Jump to content
Sign in to follow this  
Sporny Kun

Conversion of the schematics of the Atari STE motherboard into Kicad

Recommended Posts

The title says all, I have converted the existing schematics into Kicad. This is the 1.0.0 release, and hopefully there will be no erratum.

https://github.com/sporniket/kicad-conv ... /tag/1.0.0

The release provides a PDF with the schematics, a PDF with the silkscreen of the motherboard reconstruction, and a ready to use Kicad project (libraries included).

For the schematics, I have decided that :

  • Symbols for the ICs will show the physical layout of the pins, as it makes it easier to spot the pin on the real IC (for me at least). And because thanks to that, the GSTMCU still fits on an A4 sized sheets. On one occasion I deviated from this choice (for the dma sound amplification and filtering) as it obfuscated too much the circuit.
  • Each original sheet is splitted so that each sub-part is printable on a A4 sized sheet.
  • A Table of content

 

I also have mentionned some fixes that would be usefull/mandatory.

  • DMA pull-up on databus
  • WD1772 pull-ups
  • LMC audio mix fix
  • RGB Video ghosting fix
  • C415 that should be reversed

 

The projects contains an approximative reconstruction of the motherboard's PCB. It will be good enough to locate a given component and to know how a signal is distributed accross the board. And it allow to make nice 3D renderings.

02--pcb-render-overview-front.thumb.jpg.eb7c30d9059d9f115dcb3b3017ce45a1.jpg

03--pcb-render-overview-back.thumb.jpg.8d894b146f1159f15baca41982912ea3.jpg

04--pcb-raytrace-north-west.thumb.jpg.b9ad32a0c3bd24e1c135d9be3aa3166b.jpg

05--pcb-raytrace-north-east.thumb.jpg.b8c9d2d0db8864497b6f8bc976c5aa8d.jpg

06--pcb-raytrace-south-east.thumb.jpg.cc080577b41e2d17cea4ec9a877700ac.jpg

07--pcb-raytrace-south-west.thumb.jpg.6fd1b3b63d1d9725488c657d79513afb.jpg

  • Like 2

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...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...