NetNews Usenet Archive 1992 #19/NN_1992_19.iso/spool/comp/sys/apple2/19575

Text File | 1992-08-27 | 1.6 KB | 37 lines

Newsgroups: comp.sys.apple2
Path: sparky!uunet!wupost!zaphod.mps.ohio-state.edu!n8emr!bluemoon!t_captain
From: [e-mail] (Tc Wilson)
Subject: Modem port differnces in Rom1 and Rom3
Message-ID: <[e-mail]>
Sender: [e-mail] (BBS Login)
Organization: Blue Moon BBS ((614) 868-998[024])
Date: Tue, 25 Aug 92 23:19:01 EDT
Lines: 26


This question is basically aimed at David Lyons, but anyone who can help
is welcome to respond.

I've recently had to switch from using my Rom03 GS for my BBS to using my
Rom01 GS. I have a USR HST on it, and I've noticed that the Rom 01 handles
flow controlling (hard-ware wise) differently from the Rom03. Basicly,
what's happening is that the HST is dropping the CTS (handshake in) line,
and the Rom03 has no problem reading it; however, the Rom01 has a major
problem - I have to use a timing loop (1/30th of a second) to stop output
to let the modem catch up (otherwise Ymodem-4k and Zmodem dies). This
doesn't always work, however (2400/ARQ connects chunk out hard).

My question is this: what, if any, hardware differences are their in the
MODEM port between the Rom01 and Rom03? I'm not interested in going
through the firmware, since it gets in the way and can't succesfully
handle anything above 19200 without loosing throughput.

Or is this problem with my GS's modem port, and not between the two? It
just seems very odd, since everything else (port wise) works the same
between the two.


Tc Wilson/The Captain           "Programming is an art form
[e-mail]        that fights back."
.... or try: TCQ, The Captain's Quarters [phone], 300-38400 hst