w8sdz%brl@sri-unix.UUCP (12/29/83)
From: Keith Petersen <w8sdz@brl>
Bob Plouffe has just released MDM716, a major improvement in the
MDM7xx series of MODEM7 programs. It's now available on SIMTEL20
in the MICRO:<CPM.MODEM7> directory as:
MDM716.ASM - the source code (not normally needed, use .COM and overlay)
MDM716.AQM - same as above, but squeezed, stored in ITS-Binary format
MDM716.COM - stored in ITS-Binary format
MDM716.HEX - for people who cannot FTP .COM files
NOTE: When customizing the .COM file with your overlay, use the command
SAVE 69 MODEM7.COM after exiting DDT. This is because MDM716.COM
is larger than MDM712-713-714 for which the instructions were written.
Here's what's new in this, and a few previous versions:
----
12/27/83 1. Detection of first SOH is made less susceptible to
noise hits on the line and to extraneous characters sent
by a remote just prior to sending sector header. (such
MDM716 as when 'Q' option is not set at remote under 'BYE')
2. Permits operation with a remote computer using `BYE'
and any version of the CHRISTENSEN PROTOCOL without
the need to set the 'Q' option at remote when receiving
files FROM it (SENDING & RECEIVING WHEN BOTH ENDS ARE
CHANGED TO THIS CODE). Thus progress reporting
at both ends is possible. This works in both single
file and BATCH modes of operation.
3. At the receive file end, progress is shown only after
each sector is actually received rather than when it is
awaiting a sector. Thus, the sector count at the end of
receiving a file matches the actual sector count in the
file.
4. Adds back the feature previously deleted that allows
the operator the option of retry if the ERROR LIMIT is
reached. This is virtually essential on packet switched
Networks like ARPANET and others that can get throttled
by traffic and delay the sending of packets. Who needs
an automatic ABORT after receiving 1120 sectors out of
1250 when a retry would probably allow continuance?
5. Corrects the SENDFILE routines that caused some of the
problems that the above fixes now tolerate. File name
characters were actually sent twice. Once as found in the
FCB (in FCB format) and again in CP/M format - one after
the other, character-by-character including the '.' of the
CP/M format. Whoo boy, what a mess. Anyway the program
is now fixed not to do that and the receive-file changes
tolerate both the new and the old.
6. Provides noise and extraneous string protection to the
detection of 'ACK' and 'NAK'. RESENDS A SECTOR ONLY ON
RECEIPT OF A VALID NAK OR AFTER A TIMEOUT ERROR MSG.
7. Fixed T-MODE so that re-use of the command buffer
does not cause a problem. T-MODE now uses 128 bytes from
CMDBUF+2 so that buffer size is not wiped out.
8. Corrected MENU2 for the (V)iew option to show the
use of 'R' and/or 'S' to view Received and/or Sent bytes
at the console. This feature present since MODEM2 but
never correctly shown in the MODEM7 help screens.
9. Fixed buffer problem that caused batch mode to
fail unpredictably when sending a large number of files.
- Bob Plouffe
12/11/83 Expanded Hayes redial options. Eliminated scrolling
MDM715 of CRT display during redial. Added clue to abort CAL.
Eliminated duplicate 'CONNECT' msg on CRT (from Hayes).
Eliminated display of ALT LD access codes. Faster redial
for Hayes. Resets Hayes (ATZ) on BYE command. Finished
clean-up of comments missed by NEAT. Shortened 3 LTR
command help screen by one line. New NUMLIB ORG 0D00.
- Tom Bering
11/11/83 Releasing full source code, including all comments. Updated
MDM714 the telephone library for currently available RCPM systems.
LF not automatically added in "L" half duplex mode now. Can
be added via "TLF" command if needed. Renamed the overlays
to allow them to remain independent of further updates. Ex-
ample: M7AP-1.ASM, M7GP-1.ASM, M7PC-1.ASM, etc. Enjoy.
- Irv Hoff
--end--