68020 booster

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rpineau
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Re: 68020 booster

Postby rpineau » Thu Feb 09, 2017 5:37 pm

I haven't even started on the board layout for STF, We'll probably do the Mega ST version before the STF.
For the STF, the space, as you said, is even less that in the STE, so I'm not yet sure how it's going to fit.
And for it to fit it'll have to be this mother board model : http://www.atari-wiki.com/index.php/Fil ... FM_Dio.jpg

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Re: 68020 booster

Postby jvas » Thu Feb 09, 2017 5:42 pm

Couldn't it be more flexible if it was connected to the CPU socket with a ribbon cable?

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Re: 68020 booster

Postby rpineau » Thu Feb 09, 2017 5:53 pm

It could but a ribbon cable is not the best for signals quality. But I can think about it.
You still need to find some space for it in the machine, but I'm open to suggestions
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Re: 68020 booster

Postby jvas » Thu Feb 09, 2017 6:02 pm

And with the cable, there is no need for different board layouts. The same board would fit in every machine. Just the "cpu cable" had to be specific.

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Re: 68020 booster

Postby wongck » Thu Feb 09, 2017 11:37 pm

rpineau wrote:And for it to fit it'll have to be this mother board model : http://www.atari-wiki.com/index.php/Fil ... FM_Dio.jpg

This is looks like the model of STFM motherboard that I have. However, mine only have 2 rows of DRAM.
This from my webpage on upgrading 512 to 1024K ram https://sites.google.com/site/probehous ... o-1-mb-ram
My guess is RAM layout difference only.
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Re: 68020 booster

Postby wongck » Thu Feb 09, 2017 11:38 pm

rpineau wrote:It could but a ribbon cable is not the best for signals quality. But I can think about it.
You still need to find some space for it in the machine, but I'm open to suggestions


That what the CTPCI does... have couple of IDE 80-pin cables, bringing it outside the box.
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Re: 68020 booster

Postby rpineau » Fri Feb 10, 2017 1:21 am

I'm not sure I want to run wire for the signals.. actually I'm fairly sure I don't want to do that to the outside of the machine. The signals in a ST are already not clean (as opposed to the signal on the CT-PCI) so this would create more problems than we want to deal with.
We'll keep thinking about what can be done.
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Re: 68020 booster

Postby rpineau » Tue Feb 14, 2017 5:58 pm

So after looking at a better connector solution, we're going to take a look at the Hirose FX2-120P-1.27SV and FX2-120S-1.27SV receptacle and connector. I'll order a set and will take some measurements.
This doesn't mean we'll be able to put any and all cards in the STE, but if we put the connector as far as possible toward the back we can may be have "short" cards that fits.
This also allows us to have a fully featured card that doesn't need extra soldering of a header to make it "complete".
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Re: 68020 booster

Postby rpineau » Thu Feb 16, 2017 12:45 am

so the connector above are not easy to find so we've also ordered some APM G832MB011206222HR and G832MB111205222HR receptacle and plugs and we're going to check the mechanical strength (these are also 120 pins so it's a direct mapping from one to the other for me in Eagle).

We'll keep you posted on our progress.
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Re: 68020 booster

Postby rpineau » Mon Apr 24, 2017 3:09 pm

Quick update:
We're still working on this ... but I had some issues.
The PCB quality is not what I was expecting .
My first MSTE board that was working is no longer working. So far by doing a continuity test I have found at least 4 signals that are no longer connected (I might be able to fix these).
I tried to build the last (of 3) PCB, and found out that one also have bad tracks... and a peeled via (if not more). This one is going to be harder to fix as I need to solder a wire on one of the CPLD pin (it's a TQFP 100 ... fun fun fun).
Juliusz MSTE card also had a bad track (he fixed it).
So as of now I have no working card to finish the few things we need before we release the card. Juliusz has 2 working card (STE and MSTE).
So right now I'm looking for a new PCB house to see if I can get better quality 4 layers board without breaking the bank ( the 3 MSTE and 3 STE board were already not cheap...).

So we're still on it but it will take more time than expected as I need to fight PCB track issue instead of working on the VHDL code and feature.
Rodolphe
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Re: 68020 booster

Postby Gaiyan » Wed Jun 07, 2017 3:17 pm

I'm just voicing my interest in this project and pledge to buy one if it becomes available in hardware form. Even as a kit. Soldering is fine for me.

Edit: I'm in for a MSTE version.
Image

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Re: 68020 booster

Postby rpineau » Wed Jun 07, 2017 3:41 pm

We're in the process of ordering the new revision of the pcb for our V3 proto which if everything goes well will become the final version (we will remove the test headers for the final version but that's about it).
We don't intend to sale it but to make all files available as an open source project (PCB Eagle files for STE and MSTE, VHDL code, ...) so anybody can build one. We might talk to Lotharek to see if they want to produce it.
We still need to test on STF and Mega ST (I made some dil64 to PLCC adapter so we can test with our existing board before doing a STF and Mega specific layout).
Rodolphe
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Re: 68020 booster

Postby jvas » Wed Jun 07, 2017 3:47 pm

Great! Thanks for the update!

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Re: 68020 booster

Postby piotrk » Wed Jan 24, 2018 11:08 am

I read the entire discussion. Impressive work.

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Re: 68020 booster

Postby piotrk » Wed Jan 24, 2018 11:08 am

I read the entire discussion. Impressive work.

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Re: 68020 booster

Postby rpineau » Wed Jan 24, 2018 3:09 pm

Thanks. We're still working on it.
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php

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Re: 68020 booster

Postby viking272 » Wed Jan 24, 2018 4:44 pm

Great project, I've just read about it today too.
I'm interested in one for an STE once they're produced. Thanks guys.

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Re: 68020 booster

Postby rj1 » Wed Jan 24, 2018 5:11 pm

Thanks,
Well we won't produce it ourselves, rather publish the design when ready.

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Re: 68020 booster

Postby mikro » Fri Jul 13, 2018 4:24 pm

jvas wrote:I think, with a pcb, you could get better signals, but not as flexible as ribbon cable. Something like the CTEX for the CT60

http://nature.atari.org/Pics/IMG_0619.JPG (the white board)

Just for the record, that is not a CTEX. That's Nature's home cooked expansion slot extender. The CTEX looks a bit similar but its purpose is to, among moving the CT60 closer to the top, connect the CT60 plus another expansion card (ScreenEye, Expose, NOVA, Eclipse, ...) on one board:
ctex.jpg

I'm about to start experimenting with the ScreenEye + CT60. :)
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Re: 68020 booster

Postby rpineau » Sat Jul 14, 2018 3:08 am

And how is that related to the 68020 card we're doing ?!
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
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Re: 68020 booster

Postby mrbombermillzy » Sat Jul 14, 2018 8:47 pm

@rpineau: lol

However, while youre here, any news?

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Re: 68020 booster

Postby rpineau » Sun Jul 15, 2018 1:41 am

We've run into a few PCB issue (bad PCB). We're also testing ton STFM and also ran into issues so we're fixing the code.
The V3 PCB had a few errors (my fault) so we need to redo a round of PCB.
And of course... life got in the way so we're working on it as time permit but things are going slow but the good news is that we're still working on it :)
We even tested with 68030 on the card (using an adapter) up to 50MHz.
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php

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Re: 68020 booster

Postby frank.lukas » Sun Jul 15, 2018 5:34 am

Very important is Fastram and not a 50Mhz 030 CPU ...
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Re: 68020 booster

Postby rpineau » Sun Jul 15, 2018 7:37 pm

Very important for you...
I want a stable card(68020 and/or 68030). FastRam will be on a add-on card.
There is not enough space on these card to put more than 4MB of SRAM if we were to add it (5V or 3.3v with level shifters SRAM ) .. 4MB is not what I want and probably not what you want.
I want 128MB SDRAM or even more. So all of this will take time and before trying to add more things we need a stable platform to build upon.

Rodolphe
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php


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