Date   : Thu, 03 Nov 1983 10:33:00 MST (Thu)
From   : Keith Petersen <W8SDZ@simtel20>
Subject: MDM712 printer and terminal problems

The ^P in the terminal mode SHOULD work correctly IF you have LISTSTAT
implemented correctly in your CBIOS.  This is the new CP/M 2.2 vector
in the CBIOS jump table that tests to see if the printer is ready.
MDM712 relies on this routine to prevent loss of characters.  MDM712
should issue an X-OFF (^S) to the mainframe when the 16k printer
buffer is full and then it should gather up to 128 ADDITIONAL
characters in an auxilary overflow buffer while waiting for the
mainframe to honor the X-OFF request.  This feature has been in MDM7xx
for a number of versions and there have been no problems reported.

Your problem with the terminal mode not allowing use with
screen-oriented text editors is caused by an option in the user
overlay not being set correctly.  The distributed overlays all have a
"filter control characters while in terminal mode" option TURNED ON.
You must re-assemble your overlay with a NO there instead of a YES.
--Keith