mirror of
https://github.com/reactos/reactos.git
synced 2024-08-01 00:58:16 +00:00
085fe5e31a
- As already done for interrupts and I/O ports, add a registering system for BOPs. - INT32: Move ControlBop to the 32-bit interrupts module where it is used only. - DOS: Add (un)documented BOP_DOS (0x50) and BOP_CMD(0x54) used respectively by NTIO.SYS/NTDOS.SYS and by COMMAND.COM. It appears that they take an extra parameter (so, skip 1 byte-instruction after the BOP instruction as we do for the Control BOP 0xFF). See "Undocumented DOS 2nd edition" by Schulman et al., page 267. svn path=/branches/ntvdm/; revision=61278
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
|
|
* COPYRIGHT: GPL - See COPYING in the top level directory
|
|
* PROJECT: ReactOS Virtual DOS Machine
|
|
* FILE: bop.c
|
|
* PURPOSE: BIOS Operation Handlers
|
|
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
|
|
* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
|
|
*/
|
|
|
|
/* INCLUDES *******************************************************************/
|
|
|
|
#define NDEBUG
|
|
|
|
#include "emulator.h"
|
|
#include "bop.h"
|
|
|
|
/* PRIVATE VARIABLES **********************************************************/
|
|
|
|
/*
|
|
* This is the list of registered BOP handlers.
|
|
*/
|
|
EMULATOR_BOP_PROC BopProc[EMULATOR_MAX_BOP_NUM] = { NULL };
|
|
|
|
/* PUBLIC FUNCTIONS ***********************************************************/
|
|
|
|
VOID WINAPI RegisterBop(BYTE BopCode, EMULATOR_BOP_PROC BopHandler)
|
|
{
|
|
BopProc[BopCode] = BopHandler;
|
|
}
|
|
|
|
VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode)
|
|
{
|
|
WORD StackSegment, StackPointer;
|
|
LPWORD Stack;
|
|
|
|
/* Get the SS:SP */
|
|
StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector;
|
|
StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord;
|
|
|
|
/* Get the stack */
|
|
Stack = (LPWORD)SEG_OFF_TO_PTR(StackSegment, StackPointer);
|
|
|
|
/* Call the BOP handler */
|
|
if (BopProc[BopCode] != NULL)
|
|
BopProc[BopCode](Stack);
|
|
else
|
|
DPRINT1("Invalid BOP code: 0x%02X\n", BopCode);
|
|
}
|
|
|
|
/* EOF */
|