Re: Apple ][gs VGA Card

[herbertf@ersys.edmonton.ab.ca (Herbert Fung)]

Previously ntt@cleese.apana.org.au (Jonathan Pratt) wrote:
 
>Interlaced = the image is sent in two parts (theoretically more but I've
>not seen it implemented).  The video signal represents half the screen
>each time.  The hardware outputs the signal for alternate scan lines
>(btw a scanline = one horizontal row of pixels) all the way down the
>screen, and then the next cycle provides the ones in between which were
>skipped last time.  This makes the screen update cycle half of the
>original and can occasionally show picture abberations like flicker
>(uncommon) or aliasing.
 
How does this help display higher resolution modes?

--
Herbert Fung   herbertf@ersys.edmonton.ab.ca   
Edmonton Remote Systems   Serving Edmonton/Northern Alberta since 1982