Re: Double hires mode color artifacts

[vladitx <vladitx@nucleusys.com>]

On Sep 5, 9:41 am, Dirk Thierbach <dthierb...@usenet.arcornews.de>
wrote:

> http://groups.google.com/group/comp.sys.apple2/browse_thread/thread/1...
>
> says that you can set b&w mode for double-hires by disabling 80COL when
> enabling AN3. Is that correct? Other postings in this thread heavily dispute
> it.

This should be feature of a slot7 RGB card, not of the //e on-board
video generator.

> : I think I read somewhere that RGB cards for the IIe look at the high
> : bit of each byte when displaying double Hi-Res.  The high bit tells
> : the video hardware to display as B&W or as color.  You can set this
> : bit differently for each group of 7 pixels on the screen.
>
> Is that true?

Depends on the RGB card, but definitely possible.