| /* |
| * DOS interrupt 26h handler |
| */ |
| |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include "msdos.h" |
| #include "ldt.h" |
| #include "miscemu.h" |
| #include "drive.h" |
| #include "debug.h" |
| |
| /********************************************************************** |
| * INT_Int26Handler |
| * |
| * Handler for int 26h (absolute disk read). |
| */ |
| void WINAPI INT_Int26Handler( CONTEXT *context ) |
| { |
| BYTE *dataptr = PTR_SEG_OFF_TO_LIN( DS_reg(context), BX_reg(context) ); |
| DWORD begin, length; |
| int fd; |
| |
| if (!DRIVE_IsValid(AL_reg(context))) |
| { |
| SET_CFLAG(context); |
| AX_reg(context) = 0x0101; /* unknown unit */ |
| return; |
| } |
| |
| if (CX_reg(context) == 0xffff) |
| { |
| begin = *(DWORD *)dataptr; |
| length = *(WORD *)(dataptr + 4); |
| dataptr = (BYTE *)PTR_SEG_TO_LIN( *(SEGPTR *)(dataptr + 6) ); |
| } |
| else |
| { |
| begin = DX_reg(context); |
| length = CX_reg(context); |
| } |
| |
| TRACE(int,"int26: abs diskwrite, drive %d, sector %ld, " |
| "count %ld, buffer %d\n", |
| AL_reg(context), begin, length, (int) dataptr ); |
| |
| if ((fd = DRIVE_OpenDevice( AL_reg(context), O_WRONLY )) != -1) |
| { |
| lseek( fd, begin * 512, SEEK_SET ); |
| /* FIXME: check errors */ |
| write( fd, dataptr, length * 512 ); |
| close( fd ); |
| } |
| |
| RESET_CFLAG(context); |
| } |