Re: Graphic expansion for IIc?

[jlodoen@shell.portal.com (Jeff M Lodoen)]

Steve Leahy <Steve.Leahy@anu.edu.au> writes:

>ddkilzer@iastate.edu (David D Kilzer) wrote:

>> Aside from the 40 and 80 column text modes, the //c (and likewise the
>> enhanced //e) have low-resolution, high-resolution, and
>> double-high-resolution graphic modes.  In lo-res, each block is the size
>> of a 40-column text character.  

>Don't forget double-lo-res, which was 80 by 24 (although  I
>can't think of a single application which ever used it!).

Lo-Res and Double Lo-Res 'pixels' were half the size of text-characters.
So, 40x40 or 40x48 (no text window) and 80x40 or 80x48.

But this doesn't apply to the subject. Were there any hardware add-ons
to give the //c better than these standard graphic modes?

The slotted IIs had some options like the Videx (80 columns and more).
I remember reading about a video card with 256 levels of grey in the
mid '80s. (something VGA can't do)