Jump to content
Simius

Sophia 2 - improved GTIA replacement

Recommended Posts

How to mount the Sophia 2 on the Atari 800 - the story in 8 pictures.

 

1. Replace GTIA with the Sophia 2. Use a new, precision socket.

2. Cut a gap with an angle grinder.

3. Remove a channel switch, bead and two axial 2200uF capacitors. Mount the bead on the bottom side of the MB.

4. Cut a hole in the bezel for the DVI connector.

5. Drill two 1mm holes next (5mm) to the old + holes for radial 2200uF capacitors and mount them with two additional wires.

6. Stick the DVI board with a 3M adhesive tape (~2.5mm thick)

7. That's it. 

20201201_143802.jpg

20201201_143915.jpg

20201201_144753.jpg

20201201_185242.jpg

20201201_185302.jpg

20201201_185326.jpg

20201201_185631.jpg

20201201_190714.jpg

Edited by Simius
  • Like 11

Share this post


Link to post
Share on other sites
5 minutes ago, unixdude said:

Simius, that is a beautiful install into an 800!

Like the ONLY thing I could see as an improvement would be a black DVI connector.

  • Like 2

Share this post


Link to post
Share on other sites

That looks great!

You will not see the connector when a DVI cable is attached.

For obvious reasons, you can't spray paint the metal and plastic parts of the DVI connector. But with patience and a brush you can paint the white plastic part.

Share this post


Link to post
Share on other sites

Very Nice @Simius ! I just recently diverted all my I/O from the side of my 800 to underneath though, so I'll use all your tips except Shield slit and DVI connector locations when I get mine! I'll definitely have to be creative with where I mount it, but wherever I mount it, one of these DVI-to-HDMI adapters will be more or less permanently connected to the DVI port on the 800:

 

 

IMG_20201201_210910.jpg

Edited by Gunstar

Share this post


Link to post
Share on other sites
13 hours ago, Almerian said:

That looks great!

You will not see the connector when a DVI cable is attached.

For obvious reasons, you can't spray paint the metal and plastic parts of the DVI connector. But with patience and a brush you can paint the white plastic part.

Black sharpie marker!

  • Like 1

Share this post


Link to post
Share on other sites

Where did you get those DVI panel connector with ribbon cable? or is it custom made? I guess it is not included with the Sophia 2...

Edited by manterola

Share this post


Link to post
Share on other sites
On 12/1/2020 at 8:20 PM, Simius said:

How to mount the Sophia 2 on the Atari 800 - the story in 8 pictures.

 

This is really cool, neat way! Thanks for sharing!

 

  • Like 1

Share this post


Link to post
Share on other sites

Important information, as there appears a doubts about a board orientation. This is pin 1.

 

Sophia2_pin1.jpg

  • Like 3

Share this post


Link to post
Share on other sites

Can't wait!... I know I sound like everyone else... but can't wait until you get to me.

 

(A compliment - not a complaint. --- Great work Simius)

Edited by MrFSL

Share this post


Link to post
Share on other sites
On 12/5/2020 at 11:01 PM, Simius said:

Important information, as there appears a doubts about a board orientation. This is pin 1.

 

Sophia2_pin1.jpg

I may be wrong but that appears to be correct if looking at the top of GTIA/Sophia2, it appears from the top picture in post #151 that the ribbon cable connector is located on the bottom of the board. If it is plugged into the CPU board properly in that image it would put pin 1 at the other end of the row.

20201201_143802.jpg

It also needs reminding that this image is of the older 6502 CPU board, the 6502C/Sally version has GTIA rotated 180 degrees.

 

Never mind, after a better comparison of the images it appears that the ribbon cable connectors are on opposite sides of the Sophia2 PCB in each picture

Edited by BillC

Share this post


Link to post
Share on other sites

Can someone give me details on exactly which cable to use if I want to connect my NTSC 800XL with Sophia 2 to a DVI input and/or a VGA input on a monitor?  Preferably a link to actual cables on Amazon.

 

Thanks!

 

Share this post


Link to post
Share on other sites

So how do you change the settings? It looks like the default resolution is something my current monitor doesn't support.

 

Frank

Share this post


Link to post
Share on other sites
1 minute ago, Frankie said:

So how do you change the settings? It looks like the default resolution is something my current monitor doesn't support.

 

Frank

Looks like I am having a similar issue.  One of my monitor's (Dell) is saying "Out of range signal. Cannot display this video mode, change the computer display to 1600x1200 @ 60Hz"

 

And then another monitor (Samsung) is just showing black screen.

 

This is via DVI input.

 

 

 

Share this post


Link to post
Share on other sites
10 minutes ago, Frankie said:

So how do you change the settings? It looks like the default resolution is something my current monitor doesn't support.

Tech docs here:

 

https://atariage.com/forums/applications/core/interface/file/attachment.php?id=733216

 

Basically, you unlock the special registers by setting bit 7 of $D01D (i.e. POKE $D01D,$80), then poke the desired resolution into bits 4-6 of $D01B.

 

The U1MB plugin featured in this video handles everything for you in a safe manner, but unfortunately it's not yet finished (and thus not yet released):

 

 

Some stand-alone tool could perform the same job; I am not sure if anything exists yet. I've just ordered a Sophia 2 for myself so that I can maintain and devlop the plugin in my own time.

  • Like 4

Share this post


Link to post
Share on other sites
6 minutes ago, flashjazzcat said:

Some stand-alone tool could perform the same job; I am not sure if anything exists yet. I've just ordered a Sophia 2 for myself so that I can maintain and devlop the plugin in my own time.

 

See post #150 of this thread, Simius has made a little handy tool for setting up Sophia 2!

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
4 minutes ago, tf_hh said:

See post #150 of this thread, Simius has made a little handy tool for setting up Sophia 2!

Excellent - I should have realised. Thanks! :)

2 minutes ago, tf_hh said:

Just for the records... there´s a V.12 out 🙂

Um... I should have realised. :D

 

Excellent: revision info added. Exactly what I like to see.

Edited by flashjazzcat
  • Haha 1

Share this post


Link to post
Share on other sites
16 minutes ago, tf_hh said:

 

See post #150 of this thread, Simius has made a little handy tool for setting up Sophia 2!

That's it!  Got mine working after adjusting resolution.

 

So beautiful!  I feel like Ellie here:

 

  • Like 1

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...