Anyone know this chip?

[Jeremy Brookes]

> The M110 would have been made by SGS, but although I have
> databooks with the M108 and M112, I've never managed to find
> any M110 data, which suggests a relatively short production.
> However, I have repaired a couple of SX1000s, so I have a
> rough idea what the M110 does.
>
> It is essentially a keyboard scanner and DCO divider.  It was
> used in the SX1000 and possibly in some Siel synths
> (the Mono?).  Your Jen schematics should tell you most of
> what you need to know.

I pretty much figured it was doing this.

> Do you have any plans to scan in the Jen schematics and
> put them on a website?

I've got them scanned though they appear incomplete. It's four pages from a
larger one and the edges don't seem to line up (e.g. the filter input is
shown as a resistor to ground in one page but as being fed from the VCO in
another!). I might put them up quickly and then try and redraw them to make
them clearer at a later date. It appears to be missing the circuit for the
ADSR controlling the VCA though the ADSR to control the VCF is present.

I'll post the list when I put them on my web site.