Texas Instruments 990 Manual page 162

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APPENDIX C
GERMAN MODEL 911 VDT KEYBOARD ARRANGEMENT,
HEXADECIMAL CODES, MODE CHARACTER POSITIONS,
ASCII, SPECIAL CHARACTER SET, AND MATRIX CHART
The standard limited-ASCII German Model 911 VDTkeyboard layout and symbolization are shown
in figure C-1. Figure C-2 shows the same keyboard with the keys numbered. Table C-1 lists the
special character set hexadecimal code outputs by key number, key legend, and mode of the
German Model 911 VDT keyboard. Figures C-3 through C-6 show keyboard mode character posi-
tions. Table C-2 lists the German ASCII and special character set. The keyboard matrix chart is
shown in figure C-7.
(A) t 40684
11 12 13
32 33 34
52 53 54
72 73 74
Figure C-1. German Model 911 VDT Keyboard Arrangement
10
14 15 16 17 18 19 20 21 22 23 24 25 26 27
75 **" 76 77 78 79 80 81 82 83 84 85 86**
29 30 31
49
so
51
69 70 71
.
87
.
88
** 75 AND 86 ARE WIRED IN PARALLEL
ACTIVE
90 91
(8)1362678
DUMMY - - - - - '
Figure C-2. German Model 911 VDT Keyboard with Keys Numbered
C-1
Digital Systems Division