Jump to content
Sporny Kun

Need proofreaders : Atari STE schematics conversion into Kicad

Recommended Posts

Hello,

For my own needs, I have converted the Atari STE schematics (6 sheets of A3/A2 size) into Kicad : 28 A4 sized pages + a table of content page, the same annotations between the original and the conversion.

 

The release candidate (the pdf, and a tar.gz of the kicad project) is here https://github.com/sporniket/retro-computer-clean-schematics/releases/tag/c300780-001--Atari-STe-Motherboard--v1.0.0.rc1

I plan to do the final release by the end of August.

 

If you happen to find a typo, please report to me.

Regards

  • Like 3

Share this post


Link to post
Share on other sites

The release candidate 2 is online there : https://github.com/sporniket/retro-computer-clean-schematics/releases/tag/c300780-001--Atari-STe-Motherboard--v1.0.0.rc2

For this release candidate, I fixed some errors and adjusted some pins (mostly, bidirectionnal and output pins being promoted to 3-states, and some output promoted to open collectors), I also reworked the audio circuit for better understandability.

Having a reference PCB is out of scope, however I found enough data, namely a silkscreen and the soldermask of the top side of the motherboard, and the measurement of the main feature of the motherboard shape, so that I can initiate some groundwork.

 

large.2021-06-30--rabbit-hole.png.5776c0d44049201254d73274621d288c.png

 

Maybe (no promises) I could place the components to get a rendering.

  • Like 4

Share this post


Link to post
Share on other sites

You’re in for a hell of a lot of work. 🙄

Out of curiosity - Are the Atari STe two layer PCB motherboard ?

Would be cool conversion motherboard,  Atari St-->Atari STe of course I'm assuming all the other components needed are still available somewhere online?

Share this post


Link to post
Share on other sites
18 hours ago, Chri O. said:

You’re in for a hell of a lot of work. 🙄

Out of curiosity - Are the Atari STe two layer PCB motherboard ?

Would be cool conversion motherboard,  Atari St-->Atari STe of course I'm assuming all the other components needed are still available somewhere online?

To me it seems that it is 2 layers. Because until now I can follow all the traces, switching sides at the vias.

 

My design will use 2 inner ground plane, it saves me some routing issues. And I use regular through hole  PLCC sockets instead of soldered ICs or staggered pins PLCC sockets, so at some places I have to do a routing quite different from the original. This is just a recreation of the PCB "for educationnal purpose" : all will be wired as per the schematics, and if big luck is on our side, someone using this PCB could end up with a working computer.

 

The STE chipset have been substantially reworked, compared to the ST Chipset, so it would be difficult to have something that support both chipset at the same time.

Share this post


Link to post
Share on other sites

The last -hopefully- release candidate before the real one.

https://github.com/sporniket/kicad-conversions--atari-ste-motherboard--c300780-001/releases/tag/1.0.0.rc4

 

This release includes :

 

  • A standalone Kicad project (all custom libraries included and ready to use)
  • A PDF of the schematics
  • A PDF of the silkscreen
  • A small gallery
     

The schematics seems complete and free of errors, thanks to making the pcb. I also mentionned some hardware fixes (with related urls), only related to the schematics and "easily" doable :

 

  • DMA pull-up on databus (done on the floppy disc controller U301)
  • WD1772 pull-ups (done on U305)
  • LMC audio mix fix (done near U508)
  • RGB Video ghosting fix (done at C411)

02--pcb-render-overview-front.thumb.jpg.a57a0d0249e8aa6b4a90e03973d6df1e.jpg

03--pcb-render-overview-back.thumb.jpg.ad9c8e389f49b5e995c2440f09388184.jpg

06--pcb-raytrace-south-east.thumb.jpg.51f49d6e70b70b306dbecdc02c3feebd.jpg

  • Like 2

Share this post


Link to post
Share on other sites

How much could design be optimized? E.g. something like atari 1088xel or 576nuc project?

Share this post


Link to post
Share on other sites
16 hours ago, bani said:

How much could design be optimized? E.g. something like atari 1088xel or 576nuc project?

There is a remake project for the ST by Exxos, the current materialization is the "H5C1" https://www.exxoshost.co.uk/atari/store2/#0198 This one requires a "donor machine", for the casing, power supply and the chipset.

 

There is another project of remake using the ST chipset with an ATX form factor : http://www.atari.org.pl/forum/viewtopic.php?id=17585

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...