HP Vectra Technical Reference Manual page 195

Table 5.18 indicates the format of the data byte written to the 8041 Controller subsequent to
the 8041 Command 20H listed in table 5.17.
Table 5.18
Command Byte Format
Bit
07H
06H
OSH
04H
03H
02H
01H
186 Keyboa
rd
Data
o
o
1
o
o
Definition
Reserved-must always be
O.
Scancode conversion mode.
The scancodes received from the keyboard are converted into
PC/XT scancodes.
Convert to AT scancodes.
Acts as a NOP.
Disable Keyboard. Data will not be sent or received by the
keyboard.
Disables the keyboard.
Restore operation.
Inhibit override.
Prevents the keyboard from being disabled via bit 4.
System Flag. The value of this bit is stored as the System Flag
Bit. This bit may be read via port 60H.
Reserved-must always be
O.
Instructs the 8041 to issue an OBF interrupt when data is in
the output buffer.
Disables this feature.