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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!elroy.jpl.nasa.gov!sdd.hp.com!caen!uvaarpa!murdoch!murdoch.acc.virginia.edu!heyes
- From: heyes@dadev.cebaf.gov (Graham Heyes)
- Subject: 32-bit clean (was Se/30 32-bit clean?)
- Message-ID: <HEYES.92Nov23094132@dadev.cebaf.gov>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: Continuous Electron Beam Accelerator Facility
- Distribution: comp.sys.mac.hardware
- Date: Mon, 23 Nov 1992 14:41:32 GMT
- Lines: 26
-
- The "Se/30 32-bit clean" thread seems to have been going on
- at just the time that I have been investigating this problem
- myself. I have an extensively modified Mac plus in which I
- am about to install a 68030 (not a commercial accelerator, a
- board with PALs and real wires on it!). In theory this would
- give me access to virtual memory via "compact virtual" if it
- works. I had thought of modifying the memory map of the Plus
- so that I can expant the RAM area and give me some breathing
- space.
- To get above 16MB I would run into the "Dirty ROMs"
- problem. I have been told by several people that "mode32" will
- NOT work on an "accelerated" plus. The idea being that the
- patches installed by "mode32" depend on the rom version and
- are just incompatible with the Mac Plus ROMs. Fair enough.
-
- What I would like to know as a C programmer and Mac
- hardware hacker is just what is "dirty" in the ROMs? Are the
- "dirty" sections limited to the memory manager or speread all
- over?
- Connectix have a solution for the Se/30, the whole
- thing is only 27k bytes long, so what would it take to do it
- for a Plus (or anything else that needs it)?
-
- Any ideas/suggestions/comments..
-
- Graham Heyes
-