[comp.lang.pascal] Snow

seran@VMS.HUJI.AC.IL (ERAN MEGIDO) (12/13/90)

I am using a CGA adaptor. I am creating windows using an array
which is in an absolute memory location ($b800:0000). When using
the move command (move (videomem,othermemory,4000)) the screen
'snows'. How can I get rid or avoid this disturbing syndrom?
Thanks in advance... SERAN@VMS.HUJI.AC.IL ..... Eran

raymond@ragu.berkeley.edu (Raymond Chen) (12/14/90)

Dave Tutelman wrote an excellent paper several years ago on the
topic of avoiding snow during CGA screen updates.  This paper
is available for anonymous ftp from math.princeton.edu as the
file pub/rjc/csip/flickerfree.Z.