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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!news.itd.umich.edu!pha From: pha@umich.edu (Paul Anderson) Newsgroups: comp.os.386bsd.questions Subject: SIO/COM driver 16550A limitations? Date: 1 Jul 1994 17:40:15 GMT Organization: University of Michigan Lines: 25 Sender: pha@enchanter.ifs.umich.edu (Paul Anderson) Distribution: world Message-ID: <2v1kdv$qal@lastactionhero.rs.itd.umich.edu> NNTP-Posting-Host: enchanter.ifs.umich.edu I just installed FreeBSD 1.1.5R (what a phenomenal job, folks). The man pages for SIO and COM both allude to problems with cheap clone 16550A serial boards (which I have). What is the failure mode for these? When I do: "cat </dev/tty00" on a stock system, the consoles freeze (no keystrokes do anything), and it appears that the system goes dead (I don't actually know what the CPU is doing, since I have no bus analyzer). I'm just trying to get my mouse going, and can do so by board swapping, I'm just curious if I am hosed with this particular board. BTW, the device probes at boot time find and identify the serial devices correctly. There are no interrupt or register conflicts. Thanks! Paul H. Anderson -- ===================================================================== | University of Michigan Research Systems E-Mail pha@umich.edu| | 535 W. William St Phone 313-763-0576 | | Ann Arbor, MI 48103-4943 FAX 313-764-5140 | =====================================================================