| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1273.1 | oops, pine is "pins"! | WJG::GUINEAU | t' = (t-(v/c�)x)/(1-(v�/c�))^� ? | Fri Mar 25 1988 14:57 | 11 |
|
Check the pine on the A500 where the A501 plugs into. I had all kinds of
trouble getting that thing in. The metal shield was soldered in such a way
that it hit the A500 chassis. I needed a crow bar to make the thing fit
in. And then I bent a pin (unknowingly) and Amy would crash when I
hit the top memory locations.
I suspect your problem is similar.
John
|
| 1273.2 | it works ok for me | MPGS::GOGUEN | | Sat Mar 26 1988 09:03 | 12 |
| I justed installed the 501 in my A500 about a week ago, and I have
had no problems with it. I will confirm it is a tight fit though, but I
managed to get it in there ok. (if my memory serves me correct, I think
the documentation that microbotics put in with the 501 stated that "for
A500 owners there would be a tight fit when you install 501 and put the
cover back on. It's possible you my have a damaged 501 or you somehow
damaged it putting installing it.
Just wanted to let you know it does work.
-paul
|
| 1273.3 | not pins | HSK03::HEISKANEN | Pekka K. Heiskanen | Tue Mar 29 1988 10:12 | 29 |
|
Well the pins are in two rows as in the army.
So maybe not that.
The poblem goes away when I power down the system.
And then say after 30 seconds power it up. Then
it is OK during some (4 to ...) boots.
What is the system doing at the very beginning ?
I mean that when I try to reboot with empty drive
it does not even show the picture of disk on
the screen. It gurus . And then power down and
up ...O.K for some boots.
Power problem ? Does the memory take too much?
Bad power supply?
Bad expansion memory ?
Static electricity ?
I do not think that the problem is at this time
between the AMIGA and the bench.
Still hoping,
Pekka
|
| 1273.4 | Check shield contact w/expansion unit shield | 4973::SULLIVAN | Steven E. Sullivan | Tue Mar 29 1988 11:56 | 23 |
| Although it is not the same perhaps my adventure with the
comodore memory expansion for the A500 would help.
After (and sometimes before) installation of the A500 memory
expansion my A500 would sometimes not boot and often guru. When it
would not boot the power LED would just blink at me. To get it to
work I used the stone knives and bearskins approach and beat on the
bottom in a "sensitive" place. This would eventually bring it back to
life for a while.
Eventually I found removing and re-installing the memory
expansion would cure the problem for a while. Once this was
discovered I became suspicious of grounding and shielding. The shield
on the A500 memory expansion has a "spring" connection with the
shield of the A500. The shields were not making good contact so I
distorted them slightly to increase the pressure.
Since improving the shield contact I have had NO problems at all
with the A500/A500 memory expansion.
Hope this helps!
-SES
|
| 1273.5 | | BAGELS::BRANNON | Dave Brannon | Tue Mar 29 1988 12:18 | 9 |
| re: .4
another triumph of sledge hammer school of hardware debugging!
I had to do the same sort of thing to get the external memory
expansion to work on my A1000. Memory seems to be very sensitive
to flakey shielding.
-dave
|