Radio Shack TRS-80 Operation Manual page 62

Computer Graphics Operation Manual
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utilities
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Command
Action
Table 6
GCLS
Clears Graphics Screen
GCLS clears the Graphics Screen by erasing the contents of
graphics memory corresponding to the visible Graphics
Screen. GCLS erases graphics memory by writing zeroes (OFF)
to every bit in memory. GCLS does not clear the Text Screen
(video memory).
Examples
When TRSDOS Ready is displayed, type:
GCLS <ENTER>
or when the BASICG READY prompt
(»
is displayed, type:
CMD"I", "GCLS" <ENTER>
or
l~~
CMD"I","GCLS"
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