Execute Data
Execute Data
The
EXECUTE
DATA command allows
the
Initiator
to
instruct
the
Target
to
execute special
firmware utilities, thus providing functions not available in
the
standard
command set. This
command causes
parameter
bytes, sent by
the
Initiator
to
the
data
buffer
via
a
WRITE
BUFFER
command,
to
be used by those firmware utilities.
Caution
I
Byte
00
01
02
03
04-08
09
The
EXECUTE
DATA command allows the
Initiator
to
execute code
that
may cause damaging results.
It
should only
be
performed when no
data
retention is required. Use of this command should be restricted
to
development or other highly controlled environments. Execution
of
these
firmware utilities with parameters not approved by
Hewlett-Packard may
be
deemed a violation
of
warranty.
EXECUTE
DATA
Command Descriptor Block (COB)
Bit
7
6
I
5 4
3
I
2
I
1
I
0
Opcode
=
FEH
Logical Uillt
Number
0
0
I
RST
I
0
1
EXE
0
0
I
0 0
0
I
Page
0
0
I
0 0
Jump
Entry
Reserved
Control
Byte
RST
(Restart).
This
bit
instructs the
target
to
re-execute
the
firmware utility where
it
stopped due
to
a reported error condition,
Data
In phase, etc. Note:
If
RST is set on a
firmware utility
that
doesn't
support
it,
the
command will fail with:
Status:
CHECK
CONDITION
Sense Key: ILLEGAL
REQUEST
Additional Sense Code:
ILLEGAL
FIELD IN-COB
EXE (Execute). This
bit
instructs
the
Target
to
execute the firmware utility
at
the
specified
Page and
Jump
Entry
locations. A
WRITE
BUFFER
command which includes any required
firmware utility parameters should precede
the
EXECUTE
DATA command.
Page (ROM Page). This field indicates
the
location in ROM of
the
firmware utility.
The
currently supported Page values are 06H and 07H.
If
the
specified Page value is
not
supported,
the
command will fail with:
Status:
CHECK
CONDITION
Sense Key: ILLEGAL
REQUEST
Additional Sense Code: ILLEGAL FIELD IN COB
Jump
Entry. This field indicates
the
specific firmware utility on
the
selected Page
to
execute
or re-start. The currently supported
Jump
Entry
values are 0
to
15
(0000
to
1111).
DRAFT
Vendor Unique Command Descriptions
B·9
1/18/93 09:58
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