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GETTING ACQUAINTED
USING THE DIALOG BUFFER AND SCROLLING
The dialog area buffer, or simply dialog buffer, is a part of the terminal 's memory
that stores the dialog displayed in the dialog area. After the dialog buffer
fills
up
,
the first entries are forced out to make room for subsequent
entries.
You can change the size of the dialog buffer to increase or decrease the number of
lines it will store
.
Fewer lines leaves more memory for segments
(discussed in
Exercise 4) and other terminal functions
.
Reduce the size of the buffer and fill it by entering
:
DABUFFER 25
STATUS
The entire list of commands
,
with their current
settings,
scrolls upward on the
screen
.
The scrolling process is probably too
rapi
d
for you to get useful
information.
So,
when the scrolling
stops,
locate the hexagonal Joydisk
in the
upper-left corner of the keyboard
.
Then
:
Press the bottom of the Joydisk to scroll some of the previous lines of
text back into
view.
Notice that you can't scroll all the way back to the
beginning
of the list. This is
because the complete list is too long
to
fit
in
the dialog
buffer
at its current size
.
Thus, the earliest parts of the status list
are
not retained
,
and cannot be
redisplayed on the screen
.
Now,
scroll back to the last line of the
buffer:
Press the top of the Joydisk until you see the asterisk prompt.
Now,
increase
the dialog buffer size to hold more of the status
list,
and the dialog
area to display more
lines.
If you have a 4107 or 4109, specify enough buffer lines to hold the
entire list by entering:
DABUFFER 200
If you have a
4106, enter:
DABUFFER 49
(Because
a 4106 has limited
memory,
you can 't set its
dialog
buffer as large as that
of a 4107 or 4109 terminal.)
Now,
increase the number of lines displayed and fill the buffer again by
entering:
DALI NES 32
STATUS
Go ahead and use the Joydisk to scroll in both directions through the
status list.
When you have finished
,
scroll to the end of the list
so that
the asterisk prompt is
displayed.
2-6
4106/4107/4109 OPERATORS
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