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- Newsgroups: comp.sys.mac.programmer
- Path: sparky!uunet!gumby!yale!cs.yale.edu!news
- From: warren@laplace.biology.yale.edu (Warren DeLano)
- Subject: Re: Fixing Apples serial drivers. How???
- Message-ID: <1992Nov17.161910.618@cs.yale.edu>
- Sender: news@cs.yale.edu (Usenet News)
- Nntp-Posting-Host: leibniz.biology.yale.edu
- Reply-To: warren@laplace.biology.yale.edu
- Organization: Yale University, Department of Computer Science, New Haven, CT
- References: <alen.720823089@crash.cts.com>
- Date: Tue, 17 Nov 1992 16:19:10 GMT
- Lines: 44
-
- In article <alen.720823089@crash.cts.com> alen@crash.cts.com (Alen Shapiro)
- writes:
- > In <Bx4vA0.Gw2@well.sf.ca.us> oster@well.sf.ca.us (David Phillip Oster)
- writes:
- >
- > >I don;t know what the original poster was doing wrong, but Apple's serial
- > >drivers certainly do correctly implement handshaking. Anytime anyone prints
- > >on a serial imagewriter, the handshaking does its stuff. Works fine.
- >
- > My experience has been that with System 7.01, serial io will lose
- > incomming characters while appletalk is active (I've only tested
- > this with baud rates 9600 or greater...don't know the lower bound).
- >
- > I have not tried any tests with my recently installed 7.1. This does NOT
- > seem to be a buffer overflow problem, rather a "lost interrupt"/character
- > overrun problem.
- >
- > Anyone have any experience with 7.1 and serial io with appletalk talking?
- >
- I've noticed the same problem with appletalk and hardware handshaking under
- System 7 and 7.1. Although appletalk is not the exclusive cause of the
- problem, downloads tend to have many more retries if I am connected to a busy
- network. This problem only occurs for me only on downloading and not
- uploading.
-
- > From: oster@well.sf.ca.us (David Phillip Oster)
- >
- > I don;t know what the original poster was doing wrong, but Apple's serial
- > drivers certainly do correctly implement handshaking. Anytime anyone prints
- > on a serial imagewriter, the handshaking does its stuff. Works fine.
- > This would correlate with the post which said that --
- >
-
- Printing to an imagewriter involves sending large amounts of data but not
- receiving. Consequently, only transmit hardware handshaking is used during
- printing. The problems I have seem to involve only receive hardware
- handshaking.
-
- Anyone else encountered these symptoms?
-
- ========================================================
- Warren Lyford DeLano - warren@laplace.biology.yale.edu
- Box 5061, New Haven, CT 06520 AOL:Warren CIS: 72746,1363
- ========================================================
-