Display Screen; Switches; Power On Or Restart Procedures - IBM 5100 Apl Reference Manual

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DISPLAY SCREEN
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display screen (Figure 2) can display 161ines of information at a time, with
up to 64 characters in each I ine. Input (information supplied by the user) as well
as output (processed information) is displayed. The bottom two lines (lines 1 and
0) of the display contain information entered from the keyboard. The cursor
(flashing horizontal line) indicates where the next input from the keyboard will
be displayed. If the cursor is moved to a position that already contains a charac-
ter, the flashing line is replaced by the flashing character. As the 5100 processes
input, all lines of the display are moyed up so that information can be entered on
the two bottom lines again. The top lines of the display are lost as the lines are
moved off of the display screen.
SWITCHES
The switches on the 5100 console (Figure 3) are used for turning power on,
restarting the system, and controlling how information is displayed.
Power On or Restart Procedures
The following switches are used when turning power on to the system or re-
starting the system operation.
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Numbers
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15
14
13
12
11
10
9
8
7
6·
5
4
3 3+2
- 4 -
I nput from the keyboard
2 5 ... Output
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_
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Cursor (flashing horizontal line)
....... 1 - - - - - - - 6 4 character positions
- - - - - - - - - 1 . , .
Normally, to distinguish input from output, input from the key-
board is indented and output is displayed starting at the left edge
of the display screen.
Figure 2. The 5100 Display Screen
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