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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!munnari.oz.au!spool.mu.edu!agate!usenet.ins.cwru.edu!gatech!rpi!usc!cs.utexas.edu!convex!constellation!a.cs.okstate.edu!jmccorm
- From: jmccorm@a.cs.okstate.edu (MCCORMICK JOSHUA C)
- Subject: Re: Boy, do *I* have a question!
- References: <oZwTwB2w164w@jaflrn.UUCP>
- Message-ID: <1993Jan4.201309.3989@a.cs.okstate.edu>
- Organization: Oklahoma State University
- Date: Mon, 4 Jan 93 20:13:09 GMT
- Lines: 34
-
- From article <oZwTwB2w164w@jaflrn.UUCP>, by Don Becker <grendel@jaflrn.UUCP>:
- > I own an AT&T PC6300 (ARGH!!!), an 8086-based system that isn't totally
- > compatible with the IBM XT, but is close enough to run most XT-related
- > programs. I doubt I can run 14.4, but I've heard (from somewhat unreliable
- > sources, but sources nonetheless) that some 9600's can run on XT's.
- >
- > If anyone can point me towards a 9600 baud modem that will work with my
- > so-called computer (ie: brand, price, and where I can get one), please send
- > me e-mail, as I don't read this group at all.
-
- Generally speaking, if one 9600 baud modem is going to work with your 8086,
- all are going to work. But there is something you can do to at least minimize
- the potential problems. If you get an internal modem, make sure it has a
- 16550 chip on it. If you get an external modem, have your communications
- card fitted with a 16550. But, not all communication cards can be upgraded.
- Make sure that it has a 16450 chip that is *socketed*. It so, you're in
- business. If not, you'll need to go out and buy another communications card
- that you can upgrade.
-
- Next, be sure that your telecommunications software will take advantage of
- the 16550 chip. I know telemate does, others do as well. The 16550 chip
- basically buffers the information inside the chip so that if your computer
- was too busy in between interrupts to pick up every byte of data as it
- comes it, it'll hold up to 16 characters worth until your computer catches
- up.
-
- Unfortunately, you'll find that talking to your modem at 9600 may not be
- what you want to do. Unless you disable v.42bis (data compression) you'll
- find that you'll want to talk to your modem at a minimum of 19.2k, if not
- 38.4. I lock mine at 38.4k, and sometimes it can't keep up with a modem I
- regularly talk to, locked at 57.6.
-
- Some things to think about... Josh
-
-