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Subject: |
Re: IOC time 1min=90sec ?? |
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From: |
Andrew Johnson <[email protected]> |
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Date: |
Tue, 17 Jan 1995 15:34:16 GMT |
On Mon, 16 Jan 95 13:50:35 -0600 [email protected] wrote:
> Hmmmm that is 33.3333333333333333333% off the expected speed. I find
> it interesting to note that 33 is 33.33.3333333333333333333% more than
> 25. I don't fully understand your entire note. But I suspect that you
> have a 33mHz mvme167 board that has its vxWorks configured for a 25mHz
> board.
I've never heard of a milli-Herz MV167! (Sorry, couldn't resist that!)
I hadn't thought about this as being a symptom of having the wrong speed
setting, but it makes perfect sense.
> I don't exectly know how to set the value in the NVRAM to to proper
> value, but that would be the nice way to fix the problem... Otherwise
> you will have to change the hard-coded clock rate settings in sysLib.c.
> Grep for 'cpuSpeed' in sysLib.c to find the line(s) of interest. (WRS
> blew it, the value on the assignment should be #define'd.)
Simple, for a 33Mhz CPU (33 = 0x21):
->m 0xfffc00fe
fffc00fe: 0000-21ee
fffc0100: 0000-.
value = 1 = 0x1
->reboot
- Andrew
,_}\_. Andrew Johnson, Technology Division
/ \ Royal Greenwich Observatory
~~~~~~~~| ,--/;. )~~~~ Madingley Road, Cambridge, UK
., |/ (/ U Phone: +44 (0)1223 374823
.`., /_\ . . Email: [email protected]
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