Apple III Hardware: Apple III Video (2/95)

Apple III Hardware: Apple III Video (2/95)

This article describes the horizontal sync signals for the Apple ///.
The Apple III's horizontal sync consists of 8usec of sync and 4usec of color burst.  There are no porches or breezeways. There is a certain amount of 3.58 MHz during a video line due to the switching of the pixels.
 
.                 ______________
.               __|            |__||||||_
.               |                       |
.               |                       |
.|||||||||||||| |        NTSC           | ||||||||||||||||
.||||||||||||||_|                       |_||||||||||||||||
. 
.    VIDEO          H SYNC        COLOR      VIDEO
.                ________________
.               |                ||||||||
.               |                       |
.               |                       |
.|||||||||||||| |       APPLE           | ||||||||||||||||
.||||||||||||||_|                       |_||||||||||||||||


Article Change History:
14 Feb 1995 - Reviewed for technical accuracy, corrected spelling of sync.

Support Information Services 

Back