Re: Help: Softwr to Run DOS on MAC

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Article #44773

#44773

From: Oivind Toien
Date: Thu, 11 Jan 1990 14:48

29 lines
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In article <1990Jan10.014311.7148@agate.berkeley.edu>
laba-4ad@web-1c.berkeley.edu (Joseph Teo) writes:
     ..... deleted
   The best and only program so far is SoftPC which provides an excellent
   emulation on a 68020/30-based Mac   ..... deleted...
   ..The drawbacks are namely speed: on my SE/30, it produces only about 60%
   the speed of a 4.77Mhz XT clone according to PC Tools and a pathetic 30%
   according to Norton Speed Index. It only emulates the 8088 (actually the
   ...... deleted

In a test I found that the clock-tick rate (Int $1C) was only about
4.5 Hz which is about 1/4 of what is it should be on a PC (approx.
18Hz).  I also tried to reprogram the "timer chip" to test the extent
of emulation of the hardware, but the clock-tick rate could not be
changed.  The test was performed on a Mac SE30 which was temporary at
my disposal together with the Soft-PC program.

This could have serious implications on the speed of programs using the
clock-tick to time events.


Oivind


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Oivind Toien, University of Oslo, Norway        Phone 47-2-454732
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<oivindt@ulrik.uio.no>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!sunic!nuug!ulrik!oivindt
From: oivindt@ulrik.uio.no (Oivind Toien)
Newsgroups: comp.sys.mac,comp.sys.ibm.pc
Subject: Re: Help: Softwr to Run DOS on MAC
Message-ID: <OIVINDT.90Jan11154823@ulrik.uio.no>
Date: 11 Jan 90 14:48:23 GMT
References: <89360.113013REDELMAN@AUVM.BITNET>
 <1990Jan10.014311.7148@agate.berkeley.edu>
Sender: oivindt@ulrik.uio.no (Oivind Toien)
Organization: University of Oslo, Norway
Lines: 29
In-Reply-To: laba-4ad@web-1c.berkeley.edu's message of 10 Jan 90 01:43:11 GMT

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