Commodore PET User Manual page 40

CLEAR SCREEN, obtained by pressing the CLEAR SCREEN/HOME key in
shifted mode, not only homes the eursor but also elears, or blanks, the entire
display sereen.
Before CLEAR SCREEN After CLEAR SCREEN
60 QT=QT+A
7(1 NE>::T ~.::
;:::0 CLOSE1
90 Hm
1000 F'CifΠ59411.,53
HH0 T=TI
1020 IF (TI-T)<10 GOTO 1020
1030 F'OKE 59411,61
1040 CH=0
m
Cursor here Cursor homed, screen blanked
CURSOR UP/OOWN. CURSOR UP, obtained by pressing this key in shifted
mode, moves the eursor up one line within the same physieal eolumn of the
sereen. When the cursor is at the top line of the screen, CURSOR UP has no effect.
The cursor moves over characters without changing them.
Cursor up
re
t
i
i
t
t
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