Control Keys - Zenith Z-100 Reference Manual

Page 5.16
Keyboard
The control keys are identified in Figure 5.5. The ALT and CTRL keys do not
generate a code but modify the codes of the other keys.
The ESC key generates ASCII code IBH (Scan code OIIBH).
is often used by software to stop the execution of a program or, when used in
sequence with another key, as a means of entering escape codes required by
some software.
The ALT key can be used to generate any hexadecimal'code from 0 to FFH
(0 to 255 decimal). To do so, press and hold the ALT key and then enter the
decimal equivalent of the hexadecimal code you wish to generate. Then release
the ALT key. When the ALT key is released, the conversion takes place and the
hexadecimal code is generated.
F I FF
0
FA FI
FF FF
Z
Ft FF
FF FAI
D AA
Figure 5.6 identifies the special keys that are used with the numeric keypad.
The NUM LCK key is used to "lock" the keypad into the shifted position. When
so locked, the SHIFT key produces the "not shifted" codes in Table 5.4 for the
0 through the 9 and " .keys of the numeric keypad. This allows the operator
to use the keypad in a manner similar to a 10-key calculator. However, through
software, it would be possible to use the keypad for other purposes.
W E R T Y U
8 D F G H J
X C V 8 N
Figure 5.5. Control Keys
A
I >
I 0 P
K L „„„,„
' "
M
F l ,
CA I . I
~
The ESC function
7 8 9
4 6 6
"~
1 2 3