Texas Instruments 990 Manual page 148

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APPENDIX A
UNITED KINGDOM MODEL 911 VDT KEYBOARD ARRANGEMENT,
HEXADECThfAL CODES, MODE CHARACTER POSITIONS, ASCII,
SPECIAL CHARACTER SET, AND MATRIX CHART
The standard limited-ASCII United Kingdom Model 911 VDT keyboard layout and symbolization
are shown in figure A-1. Figure A-2 shows the same keyboard layout with the keys numbered.
Table A-1 lists the special character set hexadecimal code outputs by key number, key legend, and
mode of the United Kingdom Model 911 VDT keyboard. Figures A-3 through A-6 show keyboard
mode character positions. Table A-2 lists the United Kingdom ASCII and special character set. The
keyboard matrix chart is shown in figure A-7.
(A) 1 40673
Figure A-1. United Kingdom Model 911 VDT Keyboard Arrangement
3
I
I
10
11 12
13
14 15 16 17 18 19 20
21 22 23
24
25 26 27 28
29
30
31
32
33
34 35
36 37 38 39
40 41 42 44 45 46
47 48
49
so
51
52 53 54
55 57 58 59 60 61 62 64 65 66 68
69 70
71
72 73 74
75 **"
76 77 78 79 80 81 82 83 84 85 86**
~B
** 75 AND 86 ARE WIRED IN PARALLEL
90
ACTIVE
(8)136267 A
DUMMY _ _ __.
Figure A-2. United Kingdom Model 911 VDT Keyboard with Keys Numbered
A-1
Digital Systems Division