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From: nebel@wam.umd.edu (Chris D. Nebel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: A neat INIT needed
Message-ID: <1990Feb4.232146.24746@wam.umd.edu>
Date: 4 Feb 90 23:21:46 GMT
References: <1651@majestix.liu.se>
Sender: usenet@wam.umd.edu (USENET Posting)
Reply-To: nebel@cscwam.umd.edu (Chris D. Nebel)
Organization: University of Maryland at College Park
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In article <1651@majestix.liu.se> andwi@majestix.liu.se (Andreas Wickberg) writes:
>Wouldn't it be neat to have an init called "SE" that makes your
>MacSuper respond like a slow SE? Imagine a 'Clock Frequency' control,
>where you set the speed between 0 and 100% of full speed.
>
>And of course, it could also reduce your 19" color screen to a 9" B/W
>so you could see how dialogs and stuff will fit. Perhaps it could also
>emulate different ROM-versions, although that's probably difficult
>without violating Apple's copyright.

Hmm... I know there is an init called Screener that makes your Mac pretend
to have a 9" screen.  The other stuff could be kinda tricky.

An idea for the 'Clock Frequency' bit, though: I seem to remember that at
least some members of the 680x0 family have a trace mode in them: after
every instruction, it executes a subroutine that you point it to.  So in
that subroutine, you could just spin your metaphorical wheels for a
bit, thus slowing everything down to SE speed.


Chris Nebel
nebel@cscwam.umd.edu