Thanks, James, that was it! Even though I've had this A-111 for about 13 years now, and bought it new, the jumper wasn't there. I added a jumper and now it reads the bus.

I took a look at my two (also 13-year-old) A-140s to see if there was a similar jumper, since those also aren't reading gates from my new A-164-1. There's a place at the upper-right corner of the circuit board marked INT.GATE and J1, but there are no pins there to hold a jumper on either module.

Very strangely, though -- strangely because I bought them both new in 1998 -- one of them has a solder blob on the back connecting the two points, and one of them doesn't. I would think the one with the solder bridge should read the bus, but it doesn't. It looks slightly blackened/burnt under the solder.

So, given this, any recommendations Should I try adding a solder bridge to the one that currently doesn't have one

Ernst

--- In Doepfer_a100@yahoogroups.com , James Husted <james.husted@...> wrote:
>

> Did you get the A-111 new If it was used, the prior uses may have removed the J1 jumper (upper rich corner of the PCB under the ribbon cable). This jumper has to be there for the A-111 to "see" the CV bus.
>