Bias settings in HP b2600 workstation. (365 Views)
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Occasional Advisor
rgarg263
Posts: 9
Registered: ‎12-16-2011
Message 1 of 4 (365 Views)
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Bias settings in HP b2600 workstation.

Pl. tell is there any CMOS battery in hp b2600?

If no How the bias setting are stored in worksation?

Thanks

Rajiv Garg.

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Honored Contributor
Robert_Jewell
Posts: 1,199
Registered: ‎06-26-2001
Message 2 of 4 (353 Views)

Re: Bias settings in HP b2600 workstation.

The HP 9000 B2600 workstation does not have a BIOS per se, but rather what is called a Boot Console Handler.  This 'BCH' is the firmware interface for the system allowing changes to boot paths, boot behavior, time of day, etc, etc.

 

It should not realy be compared to what you may think of as a PC's BIOS since this is not a PC but a UNIX workstation designed to run HP-UX (versions 11.11, 11.00 and 10.20 more specifically).

 

There is a battery that protects the contents of certain variables such as boot device settings and time of day (although this may have been handled by its own RTC chip with its own battery - not certain there).

 

 

-Bob

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Occasional Advisor
rgarg263
Posts: 9
Registered: ‎12-16-2011
Message 3 of 4 (334 Views)

Re: Bias settings in HP b2600 workstation.

sir,

How real clock (battery) on b2600 effect the time while running of workstation.

Rajiv Garg.

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Honored Contributor
Robert_Jewell
Posts: 1,199
Registered: ‎06-26-2001
Message 4 of 4 (323 Views)

Re: Bias settings in HP b2600 workstation.

Well, basically the RTC chip simply keeps a consistent count by use of an oscillator.  This count is translated to a time of day used by the system firmware.  The OS reads this value from the firmware.

 

If the battery powering this chip starts to fail then the oscillator starts to oscillate at an inconsistent rate.  This effects the count translation and then the time that is reported.  Its this variance in the count cycle during a battery or RTC failure that explains why the time change can swing so wildly (from simply running slow to jumping around by many days, weeks or even years.

 

Hope that answers what you were looking for?

 

 

-Bob

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