Eight-Bit Environment; Eight-Bit Character Set Table - Texas Instruments 880 User Manual

A data byte received by the printer can be used
either to locate a character in the in-use table or to
change the contents of the table.
5.4.2 Eight-Bit Environment
Configuration codes 39, 3A,. and 38 define an
8-bit environment. Eight bits define a 256-charac-
ter table. Columns 0 and 1 and columns 8 and 9
are reserved for control characters. Columns 2
through 7 and columns 10 through 15 contain
printable characters. The area defined by columns
2 through 7 is called the GL (G-Ieftl character set.
Columns 10 through 15 define the GR (G-rightl
character set:. See Figure 5-3.
The Gothic character set is the default character
set and consists of ASCII characters, United
States version, or a national language version as
determined by configuration. Other character sets
are available as options and, when installed, can
be selected as particular character sets (GO, G1,
G2, or G3l. See Figure 5-4.
Tables 5-12,5-13, and 5-14 summarize the escape
sequences and control characters for selection of
character sets.
'---- CO LUMN S
--I.~r"---
ROWS
------I
1 . 7 6 5 4 3
2~1
8 0 0
BITS 7 0 0
BITS
4321
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 10
1011 11
1100 12
1101 13
1110 14
1111 15
6 0 0
5 0
o
I
r-- -
r-- C -
r--
0 -
r-- N -
r - - T -
r--R_
r-
0 -
,--L_
'--
-
_ S _
r--E_
r - - T -
I
I
DATA BYTE
o
0 0 0 0 0 1
o
0
1 1
o
0
o
0
1
o
0 1
o
0 1
o
0 1
1
o o
1
o o
1
o o o
2 3 4
5 6 7
8 9
10 11 12 13 14 15
I
- -
_ C _
_ 0 _
_ N _
_ T _
r - R -
GL
r-
0 _
GR
r - L -
r- s -
r-
E -
r-- -
r - T _
I
I
2222627-26
Figure 5-3. Eight-Bit Character Set Table
5-9