update them */
 108     if (!(scan & 0x80)) /* "make" code (keypress) */
 109     {
 110         if (bit2 != 255)
 111         {
 112             if (bit2 == 3)
 113             {
 114                 data->KbdFlags2 |= 1 << bit2; /* set "Pause" flag */
 115                 TRACE("PAUSE key, sleeping !\n");
 116                 /* wait for keypress to unlock pause */
 117                 do {
 118                     Sleep(55);
 119                 } while (!(ReadConsoleInputA(GetStdHandle(STD_INPUT_HANDLE),&msg,1,&res) && (msg.EventType == KEY_EVENT)));
 120                 data->KbdFlags2 &= ~(1 << bit2); /* release "Pause" flag */
 121             }
 122             else
 123                 data->KbdFlags2 |= 1 << bit2;
 124         }
 125         if (bit1 != 255)
 126         {
 127             if (bit1 < 4) /* key "pressed" flag */
 128                 data->KbdFlags1 |= 1 << bit1;
 129             else /* key "active" flag */
 130                 data->KbdFlags1 ^= 1 << bit1;
 131         }
 132     }
 133     else /* "break" / release */
 134     {
 135         if (bit2 != 255)
 136             data->KbdFlags2 &= ~(1 << bit2);
 137         if (bit1 < 4) /* is it a key "pressed" bit ? */
 138             data->KbdFlags1 &= ~(1 << bit1);
 139     }
 140     TRACE("ext. %d, bits %d/%d, KbdFlags %02x/%02x\n", extended, bit1, bit2, data->KbdFlags1, data->KbdFlags2);
 141 }
 142
 143 /**********************************************************************
 144  *          DOSVM_Int09Handler
 145  *
 146  * Handler for int 09h.
 147  * See http://www.execpc.com/~geezer/osd/kbd/ for a very good description
 148  * of keyboard mapping modes.
 149  */
 150 void WINAPI DOSVM_Int09Handler( CONTEXT *context )
 151 {
 152   BIOSDATA *data = DOSVM_BiosData();
 153   BYTE ascii, scan = DOSVM_Int09ReadScan(&ascii);
 154   BYTE realscan = scan & 0x7f; /* remove 0x80 make/break flag */
 155   BOOL modifier = FALSE;
 156   static BOOL extended = FALSE; /* indicates start of extended key sequence */
 157   BYTE ch[2];
 158   int cnt, c2;
 159
 160   TRACE("scan=%02x, ascii=%02x[%c]\n",scan, ascii, ascii ? ascii : ' ');
 161
 162   if (scan == 0xe0) /* extended keycode */
 163       extended = TRUE;
 164
 165   /* check for keys concerning keyboard status flags */
 166   if ((realscan == 0x52 /* insert */)
 167   ||  (realscan == 0x3a /* caps lock */)
 168   ||  (realscan == 0x45 /* num lock (extended) or pause/break */)
 169   ||  (realscan == 0x46 /* scroll lock */)
 170   ||  (realscan == 0x2a /* l shift */)
 171   ||  (realscan == 0x36 /* r shift */)
 172   ||  (realscan == 0x37 /* SysRq */)
 173   ||  (realscan == 0x38 /* l/r menu/alt, SysRq */)
 174   ||  (realscan == 0x1d /* l/r control */))
 175       DOSVM_Int09UpdateKbdStatusFlags(scan, extended, data, &modifier);
 176
 177   if (scan != 0xe0)
 178       extended = FALSE; /* reset extended flag now */
 179
 180   /* only interested in "make" (press) codes, not "break" (release),
 181    * and also not in "modifier key only" (w/o ascii) notifications */
 182   if (!(scan & 0x80) && !(modifier && !ascii))
 183   {
 184     if (ascii) {
 185       /* we already have an ASCII code, no translation necessary */
 186       if (data->KbdFlags1 & 8) /* Alt key ? */
 187         ch[0] = 0; /* ASCII code needs to be 0 if Alt also pressed */
 188       else
 189         ch[0] = ascii;
 190       /* FIXME: need to handle things such as Shift-F1 etc. */
 191       cnt = 1;
 192     } else {
 193       /* translate */
 194       UINT vkey = MapVirtualKeyA(scan&0x7f, 1);
 195       BYTE keystate[256];
 196       GetKeyboardState(keystate);
 197       cnt = ToAscii(vkey, scan, keystate, (LPWORD)ch, 0);
 198     }
 199     if (cnt>0) {
 200       for (c2=0; c2<cnt; c2++)
 201         DOSVM_Int16AddChar(ch[c2], scan);
 202     } else
 203     if (cnt==0) {
 204       /* FIXME: need to handle things like shift-F-keys,
 205        * 0xE0 extended keys, etc */
 206       DOSVM_Int16AddChar(0, scan);
 207     }
 208   }
 209
 210   DOSVM_AcknowledgeIRQ( context );
 211 }
 212
 213 static void KbdRelay( CONTEXT *context, void *data )
 214 {
 215   if (kbdinfo.queuelen) {
 216     /* cleanup operation, called from DOSVM_PIC_ioport_out:
 217      * we'll remove current scancode from keyboard buffer here,
 218      * rather than in ReadScan, because some DOS apps depend on
 219      * the scancode being available for reading multiple times... */
 220     if (--kbdinfo.queuelen) {
 221       memmove(kbdinfo.queue,kbdinfo.queue+1,kbdinfo.queuelen);
 222       memmove(kbdinfo.ascii,kbdinfo.ascii+1,kbdinfo.queuelen);
 223     }
 224   }
 225 }
 226
 227 void DOSVM_Int09SendScan( BYTE scan, BYTE ascii )
 228 {
 229   if (kbdinfo.queuelen == QUEUELEN) {
 230     ERR("keyboard queue overflow\n");
 231     return;
 232   }
 233   /* add scancode to queue */
 234   kbdinfo.queue[kbdinfo.queuelen] = scan;
 235   kbdinfo.ascii[kbdinfo.queuelen++] = ascii;
 236   /* tell app to read it by triggering IRQ 1 (int 09) */
 237   DOSVM_QueueEvent(1,DOS_PRIORITY_KEYBOARD,KbdRelay,NULL);
 238 }
 239
 240 BYTE DOSVM_Int09ReadScan( BYTE*ascii )
 241 {
 242     if (ascii) *ascii = kbdinfo.ascii[0];
 243     return kbdinfo.queue[0];
 244 }