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- Newsgroups: comp.unix.sysv386
- Path: sparky!uunet!spool.mu.edu!sol.ctr.columbia.edu!ira.uka.de!math.fu-berlin.de!fub!geminix.in-berlin.de!gemini
- From: gemini@geminix.in-berlin.de (Uwe Doering)
- Subject: Re: Loosing incoming serial characters [summary]
- References: <JOCHEN.92Sep5145619@busybit.mrz.sub.org> <Bu5qJq.HJo@gator.rn.com>
- Organization: Private UNIX Site
- Date: Tue, 8 Sep 1992 08:35:32 GMT
- Message-ID: <CFT637P@geminix.in-berlin.de>
- Lines: 33
-
- larry@gator.rn.com (Larry Snyder) writes:
-
- >jochen@busybit.mrz.sub.org (Jochen Fahrner) writes:
- >
- >>The PC-Design is not very good for multitasking operating system like
- >>unix or OS/2. There are at least 2 dumb periphery devices which needs
- >
- >You don't want to have dan@quantum.on.ca hearing you say that -- he
- >gets 115200 baud on 2 regular dumb ports on a 386/25 -- without any
- >noticable effects on system loading :)
-
- With FAS 2.10 under ISC UNIX 3.0 I can run two ports with NS16550A UARTs
- with 115200 bps at the same time. CPU load is only 25% (486/33 motherboard)
- and there are no lost characters at all. I use a 1542B and made this test
- with heavy disk i/o in the background.
-
- I think Jochen has a broken motherboard, and I don't think it is right
- to make the PC design responsible for the flaw in his motherboard. It
- was the motherboard manufacturer who made the error, not the people who
- designed the PC. Not that I like the PC design very much, but I also
- don't like wrong accusations.
-
- BTW, the ISA bus _is_ standardized by some committee. However, I keep
- forgetting its name. Was it IEEE? The times where every motherboard
- manufacturer designed the ISA bus interface to its taste are long over.
- If motherboards are sold today that don't conform to this standard they
- can safely be considered broken.
-
- Uwe
- --
- Uwe Doering | INET : gemini@geminix.in-berlin.de
- Berlin |----------------------------------------------------------------
- Germany | UUCP : ...!unido!fub!geminix.in-berlin.de!gemini
-