AmigaONE Review Running OS4 Video

[Lo]

have only got a 56k connection its as slow as a snail

Wow, I got 290 connect, fastest yet for me.  :-)  :-)  :-)  :-)  :-)  :-)
Well, it Was 3 am here ;-)

[Cryten]

Elwood: Thanks for video!

Even though the graphic updates seem a bit slow at the time being, it's exciting to finally see Amiga OS4 in action. Really looking forward to see more!  :-)

[jack]

Wilse wrote:
I never managed to keep mine stable under 2.4.21 with DMA enabled. Do we have an official statement from Hyperion on this or is it just your personal experience?

IMHO, there're lot of parameters wich can affect stability, such as:
verson of X, number of pci cards and pci/network usage. I had problems with dma/xf4.3 on debian/ydl3 (2.4.21). Now I'm running ydl3/2.4.22, dma on - things are significantly stabler here.

Jack

[Glaucus]

I never managed to keep mine stable under 2.4.21 with DMA enabled. Do we have an official statement from Hyperion on this or is it just your personal experience?

Make sure you're using high quality IDE cables. My Athlon system was rather unstable when I had UDMA5 set, until I replaced my cables and it worked flawlessly ever since. Worth a shot.

  - Mike

[downix]

@Jack

This is true irregardless of which system you run.  My Athlon kept locking up, crashing, dying.  Turns out the video card and southbridge hated each other.  Swap the mobo, and everything is fine.

[KennyR]

Glaucus wrote:
Make sure you're using high quality IDE cables. My Athlon system was rather unstable when I had UDMA5 set, until I replaced my cables and it worked flawlessly ever since. Worth a shot.

On top of that, it might be better sticking to normal ribbon IDE cables rather than cylindrical ones. They might allow better airflow, but apparently there's a lot of crosstalk.

[CodeSmith]

@Glaucus:

IIRC you have to use a special cable for UDMA modes 4 and 5 (it's the one with lots of small wires but the same amount of connections as the "normal" cables).  This is the case even with PCs, I think it's got to do with the thicker wires causing interference on each other at high transfer speeds, the thinner wires don't have that problem.

@Downix:

[Argo]

That would be the 80 wire cables. The extra wires are ground, one for each data wire. They help reduce line noise and interferance, which at high data rates can adversly affect the data transfered on the cable.

[bhoggett]

@KennyR

On top of that, it might be better sticking to normal ribbon IDE cables rather than cylindrical ones. They might allow better airflow, but apparently there's a lot of crosstalk.

It might depend on the quality of the cable. I can't say I've ever had any problems whatsoever with mine.

...or it could be an urban myth. A lot of these tend to be spread about when so called engineers don't know what's wrong but want to seem knowledgeable.
 :-P

P.S. Actually, see Argo's reply. That looks closest to the truth to me.

[Piru]

@CodeSmith

This is the case even with PCs, I think it's got to do with the thicker wires causing interference on each other at high transfer speeds, the thinner wires don't have that problem.

Well, you thought wrong. Like Argo pointed out the extra 40 wires are separate ground wires for each signal wire. Check pcguide Ultra DMA (80-Conductor) IDE/ATA Cables for details.

[Rogue]

Do we have an official statement from Hyperion on this or is it just your personal experience?

Why should Hyperion make a statement about DMA in Linux?

[Glaucus]

On top of that, it might be better sticking to normal ribbon IDE cables rather than cylindrical ones. They might allow better airflow, but apparently there's a lot of crosstalk.

Well, funnily enough, the cable I was using was the cylindrical type. Also funny is that I replaced it with another brand of cylindrical cable. Both were rated for UDMA5 (80 wire). And yeah, the extra wires are ground wires as others have mentioned. It was just a matter of build quality.

  - Mike

[The_Editor]

Well,  I'm using pretty lighty uppy cylindrical cables in my A1 ...  Stable as a rock... NO probs.. Apart from it being poxy linux.

[downix]

@CodeSmith

Someone talked about hardware conflicts, in reference to the A1, and I thought I'd point out a similar experience I had with an EPoX Athlon mobo and my Evil Kyro video card.  Such bugs are not limited to those of us that run the alternate processors of the world, ya know?

[Graak]

It might depend on the quality of the cable. I can't say I've ever had any problems whatsoever with mine.

Serial ATA to the people! It really rocks compared to PATA (Parallel ATA). Not performance-wise (today's drives can't handle such high speeds) but it's sooo much more convinient with small cables than with those huge PATA-cables :-)

[MarkTime]

Wow thanks to the webmaster for those mpg's on OS4, it is also the first time I've seen OS 4 in action.

It will be a long time, probably, before an OS 4 show is in Tennessee, but maybe someday :-)

I cannot wait till the complete systems are on sale!
Or rather I should say, I can wait, now, because it so soon...you could tell when I couldn't wait cause I was cranky and had a tendency to shout.

This community always amazes me...still strong after so many years, and now two hardware/os platforms are just about ready for launch!

Looking like a great 2003/2004 for Amigadom.

You know what, I'm even going to do an AmigaGuide format of our books, not for sale...will give them away, but just as a nod to the community.

peace,
MarkTime
Delfania