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I
Extend char
I
When pressed along with another key. this key allows you to generate
the rest of the full 256-bit character set from the main typewriter
section on Standard and European keyboards (see illustration).
On
a Katakana keyboard, the "Roman" and "Kat akana" keys select the
other character sets. To get Katakana characters 161 through 254 on a
medium-resolution Series 300 screen, you must load the LEX language
extension binary.
i
Ifl
0
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It;l
n n
r:::l
n n
0
r=l
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r;l
I:;:.
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r='1
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I
~,
~~~~~~~,
~L=-J~L-..J
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~GOrnOLJ
5
rn0000
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a
w
,
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0
P
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[ \
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l:J
LJ
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l - 1J
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LJ
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EJ
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~[!J~
Figure 7-3. Extended Character Set
The
I
Tab
I
key moves the cursor forward to preset tabs. Pressing
I
Shift
~
I
Tab
I moves the cursor backward to preset tabs.
Before
I
Tab
I
can be used, a tab must be set. Tabs are set and cleared wit h
System menu softkeys. The
I
Tab
I
key is demonstrated along with the
Set Tab/Clr Tab
soft key under "System Softkeys" later in this chapter.
The
I
CTRL
I
(control) key works like
I
Shift
I
to access a set of standard
control characters, such as line-feed and form-feed. These characters
are useful to the programmer for controlling some devices and for
communicating with other computers. You probably won't need them
when running programs. The available control characters are listed in
the BASIC Language Reference in the "Useful Tables" appendix.
The
I
Select
I
key beeps but performs no function unless it is program-
defined.
7-4
TTF Kf'yhoards
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