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SCSI PACKETS
7-46
7
Space (Blocks, Filemarks, End of Recorded Media)
Packet
The Space command ($11) is used to position the tape. There are four modes:
$04 xxxxxxxx xxxxxxxx Returned maximum
block length (MSW)
$06 xxxxxxxx xxxxxxxx Returned maximum
block length (LSW)
$08 xxxxxxxx xxxxxxxx Returned minimum
block length
$0A 00000000 00000000 Reserved
$0C 00000000 00000000 Reserved
$0E 00000000 00000000 Reserved
$10 00000000 00000000 Reserved
$12 00000000 00000000 Reserved
$14 00000000 Reserved
$15 00110100 SCSI function ($34 =
read block limits)
$16 000000xx Interrupt level (7
through 0) (0 = polled
mode)
$17 xxxxxxxx Vector number to use
upon return
$18 xxxxxxxx Status from SCSI
firmware (byte 2)
(Note 1)
$19 xxxxxxxx Status from SCSI
firmware (byte 3)
(Note 1)
NOTE:
1. Refer to Chapter 3.
mode $00 = Space n blocks
mode $01 = Space n filemarks