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MESSAGE
DESCRIPTION
M
N
MESSAGE
E
M
NAME
ACG
Addressed Command Group
ATN
Attention
DAB
Data Byte
DAC
Data Accepted
DAV
Data Valid
DCL
Device Clear
END
End
EOS
End Of String
GET
Group Execute Trigger
GTL
Go To Local
IDY
Identify
IFC
Interface Clear
LAG
Listen Address Group
LLO
Local Lock Out
MLA
My Listen Address
MTA
My Talk Address
MSA
My Secondary Address
NUL
Null Byte
OSA
Other Secondary Address
OTA
Other Talk Address
PCG
Primary Command Group
PPC
Parallel Poll Configure
PPE
Parallel Poll Enable
PPD
Parallel Poll Disable
PPR1
Parallel Poll Response 1
PPR2
Parallel Poll Response 2
PPR3
Parallel Poll Response 3
PPR4
Parallel Poll Response 4
PPR5
Parallel Poll Response 5
PPR6
Parallel Poll Response 6
PPR7
Parallel Poll Response 7
PPR8
Parallel Poll Response 8
PPU
Parallel Poll Unconfigure
REN
Remote Enable
RFD
Ready For Data
RQS
Request For Service
SCG
Secondary Command Group
SDC
Selected Device Clear
SPD
Serial Poll Disable
SPE
Serial Poll Enable
SRQ
Service Request
STB
Status Byte
TCT
Take Control
TAG
Talk Address Group
UCG
Universal Command Group
UNL
Unlisten
UNT
Untalk
Table 5-4. IEEE-488 Remote Message Coding
T
C
D
D
D
Y
L
I
I
I
P
A
O
O
O
E
S
8
7
6
S
M AC
0
0
U UC
M DD B8 B7 B6 B5 B4 B3 B2 B1
U HS
U HS
M UC
0
0
U ST
M DD B8 B7 B6 B5 B4 B3 B2 B1
M AC
0
0
M AC
0
0
U UC
U UC
M AD
0
1
M UC
0
0
M AD
0
1
M AD
1
0
M SE
1
1
M DD
0
0
M SE
(OSA = SCG ^ MSA-NOT)
M AD
(OTA = TAG ^ MTA-NOT)
M ----
(PCG = ACG ˇ UCG ˇ LAG ˇ TAG)
M AC
0
0
M SE
1
1
M SE
1
1
U ST
U ST
U ST
U ST
U ST
U ST
1
U ST
1
U ST 1
M UC
0
0
U UC
U HS
U ST
1
M SE
1
1
M AC
0
0
M UC
0
0
M UC
0
0
U ST
M ST B8
B6 B5 B4 B3 B2 B1
M AC
0
0
M AD
1
0
M UC
0
0
M AD
0
1
M AD
1
0
DATA
HAND-
BUS
SHAKE
D
D
D
D
D
D
N
I
A
R
I
I
I
I
O
O
O
O
O
V
F
5
4
3
2
1
D
0
1
1
0
1
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
1
B5 B4 B3 B2 B1
B5 B4 B3 B2 B1
B5 B4 B3 B2 B1
0
0
0
0
0
0
0
1
0
1
0
B4 B3 B2 B1
1
B4 B3 B2 B1
1
1
1
1
1
1
0
1
0
1
0
0
0
1
0
0
1
1
0
0
1
1
1
0
0
0
0
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
Remote Operation
Using Commands
BUS
MANAGEMENT
N
A
E
S
I
R
D
T
O
R
F
E
A
N
I
Q
C
N
C
1
1
0
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
0
1
1
1
1
1
5
5-27
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