🚀 go-pugleaf

I'm trying to run _any_ hc11 microcontroller downloader under
dosemu, without much luck.  Ideally, I'd like to run 
motorola's pcbug11 under dosemu, but when I try, the program
sends a few characters out the port and hangs.  Other downloaders
(at different baud rates) also hang.  I can kill the dosemu attempt
from another terminal and try again, but was hoping that somebody
with more dosemu experience might have some ideas.  (or know
of any hc11 downloaders that work under linux!)...

Even plain old dos terminal programs hang...

My dosemu.conf has a serial line as follows:

serial { com 1 base 0x03f8 irq 4 device /dev/cua0 }

It's an older kernel (2.0.29) with dosemu 66.7.  
Any ideas?

John Murphy