Texas Instruments 990 Installation And Operation

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APPENDIX A
UNITED KINGDOM MODEL 911 VDT KEYBOARD ARRANGEMENT,
HEXADECIMAL CODES, MODE CHARACTER POSITIONS, ASCII, AND
SPECIAL CHARACTER SET
The standard limited-ASCII United Kingdom Model 911 VDT keyboard layout and symbolization
are shown in figure A-I. Figure A-2 shows the same keyboard layout with the keys numbered.
Figures A-3 through A-6 show keyboard mode character positions. Table A-I lists the United
Kingdom ASCII and special character set.
(A) 140673
Figure A-I. United Kingdom Model 911 VDr Keyboard Arrangement
"
12 13
32 33 34
52 53 54
72
73 74
** 75 AND 86 ARE WIRED IN PARALLEL
ACTiVE
DUMMY
90
(8)136267 A
Figure A-2. United Kingdom Model 911 VDr Keyboard with Keys Numbered
7
8
9
4
5
B
f
2 3.
I
29
30
31
49
50 51
69
70
71
.
87
~8
.
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r
A-I
Digital Systems Division

Texas Instruments 990 Specifications

General

Brand	Texas Instruments
Model	990
Category	Desktop
Language	English