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PACKET RETURN STATUS
Packet Return Status
When packets are returned to the user, they contain two status words: one
with an offset of $02 and the other with an offset of $18, as shown in the tables
below, respectively. The first table details the status codes contained in the
word at offset $02. Refer to the Interface Rules for the SCSI Firmware section in
Chapter 5 for additional information. Also, refer to the command table
returned fields.
Status word offset $02
1508 0700
Bits 12-8 (reserved)
Bit 13 (RTE FLAG) (of interest only to the
programmer)
1 = This return was not preceded by an
interrupt and is the first return since
command entry. In this case, no RTE is
required.
0 = This return was preceded by an interrupt
and is not the first return, therefore,
an RTE is required to continue proces-
sing from where an interrupt occurred.
Register A3 has a pointer to a register
save area (D0-D7, A0-A6).
Bit 14 (ADDITIONAL STATUS)
1 = External status is valid.
0 = External status is not valid.
Control Flags
Status Code (Refer to Table 3-1)