Atari 800 side I/O plate

The Atari 800 is my favorite of the 8-bit computers but they are more useful with modifications. Incognito and Sophia 2 are perhaps the best two currently. Both require additional controls like a DVI port or a button to change the selected disk image. Sometimes people cut holes in their vintage computers to add these additional controls but if you can remove a panel and store it away and instead use a printed part for the time your mods are installed then

• you don't damage your vintage computer
• you can use different mods in future that might require different controls
• you won't be wishing you could un-drill a hole that is no longer required

This is a reproduction of the original side plate and it fits well. It looks ugly in recycled green PETG but that's just to check the fit.

The side plate for Sophia 2 is printed in a very 70s looking dark brown filament. I have made versions with DVI (the original Sophia 2 board) and HDMI/audio/button. The daughter board snaps into the side plate allowing installation without any glue. Of course you still need to move some capacitors and a ferrite bead to make room as with any other installation. Print with organic supports with the PCB cradle parallel with the build plate.

To remove the original plate from the Atari 800 the white plastic pins need to be snipped off. Then either the original plate or one you made can be fitted in place with two short M3 bolts and nylock nuts. 

You can grab this STL and mod it. There are 4 versions here now; original side plate, with DVI, with HDMI/audio, or with an extra DIN-sized hole for VBXE use.

If you want the HDMI printed circuit board, the KiCad project and gerbers can be found in my repo on github or as a PCBWay Project. No special options are needed and having boards made is cheap, it's only the shipping that costs real money. If you need someone to make it for you and you are in Australia I may be able to help but if not find someone local - it costs far too much to send internationally.