subsystems/ntvdm/bop.c

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            bop.c
   5  * PURPOSE:         BIOS Operation Handlers
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 /* INCLUDES *******************************************************************/
  11
  12 #define NDEBUG
  13
  14 #include "emulator.h"
  15 #include "bios.h"
  16 #include "dos.h"
  17 #include "vga.h"
  18 #include "pic.h"
  19 #include "ps2.h"
  20 #include "timer.h"
  21
  22
  23 LPCWSTR ExceptionName[] =
  24 {
  25     L"Division By Zero",
  26     L"Debug",
  27     L"Unexpected Error",
  28     L"Breakpoint",
  29     L"Integer Overflow",
  30     L"Bound Range Exceeded",
  31     L"Invalid Opcode",
  32     L"FPU Not Available"
  33 };
  34
  35 VOID WINAPI Exception(BYTE ExceptionNumber, LPWORD Stack)
  36 {
  37     WORD CodeSegment, InstructionPointer;
  38
  39     ASSERT(ExceptionNumber < 8);
  40
  41     /* Get the CS:IP */
  42     InstructionPointer = Stack[STACK_IP];
  43     CodeSegment = Stack[STACK_CS];
  44
  45     /* Display a message to the user */
  46     DisplayMessage(L"Exception: %s occured at %04X:%04X",
  47                    ExceptionName[ExceptionNumber],
  48                    CodeSegment,
  49                    InstructionPointer);
  50
  51     /* Stop the VDM */
  52     VdmRunning = FALSE;
  53     return;
  54 }
  55
  56 // VOID WINAPI IrqDispatch(BYTE IrqNumber, LPWORD Stack)
  57 // {
  58     // /* Check if this was an PIC IRQ */
  59     // if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
  60     // {
  61         // /* It was an IRQ from the master PIC */
  62         // BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
  63     // }
  64     // else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
  65     // {
  66         // /* It was an IRQ from the slave PIC */
  67         // BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
  68     // }
  69
  70     // return;
  71 // }
  72
  73 // VOID WINAPI BiosInt(BYTE IntNumber, LPWORD Stack)
  74 // {
  75 // }
  76
  77 VOID WINAPI IntDispatch(LPWORD Stack)
  78 {
  79     BYTE IntNum;
  80
  81     /* Get the interrupt number */
  82     IntNum = LOBYTE(Stack[STACK_INT_NUM]);
  83
  84     /* Check if this was an exception */
  85     if (IntNum < 8)
  86     {
  87         Exception(IntNum, Stack);
  88         return;
  89     }
  90
  91     /* Check if this was an PIC IRQ */
  92     if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
  93     {
  94         /* It was an IRQ from the master PIC */
  95         BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
  96         return;
  97     }
  98     else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
  99     {
 100         /* It was an IRQ from the slave PIC */
 101         BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
 102         return;
 103     }
 104
 105     switch (IntNum)
 106     {
 107         case BIOS_VIDEO_INTERRUPT:
 108         {
 109             /* This is the video BIOS interrupt, call the BIOS */
 110             BiosVideoService(Stack);
 111             break;
 112         }
 113         case BIOS_EQUIPMENT_INTERRUPT:
 114         {
 115             /* This is the BIOS "get equipment" command, call the BIOS */
 116             BiosEquipmentService(Stack);
 117             break;
 118         }
 119         case BIOS_KBD_INTERRUPT:
 120         {
 121             /* This is the keyboard BIOS interrupt, call the BIOS */
 122             BiosKeyboardService(Stack);
 123             break;
 124         }
 125         case BIOS_TIME_INTERRUPT:
 126         {
 127             /* This is the time BIOS interrupt, call the BIOS */
 128             BiosTimeService(Stack);
 129             break;
 130         }
 131         case BIOS_SYS_TIMER_INTERRUPT:
 132         {
 133             /* BIOS timer update */
 134             BiosSystemTimerInterrupt(Stack);
 135             break;
 136         }
 137         case 0x20:
 138         {
 139             DosInt20h(Stack);
 140             break;
 141         }
 142         case 0x21:
 143         {
 144             DosInt21h(Stack);
 145             break;
 146         }
 147         case 0x23:
 148         {
 149             DosBreakInterrupt(Stack);
 150             break;
 151         }
 152         default:
 153         {
 154             DPRINT1("Unhandled interrupt: 0x%02X\n", IntNum);
 155             break;
 156         }
 157     }
 158 }
 159
 160 VOID WINAPI ControlBop(LPWORD Stack)
 161 {
 162     IntDispatch(Stack);
 163 }
 164
 165 /* EOF */