52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
|
|
* DOS interrupt 26h handler
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include "msdos.h"
|
|
#include "miscemu.h"
|
|
#include "drive.h"
|
|
#include "debugtools.h"
|
|
|
|
DEFAULT_DEBUG_CHANNEL(int);
|
|
|
|
/**********************************************************************
|
|
* INT_Int26Handler (WPROCS.138)
|
|
*
|
|
* Handler for int 26h (absolute disk read).
|
|
*/
|
|
void WINAPI INT_Int26Handler( CONTEXT86 *context )
|
|
{
|
|
BYTE *dataptr = CTX_SEG_OFF_TO_LIN( context, context->SegDs, context->Ebx );
|
|
DWORD begin, length;
|
|
|
|
if (!DRIVE_IsValid(LOBYTE(context->Eax)))
|
|
{
|
|
SET_CFLAG(context);
|
|
AX_reg(context) = 0x0201; /* unknown unit */
|
|
return;
|
|
}
|
|
|
|
if (LOWORD(context->Ecx) == 0xffff)
|
|
{
|
|
begin = *(DWORD *)dataptr;
|
|
length = *(WORD *)(dataptr + 4);
|
|
dataptr = (BYTE *)CTX_SEG_OFF_TO_LIN( context,
|
|
*(WORD *)(dataptr + 8), *(DWORD *)(dataptr + 6) );
|
|
}
|
|
else
|
|
{
|
|
begin = LOWORD(context->Edx);
|
|
length = LOWORD(context->Ecx);
|
|
}
|
|
|
|
TRACE("int26: abs diskwrite, drive %d, sector %ld, "
|
|
"count %ld, buffer %p\n",
|
|
AL_reg(context), begin, length, dataptr );
|
|
|
|
DRIVE_RawWrite(LOBYTE(context->Eax), begin, length, dataptr, TRUE);
|
|
RESET_CFLAG(context);
|
|
}
|