Commodore PET User Manual page 41

CURSOR DOWN. obtained by pressing this key in b1nshifted mode, moves
the cursor down one column. Unlike CURSOR UP, CURSOR DOWN can move the
cursor down ''jnfinitely''; if the cursor is at the bottom line of the screen and vou
press the CURSOR DOWN key, the cursor itself is not moved, but the rest of the
screen is moved, or scrolled, up one line. This has the net effect of moving the cur-
sor down one line to a blank line.
Cursor down
t
Blank lines scrolled onto screen
t
: when cursor is at bottom line :
If
VOU
rapidly press and re-press the cursor control key as fast as vou can,
the cursor moves several positions between cursor blinks; this is because cursor
movements can be processed faster than cursor blinking. But each key depression
in fact moves the cursor one position, even when this is not reflected by the cur-
sor blinking.
CURSOR LEFT/RIGHT. CURSOR LEFT. obtained by pressing this key in
shifted mode, moves the cursor left one position within the same horizontal
row. Multiple pressing of the CURSOR LEFT key rapidly moves the cursor left.
When the cursor is at the beginning of a row. pressing the CURSOR LEFT key
moves the cursor up one row and to the extreme right-hand end of this row. But
the cursor stops at the home position; pressing the CURSOR LEFT key has no
effect if the cursor is in its home position. The effect of the the CURSOR LEFT key
may be illustrated as follows:
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