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Attach/Detach Packet (all devices)
7-21
7
Example for floppy:
be described as either
a track or a cylinder,
as specified by bit 11
of the SCSI drive
attributes (byte offset
$10).
$1F xxxxxxxx Alternate cylinders
defines the number of
alternate cylinders
per disk that are to be
reserved at the end of
the disk for
alternates.
$20 xxxxxxxx xxxxxxxx Address of 384-byte
SCSI RAM area
(MSW)
$22 xxxxxxxx xxxxxxxx Address of 384-byte
SCSI RAM area
(LSW)
This SCSI RAM work
area cannot be
deallocated or moved
except after a detach
or reset command.
The firmware uses
this
area for the SCSI CDB
and local pointers
and variables.
NOTE:
1. Refer to Chapter 3.
3½, 5¼ 3½, 5¼, 8 3½, 5¼ 3½, 5¼
Norm Density High Density PCXT PCAT
FM/MFM FM/MFM MFM MFM