HP Vectra Technical Reference Manual page 167

Table 5.10
Keyboard ISR Event Record
AH
=
F_ISR (OOH)
BH
=
Keyboard State (Only if state bit set in Data Type)
Bit
07H
06H
OSH
04H
03H
02H
01H
OOH
Data
1
1
1
1
1
1
1
1
Definition
Left Unlabeled key pressed*
Right Unlabeled key pressed*
<
Num lock> state active
<
Caps lock> state active
<
CTRL > key pressed
Right
<
Shift> key pressed
Left
<
Shift> key pressed
<
Alt > key pressed
BL
=
Scancode
Bit Data Definition
07H 1 Break indicator
o
Make indicator
06H-OOH Scancode
ex
DH
DL
BP
ES:SI
Number of bytes in buffer (scancode strings only)
Data Type
Logical keyboard drivers vector address / 6
HP-HIL device n vector address
Pointer to buffer (scancode strings only)
*
These keys are located to the immediate left and right of the space bar. They are only available
on some international keyboards.
The Data Type field (DH) contains a code representing the current type of scancode contained in
the ISR Event Record. When the logical keyboard driver calls a translator service, the Data Type
will match the keypad group from which the scancode originated. After translation, the Data
~
Type for the ISR Event Record returned to the logical keyboard driver should be
T_KC_IBM_PC. See table 5.11 for a complete list of keyboard data types.
158 Keyboard