dlls/winedos/int1a.c

   1 /*
   2  * BIOS interrupt 1ah handler
   3  *
   4  * Copyright 1993 Erik Bos
   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 "config.h"
  22 #include "wine/debug.h"
  23 #include "dosexe.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(int);
  26
  27 #define BCD_TO_BIN(x) ((x&15) + (x>>4)*10)
  28 #define BIN_TO_BCD(x) ((x%10) + ((x/10)<<4))
  29
  30
  31 /**********************************************************************
  32  *         DOSVM_Int1aHandler
  33  *
  34  * Handler for int 1ah.
  35  */
  36 void WINAPI DOSVM_Int1aHandler( CONTEXT86 *context )
  37 {
  38     switch(AH_reg(context))
  39     {
  40     case 0x00: /* GET SYSTEM TIME */
  41         {
  42             BIOSDATA *data = DOSVM_BiosData();
  43             SET_CX( context, HIWORD(data->Ticks) );
  44             SET_DX( context, LOWORD(data->Ticks) );
  45             SET_AL( context, 0 ); /* FIXME: midnight flag is unsupported */
  46             TRACE( "GET SYSTEM TIME - ticks=%ld\n", data->Ticks );
  47         }
  48         break;
  49
  50     case 0x01: /* SET SYSTEM TIME */
  51         FIXME( "SET SYSTEM TIME - not allowed\n" );
  52         break;
  53
  54     case 0x02: /* GET REAL-TIME CLOCK TIME */
  55         TRACE( "GET REAL-TIME CLOCK TIME\n" );
  56         {
  57             SYSTEMTIME systime;
  58             GetLocalTime( &systime );
  59             SET_CH( context, BIN_TO_BCD(systime.wHour) );
  60             SET_CL( context, BIN_TO_BCD(systime.wMinute) );
  61             SET_DH( context, BIN_TO_BCD(systime.wSecond) );
  62             SET_DL( context, 0 ); /* FIXME: assume no daylight saving */
  63             RESET_CFLAG(context);
  64         }
  65         break;
  66
  67     case 0x03: /* SET REAL-TIME CLOCK TIME */
  68         FIXME( "SET REAL-TIME CLOCK TIME - not allowed\n" );
  69         break;
  70
  71     case 0x04: /* GET REAL-TIME CLOCK DATE */
  72         TRACE( "GET REAL-TIME CLOCK DATE\n" );
  73         {
  74             SYSTEMTIME systime;
  75             GetLocalTime( &systime );
  76             SET_CH( context, BIN_TO_BCD(systime.wYear / 100) );
  77             SET_CL( context, BIN_TO_BCD(systime.wYear % 100) );
  78             SET_DH( context, BIN_TO_BCD(systime.wMonth) );
  79             SET_DL( context, BIN_TO_BCD(systime.wDay) );
  80             RESET_CFLAG(context);
  81         }
  82         break;
  83
  84     case 0x05: /* SET REAL-TIME CLOCK DATE */
  85         FIXME( "SET REAL-TIME CLOCK DATE - not allowed\n" );
  86         break;
  87
  88     case 0x06: /* SET ALARM */
  89         FIXME( "SET ALARM - unimplemented\n" );
  90         break;
  91
  92     case 0x07: /* CANCEL ALARM */
  93         FIXME( "CANCEL ALARM - unimplemented\n" );
  94         break;
  95
  96     case 0x08: /* SET RTC ACTIVATED POWER ON MODE */
  97     case 0x09: /* READ RTC ALARM TIME AND STATUS */
  98     case 0x0a: /* READ SYSTEM-TIMER DAY COUNTER */
  99     case 0x0b: /* SET SYSTEM-TIMER DAY COUNTER */
 100     case 0x0c: /* SET RTC DATE/TIME ACTIVATED POWER-ON MODE */
 101     case 0x0d: /* RESET RTC DATE/TIME ACTIVATED POWER-ON MODE */
 102     case 0x0e: /* GET RTC DATE/TIME ALARM AND STATUS */
 103     case 0x0f: /* INITIALIZE REAL-TIME CLOCK */
 104         INT_BARF( context, 0x1a );
 105         break;
 106
 107     case 0xb0:
 108         if (CX_reg(context) == 0x4d52 &&
 109             DX_reg(context) == 0x4349 &&
 110             AL_reg(context) == 0x01)
 111         {
 112             /*
 113              * Microsoft Real-Time Compression Interface (MRCI).
 114              * Ignoring this call indicates MRCI is not supported.
 115              */
 116             TRACE( "Microsoft Real-Time Compression Interface - not supported\n" );
 117         }
 118         else
 119         {
 120             INT_BARF(context, 0x1a);
 121         }
 122         break;
 123
 124     default:
 125         INT_BARF( context, 0x1a );
 126     }
 127 }