Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!mit-eddie!bloom-beacon!apple!phil
From: phil@Apple.COM (Phil Ronzone)
Newsgroups: comp.sys.mac.programmer
Subject: Re: System 7.0 Q & A -- memory protection (none)
Message-ID: <31132@apple.Apple.COM>
Date: 19 May 89 19:08:14 GMT
References: <1838@internal.Apple.COM> <7320@hoptoad.uucp> <1906@internal.Apple.COM> <7350@hoptoad.uucp> <364@taniwha.UUCP> <7357@hoptoad.uucp>
Organization: Apple Computer A/UX Group
Lines: 24

In article <7357@hoptoad.uucp> tim@hoptoad.UUCP (Tim Maroney) writes:
>In article <364@taniwha.UUCP> paul@taniwha.UUCP (Paul Campbell) writes:
>>I think that people are forgetting the 7.0 runs in 2 modes 24-bit
>>and 32-bit the above restrictions only apply to 24-bit mode.
>
>Sure, as long as you don't make any ROM calls, feel free to run in
>32-bit mode.  Seems the ROMs that are out there won't handle it, and so
>far Apple has not said that they will be providing a RAM-based OS to
>get around this.

Tim, Paul is correct. A/UX uses the exact same ROM as the Mac OS. And boy,
does it run in 32-bit mode. Stacks, heaps, the video RAM, the mapped in
address of the ROM, they are all over the place (i..e, not just in the
first 16MB of address space). I.e., even now the ROMs are dealing with
a 32-bit world.


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