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jessenator

Purpose of purposefully omitted component on IIsi board?

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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.

etNGtHV.jpg

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19 hours ago, cruff said:

 

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.

Edited by Bolle

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