Keyboard-4 (Enhanced Keyboard Character Codes) - Tandy 1400LT Service Manual

Character Codes
-
Enhanced Keyboard
The following character codes are passed through the BIOS keyboard routine to the system or application program.
The codes are returned in AL.
u.S. Keyboard Layout
MAKE CODE BREAKCODE BASECASE UPPERCASE CTRL ALT
(Hex) (Hex) (Dee) (Dec) (Dec) (Dec)
01H
02H
03H
04H
05H
06H
07H
08H
09H
OAH
OBH
OCH
ODH
OEH BS
OFH TAB
1 O H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1 BH
1CH Enter
1DH CTRL
1 EH
1 FH
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH SHIFT
2BH
81H
82H
83H
84H
85H
86H
87H
88H
89H
8AH
8BH
8CH
8DH
8EH
8FH
90H
91H
92H
93H
94H
95H
96H
97H
98H
99H
9AH
9BH
9CH
9DH
9EH
9FH
AOH
A1H
A2H
A3H
A4H
A5H
A6H
A7H
ASH
A9H
AAH
ABH
(-1)
Note 1
Note 1
Note 1
Note 1
Note 1
Note
Note
Note
Note
Note
Note
Note
(-1)
(-1)
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
(-1)
(-1)
(-1)
(-1)
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
(-1)
(-1)
(-1)
(-1)
(-1)
Table 4-7. Keyboard-4 (Enhanced Keyboard Character Codes)
4-3
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