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Table 3-3.
The Standard ASCII Code (3 of 3)
ASCII
HP-IB DIO LINES
87654321
Octal
Decimal
Hexadecimal
HP-IB
u
XI110101
165
117
75
SC21
V
X 1 1 1 0 1 1 0
166
118
76
SC22
W
X 1 1 1 0 1 1 1
167
119
77
SC23
x
X 1 1 1 1 0 0 0
170
120
78
SC24
v
X 1 1 1 1 0 0 1
171
121
79
SC25
z
X 1 1 1 1 0 1 0
172
122
7A
SC26
1
X 1 1 1 1 0 1 1
173
123
7B
SC27
1
X1111100
174
124
7C
SC28
l
X 1 1 1 1 1 0 1
175
125
7D
SC29
X 1 1 1 1 1 1 0
176
126
7E
SC30
DEL
X 1 1 1 1 1 1 1
177
127
7F
SC31
ASCII Abbreviations
s' • 1 :
th
NUL
null
VT
vertical tab
SYN
synchronous idle
lh
I
SOH
start of heading
FF
form feed
ETB
end transmission block
I
STX
start text
CR
carrige return
CAN
cancel
t>
ETX
end text
SO
shift out
EM
end of medium
1
EOT
end of transmission
SI
shift in
SUB
substitute
1
ENQ
enquiry
DLE
data link escape
ESC
escape
ACK
acknowledge
DC1
direct control 1
FS
form separator
BEL
bell
DC2
direct control 2
GS
group separator
;
■
BS
backspace
DC3
direct control 3
RS
record separator
HT
horizontal tab
DC4
direct control 4
US
unit separator
§
LF
line feed
NAK
negative acknowledge
DEL
delete
HP-IB Abbreviations
GTL
go to local
LLO
local lockout
LAO-30 listen address
SDC
selected device clear
DCL
device clear
UNL
unlisten
PPC
parallel poll configure
PPU
parallel poll unconfigure
TAO-30 talk address
GET
group execute trigger
SPE
serial poll enable
UNT
untaiK
TCT
take control
SPD
serial poll disable
SCO-31 secondary command
COMPUTER ACCESS OF HP-IB LINES
The I/O Programming Guide for the specific computer being used must be consulted for detailed
information about direct access to the HP-IB lines; however, the intent of the following discussion is to
introduce the fundamental procedures involved in this type of programming. After this introduction,
the programmer will know what specific information to look for in the computer s I/O Programming
Guide.
HP 8340B/41B
Operating Information
3-91
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