SGI Indigo Keyboard and mouse adapter

[megaimg]

Hello guys, need your help... I just finish repairing a Indigo PSU and I think the unit is operational.....R3000 with basic video card....but I dont have HD, keyboard and mice.....I am looking for the adapter to use a ps/2 combination.,...waiting for a dim-8 to db9 to verify console....

Any recommendation!

 

[Elf]

Unfortunately I don't believe there are any options currently on the market. The two choices were the Drakware adapter and this older PIC based adapter that occasionally appeared on eBay (but is no longer listed).

I would either endeavor to find a used version of one of those -- which will be difficult -- or to find an original Indigo (or earlier) keyboard and mouse, which might be slightly easier to locate but still not very readily available, and much more expensive.

 

[megaimg]

If they are not going to make this adapter anymore, they must share the project with the community so we can build our own!

 

[Elf]

The schematics and firmware for the older two PIC version are actually still available: https://web.archive.org/web/20120415042231/http://www.irisindigo.com/index.php/Indigo_to_PS-2_Keyboard_converter

The form factor on that page is the original, prior to it being produced in a slimmer version, but using the same design as far as I know, by another eBay seller.

 

[megaimg]

So I started working on the PCB for this but have couple of Questions.....I am not a expert but!
1. I have replace the oscillator for Mouser - https://www.mouser.com/ProductDetail/Wurth-Elektronik/831017735?qs=2WXlatMagcEJrjb6y4CAdA== - Maybe someone can tell me if it will work
2. I guess I can combine or connect the v5 RAIL together?
3. Same with the GND Rails?

Example of the progress:

 

[Elf]

Regarding the schematics, whenever you see a 5V or GND connection (or any other commonly named stub connection), anything with the same label is generally considered to be interconnected.

Your choice of oscillator seems to match up with the original design, just being a TTL/CMOS 10 MHz clock source.

One piece of advice especially since the board has a lot of space on it currently: I would try to place all components on one side. Doing so will ease assembly or open up more assembly options. It's harder to reflow boards that have surface mount components on both sides, for example.

 

[megaimg]

Regarding the schematics, whenever you see a 5V or GND connection (or any other commonly named stub connection), anything with the same label is generally considered to be interconnected.

Your choice of oscillator seems to match up with the original design, just being a TTL/CMOS 10 MHz clock source.

One piece of advice especially since the board has a lot of space on it currently: I would try to place all components on one side. Doing so will ease assembly or open up more assembly options. It's harder to reflow boards that have surface mount components on both sides, for example.

Thanks, finish the redesign....

 

[megaimg]

Update on the project...first build, but still waiting for one part for testing....but looking good!