2 * DOS interrupt 26h handler
14 /**********************************************************************
17 * Handler for int 26h (absolute disk read).
19 void WINAPI
INT_Int26Handler( CONTEXT
*context
)
21 BYTE
*dataptr
= CTX_SEG_OFF_TO_LIN( context
, DS_reg(context
), EBX_reg(context
) );
25 if (!DRIVE_IsValid(AL_reg(context
)))
28 AX_reg(context
) = 0x0101; /* unknown unit */
32 if (CX_reg(context
) == 0xffff)
34 begin
= *(DWORD
*)dataptr
;
35 length
= *(WORD
*)(dataptr
+ 4);
36 dataptr
= (BYTE
*)CTX_SEG_OFF_TO_LIN( context
,
37 *(WORD
*)(dataptr
+ 8), *(DWORD
*)(dataptr
+ 6) );
41 begin
= DX_reg(context
);
42 length
= CX_reg(context
);
45 TRACE(int,"int26: abs diskwrite, drive %d, sector %ld, "
46 "count %ld, buffer %d\n",
47 AL_reg(context
), begin
, length
, (int) dataptr
);
49 if ((fd
= DRIVE_OpenDevice( AL_reg(context
), O_WRONLY
)) != -1)
51 lseek( fd
, begin
* 512, SEEK_SET
);
52 /* FIXME: check errors */
53 write( fd
, dataptr
, length
* 512 );