Keithley 6487, Reference Manual

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D-8 IEEE-488 Bus Overview Model 6487 Reference Manual
Table D-2
Command codes
D
7
D
6
D
5
D
4
X 0 0 0
Co mmand
X 0 0 1
Comm and
X 0 1 0
Pri mar y
Addr ess
X 0 1 1
Pri mar y
Addr ess
X 1 0 0
Pri mar y
Addr ess
X 1 0 1
Pri mar y
Addr ess
X 1 1 0
X 1 1 1
Bi
ts
D
3
⎠
D
2 ⎠
D
1
⎠
D
0 ⎠
Co
lu
m
n
♦
Row
⎠
0
(A
)
0
(B
)
1
(A
)
1
(
B
)
2
(A
)
2
(B
)
3
(
A
)
3
(B
)
4
(
A
)
4
(B
)
5
(A
)
5
(B
)
6
(
A
)
6
(
B) 7 (
A
)
7
(
B
)
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15
NUL SO
H
ST
X
ET
X
EO
T
EN
Q
AC
K
BE
L
BS
HT
LF
VT
FF
CR SO
SI
GT
L
SDC
PPC
*
GET
TC
T*
DLE
DC
1
DC
2
DC
3
DC
4
NA
K
SY
N
ETB
CA
N
EM
SU
B
ESC
FS
GS
RS
US
LLO
DC
L
PP
U
*
SPE
SPD
SP
! “
# $
% &
‘ ( )
• +
,
-
. /
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15
0 1 2 3 4 5 6 7 8 9
: ;
< = >
?
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
UNL
@
A B C
D
E F
G H
I J
K
L
M N O
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15
P
Q
R
S T
U V
W
X Y Z
[
\
]
∞
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
UN
T
a b c d e
f
g h
i j
k
l
m
n o
p q
r s t
u v
w
x y z
{ : }
≅
DE
L
ADDR
ESSED
CO
MMAN
D
GR
OUP
(A
C
G
)
UNI
V
E
R
SA
L
CO
M
M
AN
D
GR
OU
P
(UC
G)
LIST
EN
AD
DR
ESS
GR
O
U
P
(LA
G)
TA
LK
A
DDR
ESS
GR
OU
P
(T
A
G
)
PR
IM
A
R
Y
CO
MMAN
D
GR
OUP
(PC
G
)
SECOND
A
R
Y
CO
MMAN
D
GR
OU
P
(SD
C
)
*PPC
(P
AR
ALLE
L PO
LL CO
NFIGU
R
E)
PP
U (P
AR
ALLEL P
O
LL
UNCO
NFIG
UR
E),
and
TC
T
(T
A
K
E
C
O
NT
R
O
L) n
o
t
imp
leme
nted
b
y M
o
del
218
2.
No
te: D
0
= D
IO1
...
D
7
=
DIO
8;
X
= Do
n’
t C
ar
e.
651
4.