Correct, but in the pokeys/mach 3 settings I don't know how to classify the item labeled ARC coming out of the Proma THC. I'm not sure of the function so I don't know what to tell mach it does.

on page 30/31 is a good descripton:

In what manual? In the mach 3 page 30-31, according to PDF numbering, doesn't say anything. A-1 Has description, but seem cryptic to me.

I guess I need to ask, the ARC on the Proma THC, is it an output going to mach or an input from mach.

ARC on the PROMA is an output going to Mach's "Arc OK" Input.

In what manual? In the mach 3 page 30-31, according to PDF numbering, doesn't say anything. A-1 Has description, but seem cryptic to me.

I guess I need to ask, the ARC on the Proma THC, is it an output going to mach or an input from mach.

in the one i attached in my post

LOL oops, didn't see that. I'll look through that. Thanks. I have that manual too and saw that section, then I guess it just slipped my mind. I'm losing it!!!