dongfeng
Veteran Member
I've put together a 486 today from various parts, as a friend of mine gave me an old mainboard and SX25 processor. As far as I know, the mainboard actually hasn't been used for at least the last 5 years.
It had an unknown bootup password set, so I did the old "clear CMOS" jumper routine, which worked. I then set the mainboard, including the date and time.
The problem is that when the computer is turned off, the time does not stay current. So if I turn the computer off at 9:30, when I turn it back on, it is still set to 9:30. I know this could be the CMOS battery, but wouldn't this reset everything else too? I don't get any CMOS Not Set errors on startup, and it does remember everything else I set.
The battery is one of those large non-removable types, but there is the option in the jumper settings to disable it and plug in your own.
Here are the mainboard settings
Any ideas? Dodgy RTC?
It had an unknown bootup password set, so I did the old "clear CMOS" jumper routine, which worked. I then set the mainboard, including the date and time.
The problem is that when the computer is turned off, the time does not stay current. So if I turn the computer off at 9:30, when I turn it back on, it is still set to 9:30. I know this could be the CMOS battery, but wouldn't this reset everything else too? I don't get any CMOS Not Set errors on startup, and it does remember everything else I set.
The battery is one of those large non-removable types, but there is the option in the jumper settings to disable it and plug in your own.
Here are the mainboard settings
Any ideas? Dodgy RTC?