home *** CD-ROM | disk | FTP | other *** search
- Path: fc.hp.com!tomk
- From: tomk@fc.hp.com (Tom Kennedy)
- Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Re: serial problems
- Followup-To: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Date: 20 Mar 1996 23:24:30 GMT
- Organization: Hewlett-Packard Fort Collins Site
- Message-ID: <4iq43e$3mf@fcnews.fc.hp.com>
- References: <4i8pb2$i58@news2.delphi.com> <4i9sln$3ler@rohcs1.uhc.com>
- NNTP-Posting-Host: magnum.fc.hp.com
- X-Newsreader: TIN [version 1.2 PL1.4]
-
- Michael M. Rye (1726@topcity.mn.org) wrote:
- : snewland@bix.com (snewland) wrote:
- : >I have an A2000 w/OS3.1, a 28800
- : >modem and an 040. I seem to be having some problems with my serial port.
- : >Every once in a while I'll get a Serial I/O error No 6 (hardware overrun).
- : >Does anyone know what causes this and how it might be fixed.
-
- : >Thanks in advance.
-
- : >Spencer
- : --
- : You're probably either doing too much multitasking at the time, or your
- : terminal program task priority is too low. The Amiga only has a 1 byte
- : buffer for incoming serial port communications. If your priority is too
- : low on the terminal program, the CPU won't be able to service it fast
- : enough to keep up with the incoming data. Same for the multitasking
- : issues - CPU can't keep up with the serial port interrupts.
-
- : Fixing it requires you to either increase the priority of your terminal
- : program, reduce the number of program you're running concurrently (reduce
- : multitasking load), or buy a high speed serial port card for the Amiga
- : (don't buy a PeeCee (ICK!) card obviosly).
-
- Also, make sure your VBR isn't set to 0! (Run a program like
- sysinfo that will tell you what the VBR is set to. If it is set to 0,
- then you should run one of the many VBR changing tools to move it into
- Fast RAM.) Of course, this won't work with a 68000, but since you
- have an 040, you're ok :)
-
- Tom Kennedy
-