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BBS-PC!.notes
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1989-06-23
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Due to numerous reports of problems with JR-Comm and BBS-PC! when doing
file transfers via ZMODEM I went and purchased an A500 system along with
a copy of this program so that I could do some testing and determine just
what was happening for myself.
The most important thing I discovered is that MSS is guilty of having
the audacity to release multiple revisions of this program without bumping
the displayed version number. In other words, although you may be running
the most recent *version* of BBS-PC!, namely version 4.20, you may *not*
be running the most recent *revision* of version 4.20.
Confusing? you betcha!
And it even gets worse. The revision of 4.20 that I purchased must have
been an exceptionally early one, in fact I was lucky that I did get one of
the buggy revisions since I was able to see for myself the ZMODEM download
problems that some people had reported. I hadn't seen them before because
the local BBS-PC! system that I was calling worked fine.
After some playing around I called Joe Rothman, the sysop of A.M.U.G.
BBS located in New York. Joe did some beta testing for MSS with BBS-PC!
He also supplied me with a copy of 4.20 that works correctly so that I could
test it.
What he also told me is that versions of BBS-PC! 4.20 that are not
219,044 bytes long have upwards of 15-20 different bugs, some that may
even destroy the file catalog after an upload. Although I haven't verified
this for the two different versions that I have, he does suggest that any
BBS-PC! sysop that has 4.20 with a filesize other than the most recent
size of 219,044 bytes should contact MSS immediately for an upgrade. He
also says that you should specify this particular filesize.
Hell of a way to handle different versions if you ask me...
----------------------------------------------------------------------
Anyways, here's a summary of the problems I've found with this thing.
All problems are related to version 4.20 of BBS-PC! with filesizes of
217,460 or 219,044 bytes.
- The 217,460 version has a bug with ZMODEM receive, all files are posted
as text. The 219,044 size version corrects this problem, what else is
corrected is unknown.
- YMODEM is not true YMODEM. It is actually XMODEM-1k since the file info
block is not sent. This is a common problem with several other BBS programs
too.
- YMODEM-batch is brain damaged. Only the first file in the batch is sent
with the file info block. The second file is sent without it, so it will
be received via XMODEM-1k. After the second file is received JR-Comm will
terminate the transfer.
- Although BBS-PC! supports baud rates up to 19.2k, it can't even handle
9600bps properly. All ZMODEM uploads at that speed caused a lockup, use
YMODEM in that case. ZMODEM downloads went fine though.
- An attempt to run BBS-PC! with an HST modem and a fixed baud rate was
somewhat successful, but it's useless since CTS/RTS handshake isn't
supported. So, any downloads when connected at baud rates less than the
fixed rate will cause data errors when using ZMODEM.
- There's probably other bugs lurking around that I didn't happen upon.
I wasn't about to waste anymore time on this thing...
----------------------------------------------------------------------
Although I had changed the YMODEM protocol in JR-Comm 0.93 in an effort
to accomodate BBS-PC!, I've since realized that this isn't a "good thing".
As a result, the protocol is the same as in previous versions of JR-Comm.
Any further info on strange goings on would be appreciated, but no
promises about fixes or work arounds. I'm referencing my protocols to the
DSZ transfer module that the IBM world uses. Everything in JR-Comm works
as expected with that thing and it was written by the author of YMODEM and
ZMODEM, Chuck Forsberg.
'nuff said... ok?