Hi,

I have the Radeon 9200 with my AmigaOne G3-SE, however only 128MB of the total 256MB is recognized.
I read some place that this is due to the driver only initialising the card's memory from bank 1, ignoring the memory in bank 2. Most cards have only one bank, some (probably later ones) have two, apparently.

Is there any solution that is known for this ?

I know 256MB is probably not needed with this card, as most older 3D codes under AmigaOS (OpenGL 1.3 class card..) uses less than 128MB. . however from a curiosity viewpoint, I would like to understand the issue. I also wonder if this affects the card's memory bandwidth (for instance limiting it to 64-bit). It has a 128 bit wide memory interface to the total 256MB.

On a side note, I can never get this card running in full HD, however not issue with the 9200 SE card I have.. even same settings used.

Thanks!

HI,

I was wondering if anyone with the G3-SE have overclocked it. And if so, how far and with what voltages ? I understand that at least the G4s have been fried before, so what is the safe area in terms of voltages ?

I have only tried to increase the multiplier up to 5 (5x133.33 = 666.66MHz), from the standard 4.5 (600MHz). This without increasing any voltage (1.59V) so it should be completely safe. However, at some points it can then crash (for instance in the middle of Quake 3), so I would like to increase the voltage one tick up (1.64V), and see if it is stable then.

Thanks!

@Helloworld

This is really interesting!

I got the AmigaOne G3-SE with a Radeon 9200 card installed, however only half of the 256 VRAM is recognised by the driver. Apparently it's due to only the first bank of memory being initialised.

Did you get your HD7750 card working at the end ?
And, I suppose the 66MHz PCI slot maybe could not be used, even with AGP card unplugged ?

@Lemen

Great to hear that those documents still exists !

I have the AmigaOne G3-SE.
When I got it it had two blue cables soldered on the back-side, however I would love to know the details of this and to check if it's the full fix applied.

Would it be possible to send me a copy also ?

Besides from what looks like the fix applied, I have the Sii0680 card, a new NEC USB 2.0 card and a Forte sound card installed. However, the machine is very picky, if I remove the USB card then it affects the IDE card and will not allow UDMA 6 mode suddenly. I have 2 GB registered ECC ram installed with no issues.

Thanks a lot !


@Rob

Thats also very interesting information!
My system seems to have both fixes applied on the back side. However, it still has issues that happens with it. I have disabled the onboard a1 IDE as using UDMA 6 with it would lead to corruptions, and also the onboard USB ports. I am able to use UDMA 6 with the attached Sii0680 IDE and Sii3114 IDE boards if my NEC USB card also is installed in a PCI slot, currently the middle one (..!).
Onboard ethernet seems stable as long as the NEC USB is not used. If I have even a keyboard plugged into the USB NEC card it can suddenly crash the machine when the onboard ethernet is used.. or just by itself. So, I don't use the USB, either onboard or the NEC card.

I'm curious how the machine would act if I removed the fixes and depended on the PCI IDE and USB cards like I do now.. Maybe it would actually be stable, as long as I left the onboard IDE and USB disabled and alone, both in U-BOOT and disable the loading of the drivers in Kicklayout.

By disabling DMA, you mean setting the transfer mode to PIO in U-BOOT as opposed to one of the UDMA options ?
Is there some trick I could do to make the NEC card stable when used ?

Thanks for the information!

EDIT: I got hold of the Eyetech docs, and also looked at the backside of my board. The only fix that seems to be installed is two wires going from the ArticiaS to the 3com Ethernet chip. Maybe they routed it to two exclusive PCI signaling pins. Not sure of the details, yet.
My board definitely still has the DMA issue, apparent when using USB.
Maybe I should apply the fix from ArticiaS northbridge to the VIA southbridge.