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- Path: sparky!uunet!uunet.ca!xenitec!zswamp!geoff
- From: geoff@zswamp.UUCP (Geoffrey Welsh)
- Newsgroups: comp.dcom.modems
- Subject: Re: Adding a serial port for 16550 chip
- Message-ID: <9PPwVB4w165w@zswamp.UUCP>
- Date: Wed, 16 Dec 92 22:18:55 EST
- References: <1992Dec14.150618.28311@dartvax.dartmouth.edu>
- Organization: Izot's Swamp
- Lines: 24
-
- 12100z@d1.dartmouth.edu (Tom Buskey) writes:
-
- > I've got a machine with 16450 UARTs and I'd like to replace one of them
- > with a 16550. The board has the serial port chips integrated w/ the
- > rest of the system so the UARTs are not only non-socketed, they're
- > integrated in a chip w/ several other funtions. The machine is a
- > Gateway 2000 w/ a micronics local board MB. The bios will let me change
- > the standard ports to com3 & com4, change thier interupts, addresses, or
- > disable them altogether.
-
- You're best off to install serial card with 16550s and disable the serial
- ports on the integrated chip by hardware means (using jumpers, switches, or
- whatever), if you can find the docs. Disabling the ports in the BIOS will
- probably not have a lot of effect, since most software bypasses the BIOS and
- accesses the port directly. Accessing the new ports as COM3 and COM4 may not
- work well, or perhaps not at all, because the odd comm ports use the same
- interrupt (IRQ4) and the even ones, IRQ3.
-
- Geoffrey Welsh, 7 Strath Humber Court, Islington, Ontario, M9A 4C8 Canada
- geoff@zswamp.uucp, [xenitec.on.ca|m2xenix.psg.com]!zswamp!geoff (416)258-8467
- Now I've lost everything, I give to you my soul
- And the meaning of all that I believed before escapes me
- In this world of none, no thing, and no one
- - Genesis, _Afterglow_
-