Newsgroups: comp.sys.sgi
Path: utzoo!utgpu!news-server.csri.toronto.edu!ecf!xiaoyan
From: xiaoyan@ecf.toronto.edu (Yan Xiao)
Subject: Re: External clock for P-I serial port?
Message-ID: <1990Dec15.003528.11439@ecf.utoronto.ca>
Sender: news@ecf.utoronto.ca (News Administrator)
Organization: University of Toronto, Engineering Computing Facility
References: <CHRISA.90Dec13145507@beldar.ma30.bull.com>
Distribution: comp
Date: Sat, 15 Dec 90 00:35:28 GMT

In article <CHRISA.90Dec13145507@beldar.ma30.bull.com> chrisa@beldar.ma30.bull.com (Chris Anderson) writes:
>
>Is it possible to provide an external clock for either or both of the
>serial ports on the personal Iris? 
>
>The manuals indicate that ioctl can set an external clock mode,
>but the signal is undocumented. Is the clock signal a spare pin on the 
>D connector, and if so, what should drive it?
>
>Thanks for any info.
>
>---Chris A.

I am wondering why you need an external clock?  gettimeofday() provides
time in micro-second.  

xiao