| From: | Sam Jordan |
| Date: | 17 Dec 99 at 22:41:04 |
| Subject: | Re: [warpup] Re: other WarpOS problems |
Am 17-Dez-99 schrieb Tobias Seiler:
>> I bet you have a 604e/233. It seems to be the infamous LR-bug,
>> which always trashes bit 0 or bit 2 of your LR. This failure occurs
>> due to an overheated PowerPC. In most cases replacing the fan by
>> a strong 12V Pentium fan might help.
>>
>> In the meantime you can try aminet/hard/misc/CSPPC233Fix.lha as a
>> quick fix.
>>
>>
>> --
>> _ Frank Wille (frank@phoenix.owl.de)
>> _ // http://home.owl.de/~frank/
>> \X/ Phx @ #AmigaGer
>Well, I had idea about this LR bug. (actually a friend of mine had it)
>As this problem only occurs with 233MHz cards and as I understood it these
>cards where all delivered with 060 processors at 60MHz our thoughts where
>if this could be an overclocking problem to the motherboard.
>For a 200MHz card the divider for the system clock would be 4 to get 50MHz.
I would rather say, that 200Mhz cards have a 66Mhz bus clock with a
multiplier of 3. There exist other boards (180Mhz, 150Mhz) which all
have a multiplier of 3.
BTW, 'showinfo' in the WarpUp directory reports the bus clock.
For my card (180Mhz) it's 60Mhz.
>I dont really think that p5 has designed the completele thing in a asyncron
>way.
>So when the divider remains at 4, 233/4 = >50. So what happens to the system
>speed then ?
>Maybe I'm wrong. It's just an idea.
You're most likely right in the assumption, that Phase5 used boards
for 233Mhz-CPU's which were not designed to deal with such clock
frequencies. They simply overclocked the boards IMHO and as it seems
they did never say anything about it, so people had to find out
themselves, that they need a much stronger cooler.
But I'm actually not sure whether the problem is the bus frequency,
maybe it's still 66Mhz (someone with 233er can confirm or correct
this value). I would rather guess that the increased power
consumption/heating due to the increased core clock is the real problem.
Overheating is the problem Nr. 1 for AMIGA hardware nowadays.
bye