HUNTER OPERATION SECTION 2.4
In order for the operating system to detect a change of these
keys, the SPELFLG location must be cleared. Changes modifying
the special codes should only be done under software control.
NOTE: 'Enter' is not a special code: it is simply CR (Decimal
13) !
LATCHED SHIFT CODE 129 (81H)
This key should be defined in both shift halves in order to
function correctly! This function gives a •toggle' action,
changing shift with each operation.
MOMENTARY SHIFT CODE 130 (82H}
As HUNTER powers up in the lower shift, it is important for the
momentary shift code to be defined in the lower shift half of
KEYBUF. This function gives a 'conventional' shift requiring
simultaneous depression of shift and the desired key.
CONTROL CODE 132 (84H}
On detection of this key the control code for the key pressed is
derived from the code located in the upper shift half of KEYBUF,
if this key has a valid 'control' equivalent.
CONTROL CODE 133 (85H}
On detection of this key the control code for the key pressed is
derived from the code located in the lower shift half of KEYBUF,
if this key has a valid 'control' equivalent.
HELP CODE 134 (86H}
The detection of this key causes the firmware to enter the HELP
text mode, Help mode is exited by pressing the 'HELP' key
again.
ON/OFF CODE 136 (88H}
The power on/off key may be relocated to any position on the
keyboard. After HUNTER has been powered off the power key
defaults back to the top right hand position of the keyboard.
VIRTUAL SCREEN~ UP CODE 138 (BAH}
VIRTUAL SCREEN WINDOW DOWN CODE 139 (8BH}
VIRTUAL SCREEN VINIXM RIGHT CODE 140 (8CH}
VIRTUAL SCREEN WINDOW LEFT CODE 141 (8DH)
The above keys Rllow the user to view the contents of the
virtual screen. The keys are completely transparent to the user
program.
LABEL CODE 143 (8FH)
Switches the function key display line on and off. The key is
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