HP Vectra Technical Reference Manual page 363

40:019H
01 S40---.ALT_INPUT---.ACCUM Accumulator for alt/numpad entry
40:01AH
02 S40__KBD__BUF_HEAD
Keyboard buffer head pointer
40:01CH
02
S40__KBD__BUF_TAIL
Keyboard buffer tail pointer
40:01EH
20
S40__KBD_BUFFER
Keyboard buffer, room for 15
entries
+
overrun
Table B.4
Keyboard State Mask Byte1 (40:17H)
Bit Data Definition
07H
0 Insert state inactive
1
Insert state active
06H
0
Caps lock state inactive
1
Caps lock state active
OSH
0
Num lock state inactive
1
Num lock state active
04H
0
Scroll lock state inactive
1
Scroll lock state active
03H
0
<
Alt > key not depressed (inactive)
1
<
Alt > key depressed (active)
02H
0
<
CTRL> key not depressed (inactive)
1
<
CTRL > key depressed (active)
01H
0
Left
<
Shift> key not depressed (inactive)
1
Left
<
Shift> key depressed (active)
DOH
0
Right
<
Shift> key not depressed (inactive)
1
Right
<
Shift> key depressed (active)
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