RE: CBM 1541 (fwd)

From: COPLIN, Nicholas. (
Date: 2000-11-20 06:01:07

> > Interesting, I always assumed telling the VIC to "blank" automatically
> > disabled all extra accesses....
> No, it only disables the character code/colour fetches.  And if I remember
> correctly, the VIC-II monitors the $d011 screen blank bit twice per frame:
> you get when opening the top/bottom borders).  This mode saves time if you
> only need to display some information (in sprites).
[COPLIN, Nicholas.]  Wow... all a lot more subtle than I first expected...
>From testing over the weekend it seems that simply using the 80column mode
on the C128 doesn't disable the VIC-II access either, you need to manually
poke the blanking codes...


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