Character Mode Transfers; Configuration Status Byte Contents - HP 262SA Reference Manual

Dual-system display terminal and word-processing terminal
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Data Communications
7
6
5
0
\ GID DID
i8P
':r
Bee PAD
~
BYTE 1
I
PARITY
I
1
I I
'·'I~~
PARITY~
Example: Status bytes "i@P" would be interpreted as follows'
00 = Force O's or 1's
"i"
1101000 = odd parity
01 = Even
"@"
100000o = ASCII. LRC.
<
1000 byte buffers
10 = Odd
"P"
101
0000
= no data. terminal in remote
11 = 8-bit data
6
5
4
3
0
MULTIPOINT STATUS BYTES
BYTE 2
I
PARITY
1
1
I I
I I I
@
100
0000
110
0000
CODE~
L.J
I
A
100
0001
a
110
0001
Data Source
B
100
0010
b
110
0010
0= ASCII
Address Feature
C
100
0011
110
0011
1
=
EBCDIC
o
= Data source
c
address
D
100
0100
d
110
0100
BLOCK CHECK
E
100
0101
110
0101
1 = No effect
e
0:= LRC
F
100
0110
f
110
0110
1
=
CRC-16
~
BUFFER SIZE
G
100
0111
9
110
0111
EXTENDED TEXT FEATURE
00
<
1000
H
100
1000
h
110
1000
o
=
no effect
01 = 1000 to
<
2000
I
100
1001
110
1001
1
=
Extended Feature
10 = 2000 to
<
4000
J
100
1010
110
1010
11
>
4000
K
100
1011
110
1011
L
100
1100
110
1100
M
100
1101
m
110
1101
7
6
5
4
3
2
0
N
100
1110
110
1110
I
PARITY
I
1
I
10
I
0
I
1
I
0
I
0
100
1111
0
110
1111
BYTE 3
P
101
0000
111
0000
P
WAIT TO TRANSMIT
~
I
a
101
0001
q
111
0001
1 = Terminal is ready to send
BUSY (Used with
R
101
0010
111
0010
o
=
Terminal has no data
printerWRU)
S
101
0011
111
0011
0= Not busy
T
101
0100
111
0100
1 = Busy
U
101
0101
u
111
0101
V
101
0110
111
0110
W
101
0111
w
111
0111
X
101
1000
111
1000
Y
101
1001
111
1001
Z
101
1010
111
1010
TERMINAL MODE
[
101
1011
111
1011
"-
101
1100
111
1100
Terminal WRU
PrinterWRU
J
101
1101
111
1101
101
1110
111
1110
o
= Terminal is in Local
o
= Printer is offline
101
1111
111
1111
1 = Terminal is in Remote
1
= Printer is on line
Figure 7-18. Configuration Status Byte Contents
Character Mode Transfers
Character mode transfers are not used in an HP multipoint environment. All data is trans-
ferred in block form.
7-30

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