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- /* td.c - Handle all TrackDisk related tasks
- ** Copyright (C) 1997,1998 Karl J. Ots
- **
- ** This program is free software; you can redistribute it and/or modify
- ** it under the terms of the GNU General Public License as published by
- ** the Free Software Foundation; either version 2 of the License, or
- ** (at your option) any later version.
- **
- ** This program is distributed in the hope that it will be useful,
- ** but WITHOUT ANY WARRANTY; without even the implied warranty of
- ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ** GNU General Public License for more details.
- **
- ** You should have received a copy of the GNU General Public License
- ** along with this program; if not, write to the Free Software
- ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
- /*--------------------*/
- /* TrackDisk Routines */
- /*--------------------*/
-
- #include <exec/types.h>
- #include <exec/io.h>
- #include <devices/trackdisk.h>
- #include <clib/exec_protos.h>
-
- #include "td.h"
-
-
- /* Private functions */
- BYTE rwTrack (APTR Buffer, UBYTE NumTracks, UBYTE TrackNum,
- struct IOExtTD *DiskReq);
-
-
- /*
- ** Read a number of complete tracks from a specified unit.
- ** Return DoIO()'s return value.
- */
- BYTE readTrack (APTR rBuffer,
- UBYTE rNumTracks,
- UBYTE rTrackNum,
- struct IOExtTD *rDiskReq)
- {
- /* Read from track */
- rDiskReq->iotd_Req.io_Command = CMD_READ;
- return rwTrack (rBuffer, rNumTracks, rTrackNum, rDiskReq);
- }
-
-
- /*
- ** Write a number of complete tracks to a specified unit with TD_FORMAT.
- ** Return DoIO()'s return value.
- */
- BYTE writeTrack (APTR wBuffer,
- UBYTE wNumTracks,
- UBYTE wTrackNum,
- struct IOExtTD *wDiskReq)
- {
- BYTE TDError;
-
- /* First format the track */
- wDiskReq->iotd_Req.io_Command = TD_FORMAT;
- TDError = rwTrack (wBuffer, wNumTracks, wTrackNum, wDiskReq);
- if (TDError) return TDError;
-
- /* Write to the track */
- wDiskReq->iotd_Req.io_Command = CMD_WRITE;
- return rwTrack (wBuffer, wNumTracks, wTrackNum, wDiskReq);
- }
-
-
- /*
- ** Perform track-sized IO on specified unit.
- ** Return DoIO()'s return value.
- */
- BYTE rwTrack (APTR Buffer,
- UBYTE NumTracks,
- UBYTE TrackNum,
- struct IOExtTD *DiskReq)
- {
- DiskReq->iotd_Req.io_Flags = 0;
- DiskReq->iotd_Req.io_Data = Buffer;
- DiskReq->iotd_Req.io_Length = NumTracks * TRACK_SIZE;
- DiskReq->iotd_Req.io_Offset = TrackNum * TRACK_SIZE;
- DiskReq->iotd_SecLabel = NULL;
-
- return DoIO ((struct IORequest *)DiskReq);
- }
-
- /*
- ** Flush the track buffer on the specified unit.
- ** Return DoIO()'s return value.
- */
- BYTE flushTrack (struct IOExtTD *DiskReq)
- {
- DiskReq->iotd_Req.io_Command = CMD_UPDATE;
- return DoIO ((struct IORequest *)DiskReq);
- }
-