mirror of
https://github.com/reactos/reactos.git
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166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
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/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: bop.c
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* PURPOSE: BIOS Operation Handlers
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#define NDEBUG
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#include "emulator.h"
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#include "bios.h"
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#include "dos.h"
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#include "vga.h"
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#include "pic.h"
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#include "ps2.h"
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#include "timer.h"
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LPCWSTR ExceptionName[] =
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{
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L"Division By Zero",
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L"Debug",
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L"Unexpected Error",
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L"Breakpoint",
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L"Integer Overflow",
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L"Bound Range Exceeded",
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L"Invalid Opcode",
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L"FPU Not Available"
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};
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VOID WINAPI Exception(BYTE ExceptionNumber, LPWORD Stack)
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{
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WORD CodeSegment, InstructionPointer;
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ASSERT(ExceptionNumber < 8);
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/* Get the CS:IP */
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InstructionPointer = Stack[STACK_IP];
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CodeSegment = Stack[STACK_CS];
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/* Display a message to the user */
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DisplayMessage(L"Exception: %s occured at %04X:%04X",
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ExceptionName[ExceptionNumber],
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CodeSegment,
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InstructionPointer);
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/* Stop the VDM */
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VdmRunning = FALSE;
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return;
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}
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// VOID WINAPI IrqDispatch(BYTE IrqNumber, LPWORD Stack)
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// {
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// /* Check if this was an PIC IRQ */
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// if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
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// {
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// /* It was an IRQ from the master PIC */
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// BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
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// }
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// else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
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// {
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// /* It was an IRQ from the slave PIC */
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// BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
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// }
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// return;
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// }
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// VOID WINAPI BiosInt(BYTE IntNumber, LPWORD Stack)
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// {
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// }
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VOID WINAPI IntDispatch(LPWORD Stack)
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{
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BYTE IntNum;
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/* Get the interrupt number */
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IntNum = LOBYTE(Stack[STACK_INT_NUM]);
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/* Check if this was an exception */
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if (IntNum < 8)
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{
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Exception(IntNum, Stack);
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return;
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}
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/* Check if this was an PIC IRQ */
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if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
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{
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/* It was an IRQ from the master PIC */
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BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
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return;
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}
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else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
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{
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/* It was an IRQ from the slave PIC */
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BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
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return;
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}
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switch (IntNum)
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{
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case BIOS_VIDEO_INTERRUPT:
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{
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/* This is the video BIOS interrupt, call the BIOS */
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BiosVideoService(Stack);
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break;
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}
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case BIOS_EQUIPMENT_INTERRUPT:
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{
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/* This is the BIOS "get equipment" command, call the BIOS */
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BiosEquipmentService(Stack);
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break;
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}
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case BIOS_KBD_INTERRUPT:
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{
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/* This is the keyboard BIOS interrupt, call the BIOS */
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BiosKeyboardService(Stack);
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break;
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}
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case BIOS_TIME_INTERRUPT:
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{
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/* This is the time BIOS interrupt, call the BIOS */
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BiosTimeService(Stack);
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break;
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}
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case BIOS_SYS_TIMER_INTERRUPT:
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{
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/* BIOS timer update */
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BiosSystemTimerInterrupt(Stack);
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break;
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}
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case 0x20:
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{
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DosInt20h(Stack);
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break;
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}
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case 0x21:
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{
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DosInt21h(Stack);
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break;
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}
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case 0x23:
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{
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DosBreakInterrupt(Stack);
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break;
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}
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default:
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{
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DPRINT1("Unhandled interrupt: 0x%02X\n", IntNum);
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break;
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}
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}
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}
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VOID WINAPI ControlBop(LPWORD Stack)
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{
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IntDispatch(Stack);
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}
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/* EOF */
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