Random Mechanical Keyboard

[hazardouschurch]

So i was at the thrift store and found these beauty's last touched in 1987 if the tags are accurate. I have been searching to try and find a model number i have honestly no idea what it is. The switches are cherry switches cherry black?. They both are missing the case and are a non-standard layout . The modifier keys are weird. The chips on the board are decoders/demultiplexers so they are jellybean parts. I am going to try to hook this up to an arduino and see if i can get it to work. If not i will use the vintage switches in a new keyboard that i can make they only cost me 2$ anyways.

 

Pics in spoiler

 

Spoiler

Part numbers for the ic's sn74ls156n for the first 2 left to right one is Texas instruments and the other is Motorola. The 3rd is mc14051b and the 4th is lm339n

 

They all run off of 5 volts so I'm going to try to poke around and see if i can figure it out.

 

Spoiler

[alexhelvetica]

$2 per keyboard and they have been at that OP Shop since the 80's?

[hazardouschurch]

It was one 1$ each a 50% off day lol

[alexhelvetica]

1 minute ago, hazardouschurch said:

It was one 1$ each a 50% off day lol

Can you post full pictures of each keyboard?

[hazardouschurch]

Sorry my camera is bad best one i have is my phone.

[hazardouschurch]

Key caps are  the dual molded ones

[hazardouschurch]

So I figured out the wiring by tracing it out  so I know which pins are power etc. It looks to all be 5 volt which is nice. Just need life to let up to hook it all together and figure out what it is saying.