User`s manual

SCSI Firmware Status Codes

F-4

If the SCSI Bus Status byte returned by the firmware is non-zero,

this byte is returned as the Controller-Dependent code, and the

SIOP Status byte is thrown away. If the SCSI Bus Status is zero, the

SIOP Status byte is returned.

Therefore, there is dual use of the Controller-Dependent error code

byte for error code bytes $02, $04, $08, $10, $14, and $18. For

example, if the Controller-Dependent value returned by the

debugger is $02, this code could have two possible meanings:

SCSI Bus Status: Check Condition

SIOP Status: Command aborted - SCSI bus reset

Table F-2. SCSI Firmware Status Codes

Code Description

SCSI Bus Status

$00 Good completion

$02 Check condition

$04 Condition met good

$08 Busy

$10 Intermediate good

$14 Intermediate condition met good

$18 Reservation conßict

$22 Command terminated

$28 Queue full

SIOP Status

$00 Good status

$01 No operation bits were set

$02 Cmd aborted - SCSI bus reset

$03 Cmd aborted - bus device reset message

$04 Cmd aborted - abort message

$05 Cmd aborted - abort tag message

$06 Cmd aborted - clear queue message

$07 Data overßow - Too much data

$08 Data underrun - Not enough data