HUNTER OPERATION
SECTION 2.4
2.4.10
2. 4. 11
2.4.12
HUNTER's keyboard is built for extended use and long life, The
keyboard will withstand assaults from water, coffee and
mechanical shock, but it can be damaged by impact with sharp
objects.
KEYIDARD RE-DEFINITION
Keyboard keys are each equated to the characters they represent
by unique numerical codes, as listed in section 9,2, ASCII
CHARACTER SET. These values are defined according to the
American Standard Code for Information Interchange (ASCII).
The ASCII definitions of each key for the keyboard are contained
in 116 consecutive RAM locations named KEYBUF. The upper shift
keys are defined in the first 56 locations, followed by the 56
lower shift keys. These memory locations form a 'map' of the
physical keyboard, On power up, the HUNTER automatically
defines these locations to a standard configuration. However,
the programmer has the option to be able to define special
keyboard arrangements.
The schematic of the keyboard, see section 9,6 KEYBOARD MEMORY
MAP, shows the value in KEYBUF for each key.
It is important to note that on powering up HUNTER, the keyboard
will revert to the standard version. The programmer should
define the special keyboard requirements at an early stage in
the program and ensure that the re-definition occurs each time
the program is run.
SPECIAL CODES
Special codes are assigned to keys whose functions are:
( 1) Control key
(2) Shift key (latched)
(3) Help key
(4) Morrentary shift key
(5) Power On/Off key
(6) Virtual screen window up key
(7) Virtual screen window down key
(8) Virtual screen window right key
(9) Virtual screen window left key
(10) Virtual screen right
(11) Virtual screen left
(12) Label key
(13) Insert key
VER. V09F PAGE 2 - 9
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