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NAME
- TD_SEEK
-
control positioning of the drive heads with 64 bit offset
FUNCTION
This command is currently provided for internal diagnostics, disk repair, and head cleaning only. Drives may or may not implement them.
TD_SEEK move the drive heads to the track specified. The io_Offset field should be set to the (byte) offset to which the seek is to occur. TD_SEEK may not verify their position until the next read. That is, they may only move the heads; they do not actually read any data. Actually, some drives may do nothing.
TD_SEEK move the drive heads to the track specified. The io_Offset field should be set to the (byte) offset to which the seek is to occur. TD_SEEK may not verify their position until the next read. That is, they may only move the heads; they do not actually read any data. Actually, some drives may do nothing.
INPUTS
- io_Device
-
preset by the call to OpenDevice()
- io_Unit
-
preset by the call to OpenDevice()
- io_Command
-
TD_SEEK
- io_Flags
-
0 or IOF_QUICK
- io_Offset
-
byte offset from the start of the disk describing where to move the head to. This shall be a multiple of the drive block size.
RESULT
- io_Error
-
0 for success, or an error code as defined in <devices/trackdisk.h>