@Georg

Quote:

BTW: Does AOS4 use halt/hlt/stop or whatever it is called on PPC when being idle?

Not at the moment. The idle time is spent busy-looping in an "idle task". Using a proper halt instruction is somewhere on the TODO list, which unfortunately seems to grow rather than shrink

Normally it isn't a problem, but if you have overclocked the machine, or cooling is inadequate, or core voltage is set incorrectly (the machines are usually clocked at 800 and overclocked by dealers and/or users without this adjustment), then a crash might be the result.

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@Georg

Quote:

BTW: Does AOS4 use halt/hlt/stop or whatever it is called on PPC when being idle? To make cpu sleep until interrupt happens. Instead of busy looping or so.

It currently only uses the (automatic) dynamic power management. The PPC's have nap modes, but as Jörg already said, it's not a simple instruction. It's a mode that has to be entered with a specific protocol, which is unfortunately also different from CPU to CPU. So currently, it's not sleeping when idle.

As always, it's on the Todo list

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Thomas, the kernel guy

"I don't have a frigging clue. I'm norwegian" -- Ole-Egil

All opinions expressed are my own and do not necessarily represent those of Hyperion Entertainment

@Rogue

Re the volage settiings

Do you (or anyone else) know what the settings should be for a MPC 7445 / MPC 7455 v2.1 ?

I have no idea what happened to that little scrap of paper I got over 2 years ago

I seem to remember altering some DIPS a while ago, thinking I was adjusting clock speed, but was working in a dark corner and then realised I'd been flicking the wrong ones. I thought had them all right but it would be good to make sure

@AmigaOneProductions

I've found the settings, but in case antone else wants them, this is what I found

Intuition Base CPU Speed Settings

This thread for voltage settings

I'm testing for stability now with 933MHz at 1.69 volts

@AmigaOneProductions

Quote:

AmigaOneProductions wrote: @AmigaOneProductions I've found the settings, but in case antone else wants them, this is what I found Intuition Base CPU Speed Settings This thread for voltage settings I'm testing for stability now with 933MHz at 1.69 volts

Careful. The correct voltage depends on the chip. Normally, you should look at the serial/part number on the CPU since the serial number "encodes" the voltage setting

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@Rogue

Hmm, for me to see the numbers on the chip I would have to remove the heatsink. To remove the heatsink I would need to remove the motherboard from the case due to the way it's attached.
The CPU seemed to be getting a bit warm at 1.69, so I've stepped it down to the next voltage.

The aim is to get it to run at the lowest voltage and still be stable.

@unimon

I can see on your sig that you have an overclocked A1 - what kind of cooling do you have? Is it the std. blue sunon or something else?
In any case I would check how the cooler is attached and whether there are too much or too little cooling paste.

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@AmigaOneProductions

Quote:

The aim is to get it to run at the lowest voltage and still be stable.

No. The aim is to run it at the _correct_ voltage.

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Thomas, the kernel guy

"I don't have a frigging clue. I'm norwegian" -- Ole-Egil

All opinions expressed are my own and do not necessarily represent those of Hyperion Entertainment

@AmigaOneProductions

It should be right.

At 933 my A1 is stable with 1,64 - 1,69
At 1000 it is stable with 1,79.

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ikir

@Rogue

Quote:

Careful. The correct voltage depends on the chip. Normally, you should look at the serial/part number on the CPU since the serial number "encodes" the voltage setting

I haven't gotten around to checking mine yet, but this unfortunately answers my question. I was wondering if what shows up on the string in the workbnech window was identification enough. After hearing some of the earlier stories of how close the screw heads of the fan are to the surface mount components on the CPU card, I was hoping I wouldn't have to take that apart.

I'll be as nervous as when I put the Rejuvenator in my 1000 the first time!

Paul

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Builder of Frankenthousand, the monster A1000
The Young Frankenthousand A1-XE G4
X5000

@Paul

(replies to self)

Quote:

I was wondering if what shows up on the string in the workbnech window was identification enough.

I looked at Freescale, and from what I can see (assuming that the workbench CPU identifier 7441/7451 probably means I have a 7451 with the same CBGA count of 483 as the newer 7455's) then the voltage might be 1.6, 1.75 or 1.8 depending on the model.

I guess I can start low once I get in there, and just work up until I get stability.

Paul

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The Young Frankenthousand A1-XE G4
X5000

Well it looks like I've finally got it sorted, been running for longer than 5 mins now (20 mins and counting )

I had a look at the heatsink, it was not sitting properly on the processor, it was raised at one end so only a small part of the heatsink was in contact with the processor. (and it wobbled slightly if you touched it, not good)

I removed the heatsink / fan, cleaned off all of the old heatsink paste and applied fresh heatsink paste.

I replaced the horrible plastic retaining clips with good old fashioned nuts, bolts and springs, there is NO WAY that heatsink is going to wobble again

The CPU voltage is now correct for the processor AND it's running at it's correct speed of 933Mhz.

OK, 20 mins is not a proper test, but it's 400% longer than it lasted before, I'll leave the A1 running overnight, crunching RC5 keys, if it's still working in the morning, then I think it's safe to assume that all is well.

@Paul

(here I am replying to myself again)

Quote:

I guess I can start low once I get in there, and just work up until I get stability.

Well I did that. It got worse. I even started getting freezes from the update CD boot. I even got freezes when I had the VCore voltage raised.

I decided my PSU must be bad (a blue case LED seemed pretty dim.)

I guess I must be pretty dim. I bought a new Antec case and PSU. I transferred everything over. I popped in the update CD and booted. 15 seconds later I had a grim reaper again.

It finally occurred to me to try installing from the original OS4 pre CD.

Amazing! Everything worked fine. This whole mess including the cost of a new case was all because my update CD was either a bad download or a bad burn.

Live and learn.

Maybe I'll try burning a CD from my wife's PC.

Paul

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Builder of Frankenthousand, the monster A1000
The Young Frankenthousand A1-XE G4
X5000

@All

Quote:

I was wondering if what shows up on the string in the workbnech window was identification enough

Do we have an answer to this? I'd rather not remove my heatsink as it is pretty much imovable at the moment.
My Workbench screen title shows a Motorola MPC 7445 7455 Apollo processor.

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After a decade away from the scene, I am back!

@amipal

Are you using a Catweasel mIII? Paul Zager and I had one. We pulled 'em out
and life is now sweet!

OS4pre allows CW to work because of "cia-resources.kmod", but it's gone in
the OSupdate1.

Thanks -- Hans-Jorg and Thomas Frieden

Snuffy

@Snuffy

Nope, no Catweasel here. The reason I asked was merely to make sure my voltage was correct!

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After a decade away from the scene, I am back!

@Snuffy

Yes. . . REALLY sweet. I've now moved my hardware back into the
Raidmax case (but keeping that nice Tru-Power Antec PSU I just picked
up.) Man is this computer QUIET now! And I now have that nifty blue
backlight "Z" on the front of my case again. Some people have
monogrammed shirts. Geeks have monogrammed computer cases!

Paul

_________________
Builder of Frankenthousand, the monster A1000
The Young Frankenthousand A1-XE G4
X5000