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- Path: sparky!uunet!nwnexus!remote!UUCP
- From: Jim.Corbett@f35.n152.z1.fidonet.org (Jim Corbett)
- Newsgroups: comp.os.linux
- Subject: serial ports are broken in p4!
- Message-ID: <722576612.AA22420@remote.halcyon.com>
- Date: Mon, 23 Nov 1992 15:08:03 -0800
- Sender: UUCP@remote.halcyon.com
- Lines: 47
-
- > I believe it is pin 4, old cable was 2-3, 3-2, 4-4,
- > 6-20 and 7-7.
- > New cable is 2-3, 3-2 and 7-7 and works fine.
-
- > 4-4 sounds suspicious; I doubt that was right! A
- > "correct" null modem
- > cable would have done something like this:
-
- You are correct on the 4-4, that is what the label on the connector
- said, inside it was 5-5 that went straight thru.
-
- > What you probably saw happening is that after 0.98pl1,
- > Linux started
- > supporting hardware handshaking, which is one more
- > thing to get right.
-
- > particuliar serial port. (Note: not all stty's
- > support NOCRTSCTS; it is
- > a trivial patch to stty to get it to support the new
- > termio flag, though.)
-
- Would appreciate info on what to patch.
-
- > would be best to get a full cable and/or get your PC
- > to do hardware
- > handshaking correctly, since you need that if you want
- > to do high speed reliable transfers.
-
- This brings up another question;
- what LINUX source files need patching to allow higher than 38.4? I
- would like to go to 115.2 or at least 57.6 for my
- BUDGET kermit link to my BBS system.
-
- > Solving it the way you did, by getting a simple
- > calbe that doesn't try to do anything with the DTR/DSR
- > and CTS/RTS lines
- > works, as you saw, but at the cost of losing hardware
- > handshaking.
-
- Yes, it still gets a few packet errors when multitasking and writing
- buffers to disk. I wii try a full cable and see if those dissapear...
-
- Many thanks for your reply, I am sure you cleared up some of the
- confusion for me and some others.
-
- * Origin: Intermittent Connection, Eugene OR 503-344-9838 (1:152/35)
-
-