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APPENDIX A
CHARACTERISTICS
(cont.)
4023
Users
Enter
Send
Number
Lock
Transmittable information
on
the screen
is
transmitted to
the
computer
when
on
line,
or
to auxiliary devices
when
in
local.
Everything
on
the screen
is
transmitted to the
computer
when
on
line,
or
to auxiliary
devices
when
in local.
Shifts
the
Function Pad
into
a
Numeric
Pad; thus,
those
keys
when
depressed generate
their respective
numbers
through
9,
plus a
decimal
point.
Summary
of Buffer
Operation
Characteristics
An
important
benefit of
the
4023
is
that
the contents
of the buffer
can be
sent to the
computer
as a
message.
Instead of
conversing character-by-character, the data can
be
sent
as
one complete
block.
The number
of input
errors
is
therefore
almost
eliminated because the
user
can
see
and
edit
the
entire
input before
it
is
transmitted.
If
an
error
is
detected, the buffer
can be
re
-transmitted
by
the operator
or
on
a
command
from
the
computer.
Buffer operation
not
only
reduces
the
amount
of
"on-line"
time needed, but
also
makes more
efficient
use of
the "on-line" time
that
is
used.
CPU
time
is
also
reduced
for
two
reasons;
the
editing
function
is
done
locally
and
the
input
is
in
a
block
mode,
rather
than
a
character
at
a
time.
This
makes
for
more
efficient
use of the
computing
system,
and
equates
directly
to lower cost
for
the
user.
A-2
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