10
3.
Operation
Key map
If you take a close look at both a CoCo and AT keyboard, you will soon realize that there is a
distinct difference in the layout of non-alphabetic keys. This interface supports the PS/2’s
keyboard map. Under NitrOS-9 almost all keys are produced with one exception, ` key . If
under RSDOS and a non displayable key is pressed, the interface adapter will output the
proper scan to produce the key, but Extended Color Basic will not interpret it for proper
display. To perform a listing scroll lock feature, press the
SCROLL LOCK
,
this will generate the
@ character.
NumLock
The
NUMLOCK
key toggles the state of the corresponding keyboard LED, and changes the
behavior of the keypad keys. When the
NUMLOCK
LED is on, the keypad keys behave the same
as the keys "0"-"9" and ".". When
NUMLOCK
is off, the keypad keys behave the same as the
arrow keys and macro keys to the keypad's immediate left. The power on state of this key is
programmable. To alter the state of this parameter, it is a toggle function. If the
NUMLOCK
LED
is ON and you would like to have
NUMLOCK
LED OFF at power up, perform the following key
sequence:
1. Press P
AUSE
/B
REAK
,
now entering programming mode.
2. Press
NUMLOCK
,
to toggle function.
3. Press P
AUSE
/B
REAK
,
now exiting programming mode.
CapsLock
Pressing the
CAPSLOCK
key toggles the keyboard's caps lock state. While the keyboard's caps
lock is on, the interface will automatically press
SHIFT W
henever an alphabetic character is
typed. Note that this doesn't affect the computer's caps lock state. If the
CAPSLOCK
LED is OFF
and you would like to have
CAPSLOCK
LED ON at power up, perform the following key
sequence:
1. Press P
AUSE
/B
REAK
,
now entering programming mode.
2. Press
CAPSLOCK
,
to toggle function.
3. Press P
AUSE
/B
REAK
,
now exiting programming mode.
Macro Keys Overview
One of the best features of this interface is it's ability to use the extra keys on the PS/2
keyboard as macro keys. This interface has two different macro modes, pre-canned and
custom.
Macro Keys - Pre-Canned
In pre-canned macro mode, the function keys F3-F12 have predefined functions that can’t be
altered. Pressing the
SHIFT MACROKEY
will perform a NitrOS-9 command lookup and the
WINDOWSKEY MACROKEY
will perform a Extended Color Basic command lookup. Please refer to
Table 1 for key command correlation for the different operating systems.
