On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < cctalk@classiccmp.org> wrote:
> Josh wrote: > > https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg > > Would these potentially be the sense amp / comparators for the core? I > wonder if they were anything like: > > https://datasheetspdf.com/pdf-file/1092342/Motorola/MC1711L/1 > > which might have a similar application and take +15 and -7 on L > package pins 11 and 4 respectively with ground on pin 12. > > Being another Motorola design from what looks like a similar time > period, I wonder if there could be a similarity in pinouts by some > chance? > It's not an MC1711L based on that pinout. (But I suspect as you do that it's part of the sense amp for the core). In particular Pin 1 of the IC is connected to what I believe to be +15V. (It's also hard to tell what pin 1 is, since there's no orientation marker on these... ) Ground is pin 10. I suspect -15V is pin 7. - Josh
