The control says OSP500L-G. Guy I bought it from said it’s a 1986 LB12. It definitely has the green monochromatic screen. I haven’t found any graphics or trace. The machine is new to me. I’d really like to get the serial Read working. Any help is much appreciated.

I’m using an Ausys DNC PRO. If there’s another working combo I’m willing to change my setup. I am able to Punch to the DNC Pro just fine. With all sorts of different settings.