 Backup Battery Or Capacitor |
OESF Forums > Distros, Development, and Model Specific Forums > Model Specific Forums > Cxx0 Hardware  |
 Jul 20 2005, 10:37 AM
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#1
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Group: Members Posts: 44 Joined: 6-January 05 Member No.: 6,133  |
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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Jul 20 2005, 12:30 PM
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#2
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 Group: Members Posts: 464 Joined: 15-June 04 Member No.: 3,698 |
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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Jul 21 2005, 12:01 AM
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#3
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Group: Members Posts: 44 Joined: 6-January 05 Member No.: 6,133 |
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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Jul 21 2005, 12:24 AM
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#4
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Group: Members Posts: 193 Joined: 19-March 04 Member No.: 2,402 |
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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Jul 25 2005, 09:13 PM
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#5
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Group: Members Posts: 183 Joined: 7-September 04 Member No.: 4,501 |
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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