HP Vectra Technical Reference Manual page 151

Table 5.3
Keyboard Flags (Address 418H)
Address Bit
00418H 07H
06H
05H
04H
03H
02H
01 H-OOH
Data Definition
<
Ins> key state
<
Ins> key is pressed
<
Caps lock> key state
<
Caps lock> key is pressed
<
Num lock> key state
<
Num lock> key is pressed
<
ScrLck > key state
<
ScrLck > key is pressed
Pause State
Indicates the
<
CTRL> -
<
Num lock> pause
state is active
<
Sys req > key state
<
Sys req > key is pressed
Reserved
Note:
Applications whjch modify these two bytes may experience "difficulty in maintaining
synchronization between the Cursor Control keypad and the Numeric keypad.
5.2.3 5TO-8105 Keyboard 15R (lNT 09H)
The keyboard interrupt service routine is responsible for retrieving scancodes from the 8041
controller, generating the associated keycodes, and placing them into the STD-BIOS keyboard
buffer. Certain keys and key combinations do not generate a standard ASCII character code. In
these cases a keycode equal to 0 indicates that an application program should examine the
scancode byte to determine the "extended" ASCII code. Table 5.4 contains the scancode to
keycode translation assignments.
142 Keyboa
rd