Busted Micro Switch keyboard -- need help with PCB

[Nevets01]

So I got this parallel ASCII keyboard with a couple S-100 boards at a garage sale (this is why it's in the S-100 section), but the problem, as you can see, is the busted PCB. Seriously, did someone take a machete to this thing?
Model number on the board is "SDR SD-16396"
Anyway, there's a chunk, completely missing from the side. I can't repair the traces; because there are no traces. Does anyone have images or schematics of the PCB of an intact version, which I can replicate with bodge-wires?
Thanks

EDIT: first uploaded pictures didn't work. Trying again.


Worked that time : )

 

[Al Kossow]

what a horrible thing to do. they took a hacksaw to the control and keypad sides of the pcb, taking a chunk of one of the matrix decoding ICs with it
with a lot of tracing you should be able to reconstruct the x/y matrix layout of the full keyboard, but by then you would be better off just unsoldering
all of the switches and resusing the switches and keycaps on a new pcb, since you are missing all of the keycaps on the left and right sides.

I would only consider doing all of this work because microswitch kbds are very high quality and you have at least a dozen spare keyswitches on either
side.

 

[Nevets01]

Yeah, if I can find another PCB layout for a parallel keyboard that uses the same chips (or things I have on hand), making my own PCB with the original switches is definitely an option. Though I'd much rather have it in the original hardware, with that metal plate thing that holds all the switches in, if I can manage to repair the traces.
Also, that chip is actually intact, by the skin of its teeth. There's like one pin that's just hanging over the side. I did meet the previous (and original) owner, and I got the feeling that it was broken out of negligence, rather than ignorance or malice. Still, the deed is done.

 

[Chuck(G)]

Look at the vandalism done on Model M keyboards (e.g. Is it really indestructible?).

I'm with Al on this one--scavenge the switches and use a new PCB. Thanks to modern technology, a keyboard decoder is easy with a microcontroller.