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Re: Let's build a CTPCI!

Posted: 22 Mar 2023 04:32
by Rustynutt
foft wrote: 21 Mar 2023 19:50 Just to add a couple of final pics.

Here it is, now I need to squeeze it back into the Space Case:
with_radeon.JPG

Now I need to find some software other than gembench to run :lol:
gembench.JPG
How is the CT63 buffering working in lieu of a "clock patch" with SCSI and Floppy DMA? I've ran the CT60e up to 46MHz max, but no luck stabilizing SCSI/Floppy at 23MHz bus.

Kronos has a few comparative benchmarks included with the archive.
Of interest with your setup, one a CT60 around 100MHz with SuperVidel, and a Vampire bench included.

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 07:47
by foft
The Atari ‘green bar’ dma test passes. Is that accurate enough?

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 09:01
by marss
I buy one if you have one left ;)

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 17:37
by foft
So, did anyone make any 3d stuff for these?

P.S. my google fu is failing me, can someone please link me to the register specs for these Radeon cards?

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 19:33
by mikro
When CTPCI was a thing, there wasn't any 3D printing available. ;-) And then everybody with CTPCI disappeared...

Some info abour Radeons can be found here: https://mikrosk.github.io/ct60tos/ctpci ... erview.htm

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 20:11
by foft
Ah no I meant 3D graphics, not 3D printing:)

Register level docs, I mean something like Matrox released here. I remember I had a similar doc for the Rage Pro iirc.
http://www.bitsavers.org/pdf/matrox/G40 ... un1999.PDF
I didn’t find something like the RV280

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 20:26
by mikro
Not really. I remember Saulot has done some experiments with double buffering: https://bus-error.nokturnal.pl/article1 ... with-XBIOS

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 20:31
by foft
foft wrote: 21 Mar 2023 16:37 There is also a 2nd problem, I get a parity error depending on how I position the card, so perhaps there is a bad connection somewhere.
I realised the likely cause of this one. I'm using 40 IDC wire cables to connect it up. I'm meant to use 80 wire cables, which basically have a ground line between each one.

Re: Let's build a CTPCI!

Posted: 22 Mar 2023 20:35
by foft
marss wrote: 22 Mar 2023 09:01 I buy one if you have one left ;)
Well I managed to order 4 extra PCBs and 9 extra chips. I might have to put some of them together at some point...

P.S. If anyone wants to swap a completed one for a supervidel let me know.

Re: Let's build a CTPCI!

Posted: 23 Mar 2023 10:41
by HigashiJun
foft wrote: 22 Mar 2023 20:35
marss wrote: 22 Mar 2023 09:01 I buy one if you have one left ;)
Well I managed to order 4 extra PCBs and 9 extra chips. I might have to put some of them together at some point...

P.S. If anyone wants to swap a completed one for a supervidel let me know.
Better then to set a queue for interested folks ?