18
[ 1] Normal mode
[DDDDDDDDDD)
CillCITJCillCEJlliJITDQDQD@J~
SFT LOCK key
lamp
CURSOR KEYS
FIGURE 2.10 Locations
of
some keys
TAPE CONTROL
..,....,..
••
• A
When
the
BASIC interpreter
or
another
system program is started, keyboard operation is automat-
ically set in
the
normal mode. Alphanumeric characters and symbols are
input
in
the
normal mode.
For
example,
to
input
a
B,
press
the
[!]key
(See Figure
2.10)in
the same manner
as
on
an ordinary
typewriter. Note
that
the
letter keys normally produce capital letters.
To
enter
lower case letters, hold
down
the
[ SHIFT )key
then
press
the
letter
key
-just
the opposite
of
an ordinary typewriter.
The
reason for this
is
that
capital letters are generally easier
to
read
on
the
screen, so most people
prefer
to
write their programs in capital letters. When a key has
two
non-alphabetic symbols
on
it,
such
as
[I]
(above the 0 key. See Figure 2.10.), pressing
the
key alone enters
"8".
If
you
hold
down
the
[ SHIFT j key while pressing
[I]
,
"("
will be entered. Only
the
26
letter
keys are shifted
in
the
opposite direction from a standard typewriter. t
The
[sh
LOcK)
key locks the [ SHIFT key
so
that
it does
not
need
to
be held down. When
the
SHIFT ) key
is
locked,
the
(sFT
LOcK)
lamp (See Figure 2 .I 0) lights and pressing
the
[!]key
inputs
"b"
. Characters and symbols which can be
input
in
the
normal mode correspond
to
ASCII codes 20H
to
7EH. (See Figure 2.22, ASCII code table.)
t The
BASIC
interpreter SB-5510 and DISK
BASIC
interpreter
SB
-651 0 are provided with the CHANGE statement.
With this statement, the shift direction
of
the 26 alphabetic characters, A to Z, entered from the keyboard can be
changed.
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