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From: ujmurphy@KING.MCS.DREXEL.EDU (Jim Murphy)
Newsgroups: comp.sys.apple2
Subject: Re: Video Card (Wait a minute!)
Message-ID: <9106291504.AA14620@mcs.drexel.edu>
Date: 29 Jun 91 15:04:04 GMT
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Tim Meekins said this, but I'm not in the mood to quote everyone else:

( In respect to the feasibility of adding a QuickDraw II compatible video card
( to the IIGS...)

> Ah, but Apple has published the low-level entry points for QuickDraw II,
> so it is quite feasable. After all, these all need to be patched to write
> printer drivers. Since thrid parties have written printer drivers, I don't
> see why patches in an init couldn't be written for a video. The only
> problem lies in QuickDraw II's assumption of how palettes are stored and
> formed. Worse, the number of applications that assume these things.

     We do have one other major problem. Certain parts of the toolbox do not
use QuickDraw II when drawing to the screen. A perfect example is the Menu 
Manager in respect to menu caching. It blasts the images right to the screen
RAM. This is a major problem, unless it is either changed in the future by
Apple to be more friendly, or it can be successfully patched. There are most
assuredly other issues, but this is one that is foremost in my mind.


Jim Murphy                             "I know that you believe you understand
Internet:  ujmurphy@mcs.drexel.edu     what you think I said. But I am not sure
GEnie:     J.MURPHY7                   you realize that what you heard is not 
AOL:       Jim Murphy                  what I meant."