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From: mkt059@ipl.jpl.nasa.gov (Mike Tschudi (Cartographic Applic.))
Newsgroups: comp.sys.mac.programmer
Subject: SwapMMUMode? or GetPixBaseAddr?
Message-ID: <77758@ipl.jpl.nasa.gov>
Date: 26 Nov 90 14:37:01 GMT
Organization: Jet Propulsion Laboratory, Image Processing Lab
Lines: 12

Has anyone had experience with SwapMMUMode or 32-bit QuickDraw's
GetPixBaseAddr?

I'd like to alter the values of pixels in an offscreen GWorld, but
GetPixBaseAddr says that it returns a 32-bit pointer that is the
only way to get to the offscreen GWorld's PixMap, and SwapMMUMode
crashes my Mac (IIcx using Think C 4).


Michael Tschudi
Cartographic Applications Group
Jet Propulsion Lab, Pasadena, CA