Model M 1390131 Found w/ Speaker

y11971alex · 27 Jul 2016, 23:10

So, I received my 1390131 today, and I found a speaker on the rear case. It doesn't make any noise when I type, though.

seebart · 27 Jul 2016, 23:13

Some pics would be nice.

DT wiki:

Virtually all Enhanced Keyboards have a small speaker grille on their bottom surfaces; however, only a few variants actually include a speaker (the keyboards of the RS/6000 workstations being the primary example).

wiki/IBM_Enhanced_Keyboard

y11971alex · 27 Jul 2016, 23:22

seebart wrote: Some pics would be nice.

DT wiki:

Virtually all Enhanced Keyboards have a small speaker grille on their bottom surfaces; however, only a few variants actually include a speaker (the keyboards of the RS/6000 workstations being the primary example).
wiki/IBM_Enhanced_Keyboard

Yes, I found a speaker, not just the speaker grille.

seebart · 27 Jul 2016, 23:23

I understand you, that's why the pictures would be nice!

They do not show up that often.

webwit · 27 Jul 2016, 23:40

My IBM Soft Touch as well. Greasy thing.

seebart · 27 Jul 2016, 23:44

Ah yes thanks webwit.

y11971alex · 27 Jul 2016, 23:58

webwit wrote: My IBM Soft Touch as well. Greasy thing.

Does it make noises?

rootwyrm · 28 Jul 2016, 00:32

No, it doesn't and won't. The RS/6000's have additional wired pins on the PS/2 port specifically for the speaker. Doesn't affect regular PCs at all.

Edit: so if you want to MAKE it work, here's what you need to do.
Connect PS/2 pin 2 (SDL F) to SPKR SIGNAL, and PS/2 pin 6 (SDL A) to SPKR GND on the motherboard. Do NOT attempt to use a normal PS/2 connector on your system as a pass-through as those pins are RESERVED in the ATX standard. You can wire basically direct to virtually any motherboard and it'll work.