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User’s Guide 21020285 D
Chapter 7 Board-control Commands
SCSI Hard Reset (10H) Page 7 - 31
SCSI Hard
Reset (10H)
The SCSI Hard Reset command simply asserts the reset (RST) signal on the
SCSI bus. It will abort all commands being executed, even those being executed
by devices that are currently disconnected. For this reason, it should only be
used as a drastic means of recovery.
Command
Format
The Parameter Block for the SCSI Hard Reset command has this format:
Description of
Fields
Each field of the SCSI Hard Reset Parameter Block is described below:
Command Identifier
The Command Identifier field is used to identify the Status Block associated
with a Parameter Block. It must be a unique value.
Adapter ID
This field identifies the type of command being issued. This is a Board-control
command. The value in this field must be FFH.
Command Code
The command code for this Board-control command is 10H.
Address
Offset
Byte Memory Address
Offset + 0Offset + 1Offset + 2Offset + 3
00H Command Identifier
04H Reserved Adapter ID = FFH
08H Reserved
0CH Reserved
10H Command = 10H Reserved Reserved
14H Reserved
18H Reserved
Table 88: SCSI Hard Reset Parameter Block