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- Newsgroups: comp.sys.mac.misc
- Path: sparky!uunet!usc!cs.utexas.edu!geraldo.cc.utexas.edu!slcs.slb.com!BRYDON@128.58.42.3
- From: brydon@asl.slb.com (Harvey Brydon (918)250-4312)
- Subject: Re: Soft_PC. How compatible is it?
- Message-ID: <1992Dec17.145445.968@slcs.slb.com>
- Sender: news@slcs.slb.com (News Administrator)
- Nntp-Posting-Host: 129.87.186.2
- Reply-To: brydon@dsn.SINet.slb.com
- Organization: Schlumberger/Anadrill Sugar Land, TX
- References: <1992Dec14.002308.4927@massey.ac.nz>,<29600@castle.ed.ac.uk>
- Date: Thu, 17 Dec 92 14:54:45 GMT
- Lines: 37
-
- In article <29600@castle.ed.ac.uk>, tjc@castle.ed.ac.uk (A J Cunningham) writes:
- >T.Stewart@massey.ac.nz (T.M. Stewart) writes:
- >
- >>Soft-PC was mentioned a number of times. Although it's likely to be slow,
- >>just how compatible is it?
- >
- >100%.
- >
- >>Do any users of Soft-PC have any comments?
- >
- >OK, I'm not a user I work for Insignia. But the emulation is solid.
-
- Bzzzzt. I don't use SoftPC, but I use SoftAT, a sister product.
-
- We have encountered problems with software that does goofy copy-protection.
-
- We also have encountered a problem with software that uses the 80287. This
- was blamed (by Insignia) on a timing problem, caused by defective code in the
- PC application that makes a request of the 287, and grabs data from the result
- register before looking to see if the computation was complete yet. This
- timing problem does not occur if the pseudo-287 is disabled, but boy does it
- take a long time to run. Insignia said that this could be remedied by one of
- several things (depending on source language): (1) recompiling with a
- different compiler option, if a high level language such as fortran, pascal or
- c, (2) rewriting some of the code, if it is written in assembler. We got back
- to our application vendor and they were not interested in doing any of the
- above without big bucks since we were not running it on a 'real' PC where the
- problem does not show up.
-
- Also, realize that SoftAT only emulates a 286/287, with EGA/CGA. Seems to me
- SoftPC is an 8086 or 8088 (or something smaller than the 286). Insignia
- provides a valuable product, but it does have emulation problems, and they are
- a bit behind in the technology.
- _______________________________________________________________
- Harvey Brydon | Internet: brydon@dsn.SINet.slb.com
- Dowell Schlumberger | P.O.T.S.: (918)250-4312
- Quality must be designed into software; it cannot be patched on afterwards.
-