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NAME
- TD_SEEK64
-
control positioning of the drive heads.
FUNCTION
These commands are currently provided for internal diagnostics, disk repair, and head cleaning only. Drives may or may not implement them.
TD_SEEK64 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_SEEK64 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_SEEK64 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_SEEK64 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
-
low 32 bits of the 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>