Contents of the CRUMBLE.DOC file
CRMBL.COM by Bob Montgomery, 5-11-87
Crumbles the screen to a pile of junk on the bottom line.
CRMBL is an alternate to CLS to clear the screen. The characters
drop one by one to the bottom line, and form a pile of junk
characters there. The crumbling action is synchronized to
vertical sync, so does not produce snow on the CGA monitor. When
a character falls, it is replaced by a space, and its attribute
(background color) is left behind. This heightens the effect on
color screens; ie, after HDIR or SD.
When you get tired of watching the crumbling action, just press
escape to return to DOS. By running the batch file CRUMBLE.BAT,
the screen crumbles until the end (or until you press escape),
and then does a real CLS. The source file, in A86 format, is
included if you're curious to see how it works. Enjoy.