[comp.sys.ibm.pc.hardware] AST Premium 286 serial port troubles

djo7613@milton.u.washington.edu (Dick O'Connor) (02/14/91)

We have two AST Premium 286 machines (one a more recent vintage "Work-
station" model, the other the old large boat-anchor model) that are
having trouble keeping up with serial port communications at 9600 baud.
Has anyone had to deal with this before?
 
We direct-connect to a line multiplexor without a modem, and have tried
ProComm and MS-Kermit alike.  Symptom is that after about a screen of display,
the leftmost characters get "eaten".  Sometimes the number eaten is 
predictable, usually it's just a hash.  Feels like either a buffer overflow
somewhere, or (related to that) the AST's can't send XOFF when their 
mouths are full, so to speak.
 
I can plop a Kaypro XT next to one of these boxes and use the same 
serial line, monitor, power source and software, and the Kaypro doesn't
lose anything.  Neither do high-speed 386 boxes, or any of our other 286s.
AST should get back to me "soon" on this, but I wondered if anyone in
netland has seen/solved this.  Yes, our distributor DID fold, in fact!  :)

"Moby" Dick O'Connor                         djo7613@u.washington.edu 
Washington Department of Fisheries           *I brake for salmonids*