Beehive International B150 Series Operator's Manual page 24

The B150 series terminals offer Serial Asynchro
nous Transmission and Reception of data. Asyn
chronous word structure consists of a start bit,
seven data bits, a parity bit (odd, even, mark, or
space) and one or two stop bits. All of these con
figurations are internally strap selectable.
3.15 CURSOR ADDRESS
Cursor addressing allows the cursor to be positioned
by sending a four code sequence. The cursor may
be addressed from the keyboard or from the I/O
Port. The cursor is addressed by receiving the fol
lowing four-word sequences. B150/B152: ESC-F,
Line Address and Character Address; B157: ESC-Y,
Line Address and Character Address.
NOTE: Illegal addresses placing the cursor
beyond the 80th character will cause the
cursor to disappear. The cursor can be
recovered by depressing the HOME or
SHIFT/CLEAR keys.
For example, to position the cursor to line 15 and
character position 41, send the following sequence:
ESC-(0001 1011), F (0100 0110), period (0010
1110), H (0100 1000). Table 3-2 gives the char
acter and line location ASCII characters required
to address any position on the display.
3.16 BLOCK SEND DELIMITER PROM
In normal operation, the B150/B152 terminals
automatically send an STX at the beginning of
each block of data and an ETX as a message trailer
at the end of the block. The B157 sends a NULL
at the beginning of each block and a carriage
return as a message trailer. If in Format mode,
a format field delimiter (AXII HT) is sent at the
end of each unprotected field; the B157 sends
a Carriage Return-Line Feed at the end of each
unprotected field. If not in Format mode, an
end-of-line delimiter (ASCII CR followed by an
ASCII LF) is inserted in the appropriate position
in the data stream. Utilization of an optional
field programmable read-only-memory (PROM)
allows the terminal to conform to special user
requirements. With this option, the terminals
have the capability of sending either none, one,
or two ASCII codes in all four of the message
positions described above.
Table 3-2 CURSOR ADDRESS CODES
ABSOLUTE CURSOR POSiriOMNQ
Kot V
AKII
CODE
Xor V ASCII
CODE
>•
8
3t
ASCII
CODE
1
SPACE 28
;
SB V
2 1
29 <
68
w
3
H
30
67
X
4
m
31
>
68
Y
S
s 32
7
60 z
0 %
33
& 60
C
7 &
34 A 81
\
8
1
35
8
82
]
9 (
38
c
83
A
10 1
37
0
84
—
•
38
E
66
\
1
1 13
+
39
F
88
*
1
AO 0
87 b
1
14
41
H
68
c
IB
42 1
89
d
16 /
43
J
70
•
17 0
44 K
71
f
18 1
46
L 72
8
10 2
48
M
73 h
20 3
47 N
74 1
21 4
48 0
76 1
22 B
40
P
78
k
23 6
60 0
77 1
24 7
61
R
7S
fti
26
62
S
79
n
28
0
63
T 80 o
27 :
64 U
3-7