Texas Instruments 990 Manual page 183

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945424-9701
APPENDIXF
JAPANESE KATAKANA KEYBOARD ARRANGEMENT,
HEXADECIMAL CODES, MODE CHARACTER POSITIONS,
MODIFIED ASCII (JIS-8), SPECIAL CHARACTER SET,
ADDITIONAL EIGHT-BIT DISPLAYED CHARACTER SET,
KEYBOARD LOGIC DIAGRAM, AND CONTACT
MATRIX INFORMATION
The standard limited-ASCII Japanese Katakana Model 911 VDT keyboard layout and symbolization
are shown in figure F-1. Figure F-2 shows
th~
same keyboard with keys numbered. Table F-1
lists the special character set hexadecimal code output by key number, key legend, and mode of
the Japanese Katakana Model 911 VDT keyboard. Figures F-3 through F-8 show keyboard mode
character positions. Table F-2 lists the Japanese Katakana modified ASCII (JIS-8) and special
character set. The additional 128 eight-bit characters included in the displayed character set are
illustrated in figure F-9. The keyboard logic diagram and contact matrix information are illustrated
in figure F-10.
(A) t 40708
Figure F-1. Japanese Katakana Model 911 VDT Keyboard Arrangement
11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
29 30 31
32 33 34
52 53 54
72
73 74
** 75 AND 86 ARE WIRED IN
PARALLEL
(B)136267C
49 50 51
69 70 71
75**" 76 77 78 79 BO 81 82 83 84 85 86**
89 90 91
ACTIVE
DUMMY - - - - - '
Figure F-2. Japanese Model 911 VDT Keyboard with Keys Numbered
F-1
Digital Systems Division