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> Backup Battery Or Capacitor
richie
post Jul 20 2005, 10:37 AM
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Hi

Does anyone know how the Cx00 series holds the date and time between shutdown's or battery changes? I know the SL5500 used a ni-cad with limited charge/discharges cycles, 100 cycles only if I remember rightly and I'm interested to know if the Cx00 relies on a ni-cad or super cap.

thanks
Rich
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craigtyson
post Jul 20 2005, 12:30 PM
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They dont have anything other than the main battery + flash memory. While its possable to shutdown a 5500, swap the battery and power on without rebooting or losing any open files, with the C series this is not possable.
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richie
post Jul 21 2005, 12:01 AM
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QUOTE(craigtyson @ Jul 20 2005, 08:30 PM)
They dont have anything other than the main battery + flash memory.  While its possable to shutdown a 5500, swap the battery and power on without rebooting or losing any open files, with the C series this is not possable.
*


There is nothing to even hold the time and date?

cheers
Rich
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mikew
post Jul 21 2005, 12:24 AM
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It appears to remember the date/time that you pulled the battery, looks as if it adds a couple of minutes to this & offers this as the default as part of the boot up process.

Mike
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Bundabrg
post Jul 25 2005, 09:13 PM
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QUOTE(richie @ Jul 21 2005, 08:01 AM)
QUOTE(craigtyson @ Jul 20 2005, 08:30 PM)
They dont have anything other than the main battery + flash memory.  While its possable to shutdown a 5500, swap the battery and power on without rebooting or losing any open files, with the C series this is not possable.
*


There is nothing to even hold the time and date?

cheers
Rich
*



Somehow it holds the time somewhere. It does this through the use of 'sltime'. You call 'sltime-set' to set the time, and 'sltime' to retrieve the time.
I've got it set to call 'sltime -set' on suspend, shutdown, and 'sltime' in one of the startup scripts. As my Z hardly crashes, and when it doesn I quickly restart, I don't tend to lose time.

Still, it would be nice if it had a hardware RTC.

- Bundabrg
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