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SCSI PACKETS
7-18
7
+$20 RAM Work Area Address (MSW)
+$22 RAM Work Area Address (LSW)
$00 00000xxx Controller logical unit
number (SCSI
address 0-7)
$01 00000xxx Device logical unit
number (0-7)
$02 xxxxxxxx Status from SCSI
firmware (byte 0)
(Note 1)
$03 xxxxxxxx Status from SCSI
firmware (byte 1)
(Note 1)
$04 00000000 Reserved
$05 xxxxxxxx Step Rate -- number
of 40 intervals per
step (a value of 0
defaults to 6 ms)
$06 00000000 Reserved
$07 xxxxxxxx Number of heads on
drive
$08 xxxxxxxx xxxxxxxx Number of cylinders
on drive
$0A xxxxxxxx xxxxxxxx Precompensation
cylinder
$0C xxxxxxxx xxxxxxxx Logical sectors per
track, physical = this
plus alternate sectors
per zone if zone =
track
$0E 00000000 00000000 Reserved
$10 xxxxxxxx xxxxxxxx SCSI drive attributes
........ .......0 FM encoding, single
density
........ .......1 MFM encoding,
double density