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PC World Komputer 1999 mARCH
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PCWK3A99.iso
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DIRECT.DAT
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1998-02-22
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Most RTCs fail the 'direct I/O' test on our Millennium Bug Toolkit.
Try our free demo from our web site www.computerexperts.co.uk/pc2000
That test shows that the RTC will roll-over to 1/1/1900 on many PCs. Some
companies claim that this does not matter, provided that the BIOS interprets
that incorrect date as 1/1/2000. They call that a 'compliant' machine.
A compliant BIOS, which, when given the incorrect date 1/1/1900 by the RTC,
'infers' that it means 1/1/2000, may be suitable in the following conditions
1) The PC should preferably be switched off on roll-over
2) The BIOS when run should set the RTC century byte to 20. (Some do not)
3) The RTC should be able to retain 20 in the century byte. (Some cannot)
4) No programs should directly interrogate the RTC for the date, only via
the BIOS.
If all of these conditions are satisfied, BIOS compliance should be good
enough. However we will be using a TSR fix as well.
Our view
you should test for the first two Our toolkit does that with other tests)
It is very difficult to know whether any programs directly interrogate
the rtc. if you are unsure the tsr is the safest option.