HP Vectra Technical Reference Manual page 201

Table 5.23
HP-Specific Commands to the HP-8041
Keycode
Value Keycode/Command Definition
OOH-OS4H
Industry standard make scancodes. The data byte will be put into an
8041 internal scancode buffer, it will loopback the scancode buffer when
the 8041 's output port is empty.
80H-OD4H
Industry standard break scancodes. The data byte will be put into an
8041 internal scancode buffer, it will loopback the scancode buffer when
the 8041 's output port is empty.
OSSH-077H
HP enhanced keyboard make scancodes. The data byte will be put into
an 8041 internal scancode buffer, it will loopback the scancode buffer
when the 8041 's output port is empty.
ODSH-OF7H
HP enhanced keyboard break scancodes. The data byte will be put into
an 8041 internal scancode buffer, it will loopback the scancode buffer
when the 8041 's output port is empty.
078H
Reserved
079H
Reserved
07AH
Pass through the next data byte written to output port 068H. The data
byte will be put into an 8041 internal scancode buffer, it will loopback
the scancode buffer when the 8041 's output port is empty.
07BH
Set the RAM Switch to '0'.
07CH
Set the RAM Switch to '1' (Default).
07DH
CRT_OFF: Set the CRT Switch to '0'. Indicates the primary display is a
monochrome-printer adapter.
07EH
CRT_ON: Set the CRT Switch set to '1 '. Indicates the primary display
adapter is the Color/Graphics or Multimode adapter (Default).
07FH
HP Reserved
OF8H
ENABLE-AUTOPOLL: Enables the SVC Port request AUTOPOLLEVENT
to be sent to the system. This command allows the 80286 to take over
the HP-HIL polling function. The AUTOPOLLEVENT SVC request is made
approximately 60 times a second whenever this command is in effect.
OF9H
DISABLE-AUTOPOLL: Disable the AUTOPOLLEVENT SVC request.
OFAH-OFEH
Reserved
OFFH
KEYBOARD_OVERRUN: This is passed through as any normal keyboard
scancode. This command is sent from the 8041 driver to the logical
keyboard to the 8041 chip to indicate the logical keyboard's data buffer
was overrun.
192 Keyboard