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Let's build a CTPCI!

General discussions or ideas about hardware.
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Rustynutt
Posts: 230
Joined: Fri Sep 29, 2017 8:24 am
Location: USA

Re: Let's build a CTPCI!

Post by Rustynutt »

foft wrote: Tue Mar 21, 2023 7:50 pm 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.
foft
Posts: 346
Joined: Mon Mar 28, 2022 12:20 pm

Re: Let's build a CTPCI!

Post by foft »

The Atari ‘green bar’ dma test passes. Is that accurate enough?
marss
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Joined: Sat Aug 25, 2018 11:09 pm

Re: Let's build a CTPCI!

Post by marss »

I buy one if you have one left ;)
foft
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Re: Let's build a CTPCI!

Post 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?
mikro
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Location: Kosice, Slovakia
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Re: Let's build a CTPCI!

Post 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
foft
Posts: 346
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Re: Let's build a CTPCI!

Post 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
mikro
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Re: Let's build a CTPCI!

Post by mikro »

Not really. I remember Saulot has done some experiments with double buffering: https://bus-error.nokturnal.pl/article1 ... with-XBIOS
foft
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Re: Let's build a CTPCI!

Post by foft »

foft wrote: Tue Mar 21, 2023 4:37 pm 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.
foft
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Re: Let's build a CTPCI!

Post by foft »

marss wrote: Wed Mar 22, 2023 9:01 am 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.
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HigashiJun
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Location: Tokyo

Re: Let's build a CTPCI!

Post by HigashiJun »

foft wrote: Wed Mar 22, 2023 8:35 pm
marss wrote: Wed Mar 22, 2023 9:01 am 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 ?
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