Date   : Sun, 25 Dec 1983 19:53:16 EST
From   : Keith Petersen <w8sdz@brl>
Subject: MDM7xx overlay for DEC CP/M-80 machines

Bernie Eiben has given us a new overlay for MDM7xx for 3 different DEC
machines that run CP/M-80.  It was announced earlier as a part of the
MDM7xx package available from SIMTEL20 in the MICRO:<CPM.MODEM7>
directory as M7VT-2.ASM, but I felt that additional information might be
of use to Info-Cpm readers.  Here's an excerpt from the message he sent
to me telling what he did.

---forwarded message---

From: B.Eiben LCG Ext 617-467-4431 <EIBEN at DEC-MARLBORO>
To: w8sdz at BRL
Subject: MODEM 714

Keith, I modified the VT180 overlay to be "general" in serving VT180 /
Rainbow / DECmate II , the three DEC-micro's currently able to run CP/M
and to "talk" to the outside world.  This overlay supersedes the M7VT-1
one - we have currently three BIOS-versions out in the field - and above
overlay would have necessitated heavy DDTing.  I re-defined EXTCHR to be
closer to KERMIT and redefined IGNORCTL to be able to run HOST-programs
which require Cursor-Control.