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- Newsgroups: comp.os.mach
- Path: sparky!uunet!noc.near.net!chpc.chpc.org!ralf
- From: ralf@chpc.org (Ralph Valentino)
- Subject: 16550's
- Message-ID: <1992Dec28.152533.25758@chpc.org>
- Organization: Center For High Performance Computing
- Date: Mon, 28 Dec 1992 15:25:33 GMT
- Lines: 22
-
- I just upgraded my pc's serial card to 16550A's and I've been having
- problems with Mach (mk77 ux37). Mouse access from them seem fine, but
- if I send any character to a serial port via getty, kermit, or even
- cat, the system locks up tight - so tight it won't even enter the
- debugger.
-
- If I disable the fifo right after I test if it's there, (in
- mk/kernel/i386at/com.c) then everything works fine, but of course this
- defeats the whole purpose of the upgrade.
-
- Has anyone run into a similar problem or have any suggestions as to
- how I can track this down?
-
- -Ralph
-
- ps: I tested the fifo capabilities with OS/2 and 2.6MSD; it seems to
- work fine.
-
- ===============
- Ralph Valentino (ralf@chpc.org) (ralf@wpi.wpi.edu)
- Hardware Engineer, Worcester Polytechnic Institute
- Center for High Performance Computing, Marlborough MA
-