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Re: Project STacy (STaceX & others)

Posted: Wed Sep 20, 2017 8:09 am
by IngoQ
rpineau wrote:
Tue Sep 19, 2017 3:22 pm
As for the track length .. the shortest the better... always. If you intend to put more than one card... buffers .. buffers ... (data and address line at least).
Noob question: How do you do buffering?

Re: Project STacy (STaceX & others)

Posted: Wed Sep 20, 2017 8:20 am
by exxos
IngoQ wrote:
Wed Sep 20, 2017 8:09 am
Noob question: How do you do buffering?
He is talking about using something like 74LS244, which can be used as a bidirectional bus transceiver. Buffering the address and databus for example, and can also be used to isolate the bus if necessary.

Similar was done on the DMA port on the STE for example.

Re: Project STacy (STaceX & others)

Posted: Wed Sep 20, 2017 10:08 am
by Atarian Computing
Screen Clips

Every STacy owner who's ever opened up their computer knows of the screen clips in question. My 2 units had most of the clips broken and various botched methods were used to fix it. I came up with the following fix and it's pretty perfect.

I 3D printed the following clip:
Clips.jpg
Clips.jpg (25.83 KiB) Viewed 3426 times
Here is a picture of a broken clip:
broken clip.jpg
broken clip.jpg (395.41 KiB) Viewed 3426 times
This is an original clip:
original clip.jpg
original clip.jpg (332.58 KiB) Viewed 3426 times
And here is a fixed clip after glueing it:
Clip Glued.jpg
Clip Glued.jpg (302.18 KiB) Viewed 3426 times

Re: Project STacy (STaceX & others)

Posted: Wed Sep 20, 2017 1:46 pm
by Darklord
Late to the party but I've been following this thread which is very
interesting. :)

As far as I know, best I could determine was that that STacy's
TOS version is pretty much identical to TOS v1.04. I know that
Brad told me he thought it was different because of the shadow
chip too. I did rip the TOS though and posted it somewhere (forgot
where exactly now) but some of the more knowledgeable people
looked it over and said it was the same (I think one of them was
PPera, IIRC).

Hope this helps. :)

Re: Project STacy (STaceX & others)

Posted: Wed Sep 20, 2017 3:07 pm
by rpineau
IngoQ wrote:
Wed Sep 20, 2017 8:09 am
rpineau wrote:
Tue Sep 19, 2017 3:22 pm
As for the track length .. the shortest the better... always. If you intend to put more than one card... buffers .. buffers ... (data and address line at least).
Noob question: How do you do buffering?
As exxos said, 74ls245 (bi-directional so that bus masters can be on either side of the adapter) with control logic for the /DIR pin of the buffer chip.
If you're not afraid of SMD .. 74ABT16245 .. 16 bit bi-directional buffers.

Rodolphe

Re: Project STacy (STaceX & others)

Posted: Thu Sep 21, 2017 7:21 am
by Atarian Computing
Thanks Darklord. Good to see you here as well :)

Here’s my latest addition:
STacy and CE.jpg
STacy and CE.jpg (242.08 KiB) Viewed 3407 times
I will have to design and 3D print a faceplate for it.

Re: Project STacy (STaceX & others)

Posted: Thu Sep 21, 2017 4:06 pm
by Atarian Computing
I think this will do. Will have to clean it up a bit. I’ll look at painting it if I decide to paint the STacy.

CE Faceplate.jpg
CE Faceplate.jpg (345.4 KiB) Viewed 3401 times

Re: Project STacy (STaceX & others)

Posted: Sat Sep 23, 2017 9:11 am
by Atarian Computing
Holy crap! I had no idea how awesome CosmosEx is! Mine came with Raspberry Pi 3 so I had built in WiFi. I have a freakin’ CIFS shared drive on my TOS desktop wirelessly. Shared drive is on my Synology. This just blows my mind that this is actually on an almost 30 year old STacy.

Re: Project STacy (STaceX & others)

Posted: Sat Sep 23, 2017 9:17 am
by exxos
Atarian Computing wrote:
Sat Sep 23, 2017 9:11 am
Holy crap! I had no idea how awesome CosmosEx is! Mine came with Raspberry Pi 3 so I had built in WiFi. I have a freakin’ CIFS shared drive on my TOS desktop wirelessly. Shared drive is on my Synology. This just blows my mind that this is actually on an almost 30 year old STacy.
Yes its pretty cool :). I have a folder on my PC desktop which is my Atari c: drive over WiFi :)

Re: Project STacy (STaceX & others)

Posted: Sun Sep 24, 2017 11:38 am
by Atarian Computing
One of my STacy units had all the caps replaced. They did a pretty poor job aesthetically and possibly functionally as it is exhibiting classic bad cap symptoms. That inspired me to do a complete list of STacy caps using schematics and my other unit as reference. Here is the link to the PDF. I have used original specs.

https://drive.google.com/open?id=0ByRvu ... lF5TnoyWW8
Atari STacy Capacitor List.zip
(29.23 KiB) Downloaded 115 times