#My Clock has stopped!
7 messages in this thread
I have a problem with the real time clock on my A2000 rev 6.2B that I am
hoping someone will be able to give me some guidance on:
The clock seems to work…that is, when I boot my system the correct
time is loaded into workbench. The problem is that it is then not updated.
If I, for instance, open up the software clock in workbench, the time that
is shown is the time that I booted the system. The clock just sits there,
unmoving, displaying that time. The second hand is still.
Another example are the timers in Whap! They don't update. The 'time
on system' display is always 00:00. Quickbill always reads $1.50, no
matter how many hours I have spent online to CIS.
Another example is a little program I have called 'National Debt', which
is supposed to display the national debt, and update it every few seconds
to reflect the growing amount of deficit. It doesn't update. It just sits
there…
Well, you get the picture! Anyone care to comment? Any advice would be
appreciated.
Nick Moore
Nick,
You've lost the "tick" line into one of the 8520's…or you've lost
the 8520 itself (most likely occurance). The 8520 would be labeled U300,
I suspect you may also find you have problems with your parallel port
and/or your internal floppy.
The tick line is supplied by one of two places…by default, it
comes from the power supply, but by changing jumper J300, that signal can
be obtained from the vertical frame rate.
Have your dealer's tech take a look at it, unless you know what
you're doing…I wouldn't suggest you attempt swapping the 8520 yourself.
They are VERY sensitive to static.
Don
Thanks, Don, for the information on the demise of my A2000's 8520.
Haven't noticed any problems with the parallel port or internal floppy yet.
Its interesting you should mention jumper J300. When I first swapped
motherboards I found I couldn't keep my Supergen online on my system
because it would cause the normal RGB display on my monitor to
jitter…especially text on the workbench screen. Someone told me that C=
had shipped some of the newer boards with the jumper J300 set wrong, with
pins 3 and 4 jumped instead of 1 and 2. I checked, but mine was set
correctly. Maybe I zapped one of the 8520's while checking this.
thanks for your help…just wish it wasn't a 90 mile round trip to the
nearest dealer!
Nick Moore
Nick, two possible causes there… first is that one of the timers on the
8520 chip is dead. Or, the power supply, which provides one of the system
timing ticks is gone. Either way it's a hardware problem that means a
visit to your dealer.
Khalid.
thanks for the help, Kalid. Guess a trip to the nearest dealer is in my
immediate future!
Nick Moore
Nick;
Since you know where the jumper is located and how to check it……. The
power supply tick signal is a little touchier than the vertical retrace
signal…. so, you might want to swap the jumper and see if the clock
works. My ami 2000 has been running on the vertical sync signal since
shortly after I got the machine (the power supply tick was bad). I don't
use a genlock so can't say how that would affect the use of one. Also, the
jumper is three pins, not four.
73, bill
Good idea, Bill (about switching jumper to see if tick loss is from power
supply). Thanks.
Nick