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AuthorTopic: Mediator recommended Graphics card + related queries...  (Read 349 times)

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Offline darksun9210

Mediator recommended Graphics card + related queries...
« on: October 21, 2019, 02:23:25 PM »
So, with the re-juvination of my A4k, comes the mediator installation, and i'm sorry if i'm going over old ground. i did find a mediator thread from about 2003, but i figured i'd try to stay on point with a new thread.

I think i have the 5volt version of the mediator, but it looks like a jumper wire would be easy enough to run for 3.3volts to a slot.
so, what do you guys recommend as a graphics card to work with the mediator?

i see there is the radeon9250, and it looks like 5volt notched pci versions, are fetching about £40 on fleabay, but are "only" the 128meg versions. the 256meg versions look like they are notched for 3.3volts and as such, i guess won't work in a non 3.3volt mediator with out some work.
any real down side to running the 128meg card verses the 256?
also, from what i can see, there are no warp 3d drivers for the radeon 9250 on OS3.x. is this right?

the voodoo3 2000 and 3000 seem to have hit "retro/collector" status and are fetching £300 for a boxed example. to think of all the voodoo3 agp cards i've thrown in the bin years ago... also only 16meg onboard. but does have warp3d support? prices seem to start at about £150(!)

voodoo4/5 no chance now i guess :)

also seems you NEED to have a graphics card on the PCI bus to supply some local ram to the PCI side for, say, the NIC and Soundcard to be able to work?

I have an A4000Di mediator (circa 2002). I'm pretty sure this definitely 5volt only? i tried to buzz the 3.3volt pins on the board and got nothing. I'm pretty sure but is there anything else more obvious like a label i can look for to confirm?

Many thanks,

A500 Vampire2, A600 Vampire2, A1200 Bliz030, A1200 Bliz040, A1200 BlizPPC, A3k CS MK3060, A4k C=040, CD32 TF330
 

Offline amiadudeorwat

Re: Mediator recommended Graphics card + related queries...
« Reply #1 on: October 22, 2019, 02:34:06 AM »
Quote
any real down side to running the 128meg card verses the 256?
Not really.  You aren't likely to need that much VRAM without Warp3D.  Even then you aren't going to run high enough resolutions to run out of VRAM, even with Warp3D.  If you ever think you might want to install a PPC PCI card you want the Video Card to use less of the 512MB of Mediator memory space for the PPC memory space.  So 256MB of VRAM means you can only have a maximum of 256MB on the PPC card.  At least this is how I understand it works.

Quote
also, from what i can see, there are no warp 3d drivers for the radeon 9250 on OS3.x. is this right?
There are some youtube videos that suggest someone is working on this.  But no not yet.

Quote
also seems you NEED to have a graphics card on the PCI bus to supply some local ram to the PCI side for, say, the NIC and Soundcard to be able to work?
Yes, but not a 10MB NIC.

Quote
I have an A4000Di mediator (circa 2002). I'm pretty sure this definitely 5volt only? i tried to buzz the 3.3volt pins on the board and got nothing. I'm pretty sure but is there anything else more obvious like a label i can look for to confirm?
Yes, if it's from 2002.  The A4000 3.3V Mediators only came out in the last 6 years and they have a Black PCB.  Except the A1200 Mediators they have had 3.3V support via ATX power supply for a long time. 

The unofficial mediator guide is worth reading.
https://mediators.github.io/
 
The following users thanked this post: darksun9210

Offline darksun9210

Re: Mediator recommended Graphics card + related queries...
« Reply #2 on: October 22, 2019, 09:35:16 AM »
That explains a lot, many thanks again! that mediator guide is definitely worth a read.

i'll pick up a cheap radeon card to get going for now, and i'll keep an eye out for a voodoo3 for reasonable money.

I think if ever i do go for a PPC board it'll be a chance find of one of the "killer nic" solutions... but i can dream...

A500 Vampire2, A600 Vampire2, A1200 Bliz030, A1200 Bliz040, A1200 BlizPPC, A3k CS MK3060, A4k C=040, CD32 TF330