Date   : Mon, 17 Sep 1984 07:43:00 MDT (Mon)
From   : Keith Petersen <W8SDZ@Simtel20.ARPA>
Subject: New version of MODEM for TOPS-20

Frank Wancho has released a new version of MODEM (302) for TOPS-20.
It is now available from SIMTEL20:

Filename                       Type     Bytes   CRC

Directory MICRO:<CPM.TOPS-20>
MODEM.EXE.302                  ASCII    20480  825FH
MODEM.MAC.302                  ASCII    48121  5A5BH

This version has ALL of the timeout and error recovery features of
MDM730 as modified by PAT730V8.

There are 27 changes detailed at the front of the source file.  All
previously known bugs are fixed in this version.  One new bug has been
introduced and remains to be found and fixed: in batch receive mode
(with respect to the mainframe end), the first sector of each file
transfered is NAK'd.  This does NOT occur in single-file receive mode
and thus remains a mystery.  Frank considered this minor and decided
not to hold up this release until he found it.

A reminder for TAC users: unless your TAC port's input buffer has been
set to 134 characters instead of the default 64, there is no hope of
ever being able to upload at speeds higher than 300 bps.  If you don't
know the setting of your port, check with your TAC Liaison as listed
by the NIC WHOIS program for TACname-TAC.

Also, it is strongly recommended that you give your TAC the following
three commands before attempting to open a connection:

@D C A
@F O E
@F I E

Since it appears that it is possible to have flow control exerted by
the TAC even while in binary mode, you must shut that feature off to
have any hope of transferring files at any speed.  (You must do this
sequence even if you are starting a new connection with your TAC as
the person(s) before your may have left either or both of those
features on.  They are NOT reset by an @R or @L or hangup.)

Bug reports and whatnot concerning this new version of MODEM to
WANCHO@SIMTEL20.

--Keith