11 Aug
2010
11 Aug
'10
5:36 p.m.
On 8/11/10 6:38 PM, dwight elvey wrote:
My problem is that I don't know if I can restore
the information in it.
The early Sparcbooks didn't have openboot.
Under SunOS, you can use the program called "eeprom" to dump out most
of the important contents. As far as restoring it, I'm not sure about
that, as I don't know what ROM-based code the very early SPARCbooks use.
One way to do it might be to read it out using an EPROM programmer.
My Data I/O supports the MK48T02, for example.
Using an old battery device from digikey is just
prolonging the
eventual death. If it isn't a current manufacture it is already part dead
when you get it.
Well yes, but it's not really all that bad. Those chips are shipped
with their clocks stopped, and you need to set a bit in them (normally
done by the OS at boot time, just in case) to "kick start" them. I
believe the datasheets even call it the "kick start bit". The battery
life is essentially the shelf life before the kick start bit is set for
the first time.
-Dave
--
Dave McGuire
Port Charlotte, FL