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- Newsgroups: comp.sys.mac.programmer
- Path: sparky!uunet!darwin.sura.net!uvaarpa!murdoch!murdoch.acc.virginia.edu!heyes
- From: heyes@dadev.cebaf.gov (Graham Heyes)
- Subject: Re: Writing asynchronous SCSI driver
- Message-ID: <HEYES.92Jul21124039@dadev.cebaf.gov>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: Continuous Electron Beam Accelerator Facility
- Distribution: comp.sys.mac.programmer
- Date: Tue, 21 Jul 1992 17:40:39 GMT
- Lines: 30
-
- ephraim@think.com (Ephraim Vishniac) Writes:
-
- >It doesn't
-
- >You don't.
-
- >You don't.
-
- >The appropriate documentation firmly discourages developers
-
- I agree, I very much trust Ephraim's judgment on these matters.
-
- It's very frustrating to put a loop like this into the code which you
- know damned well is going to use up cpu time which some other application
- could be using. If the Mac OS doesn't provide support then there's
- not very much to do about it.
-
- I must admit that I wasn't thinking of writing a fully asynchronous
- driver as defined in IM etc. It sounds like any "cheap" alternative is not
- worth the anguish and effort.
-
- I wouldn't advise anyone to tweak the hardware directly as I am
- doing unless the code is for their own use or targeted at a specific
- model of Mac. In My case I have an accelerated Mac Plus with some very
- non-standard hardware modifications which make it advantagous to use my
- own driver. Adding asynchronous capability was an afterthought.
-
-
- Thanks for posting,
- Graham
-