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C64/128 vs Apple -- Video?



    I know the fact that Apple II is capable to display only 5x7 matrix font 
inside 7x8 matrix box on NTSC monitor that it allows to be 560x192 
resolution.  If it attempts to overcome NTSC's limitation by modifying from 
7x8 matrix to 8x8 matrix which it bring to 640x192 resolution, NTSC monitor 
might be able to display 640x192 resolution, but it will fail to sustain 
color reference as 3.58MHz.  8x8 matrix is like CGA font that it appears in 
NTSC monitor.  It will not work.
    Now, what about C64/128?  It has 40x25 lines so it looks like 640x200 
resolution.  Do C64/C128 use CGA font?  Is video circuit more complex, but 
Apple II's video circuit is little simpler?  I am curious.

Bryan Parkoff