Radio Shack TRS-80 PC-3 Owner's Manual page 18

BUSY
P
DEF
DEGRAD
( ~~%
)
GRAD
SHIFT
E
The cursor. This symbol (the underline) tells you the location of the next character to be typed in. As you begin
typing, the cursor replaces the prompt. The cursor is also used to position the computer over certain characters when
using the INSert and DELete functions.
Program Execution Indicator. When the
PC-3
is executing a program, this indicator is lit (except when characters are
displayed). The
PC-3
will not undergo AUTO OFF while the BUSY indicator is on. BUSY disappears from the display
when execution is completed.
Printer Indicator. This indicator appears whenever you elect the print option when using the PC-3 as a calculator.
Definable Mode Indicator. This symbol lights up whenever you press the DEF key.
Angular Measurement Indicator. This indicator displays the current unit of angles for the input of trigonometric
functions. Depending on the mode in use, the display will read DEG (degrees), RAD (radians), or GRAD (gradients).
Shift Key Indicator. This indicator lights up when the
(SHIFT)
key has been depressed. Remember, the
(SHIFT)
key
must be released before depressing any other key.
Error Indicator. Whenever an error is encountered, this indicator is displayed.
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