Purpose of purposefully omitted component on IIsi board?

[jessenator]

Anyone know what this (oscillator?) does-- located at 1B-1C marked Y2 rated/printed 32.768KHz on the IIsi motherboard? in the top (of this image) at the corner of the ROM SIMM and RAM bank?

I'm assuming it's not integral, but I'm curious.

 

[cruff]

Looks like it could be an alternate form factor if Y1 isn't available, Y2 would be populated?

 

[jessenator]

Hmm. Y1 looks like a capacitor. Is it?

 

[AwkwardPotato]

Capacitors have reference designators starting with C, and crystals have reference designators starting with Y.

 

[jessenator]

Good to know. Thanks!

 

 

[Bolle]

Looks like it could be an alternate form factor if Y1 isn't available, Y2 would be populated?

This.

That crystal is used as a timing source for the RTC.

SE/30 boards have those two alternate pads for the sound chip crystal. I have one that had a bad oscillator and replaced it with a SMD part on the normally unused pads instead of the through hole component that’s on there from the factory.

 

[jessenator]

Thanks!