Commodore PET User Manual page 122

Program 8, PRINTOVER 1. Have the program type over the existing display
rather than blanking the screen. Do this without scrolling.
Is the display completely satisfactory this way? If no!. how would vou im-
prove it?
Program 9, PRINTOVER Il. The task is the same as Program 4, but fix its fau Its.
Have the character print position show visually, even when printing over the
same character. Blank the last two lines before printing the messages, pausing a
few seconds after printing PHEW!; then blank the two lines again before printing
the next display character.
Program 10, ALL THE WAY. Have the display character print over the entire
1000 character positions of the screen. The HIT A KEY message will appear only
once at the beginning of the program. After that the user enters another key
"blind." No PHEW! message.
Hint: First do the program for
1=1
TO 999. Getting the
1
OOOth character will
take a little poking around.
Program 11, BOTTOM UP. Have the program print in reverse order, starting
from the lower right-hand corner and proceeding left across rows to the home
position. This is not difficult once vou have done Programs 9 and 10. Clear the
screen before ENDing to avoid typing into a cluttered display.
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