You have about 63usec per line, maybe 60% useable is 38usec.  On that
     you need at least 60 pixels assuming the display is to spread across
     the entire screen, so now you have 634nsec per pixel.  Even at 20MHz
     you are only getting 3 instructions per pixel, not enough to run a
     pixel shift algorithm.  However, maybe with a external parallel to
     serial shift register or for that matter a relatively cheap VRAM....

     Rgds, Brian.


______________________________ Reply Separator _________________________________
Subject: PIC and character generator
Author:  "Paul Christenson [N3EOP]" <PJC130@PSUVM.PSU.EDU> at Internet_Exchange
Date:    11/28/95 9:38 AM


Is the PIC fast enough to be useable as a character generator to overlay
text/graphics on NTSC video?  About 10 chars/line is all I need; nothing
fancy.  (I want to overlay date/time on a camera feed.)