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- Path: sparky!uunet!usc!nic.csu.net!nic.csu.net!nntp
- Newsgroups: comp.os.ms-windows.misc
- Subject: re: 16550 UARTs and Windows
- Message-ID: <1993Jan22.181206.3916@nic.csu.net>
- From: gibsonst@sonoma.edu (Stephen Gibson)
- Date: 22 Jan 93 18:12:03 PST
- Reply-To: gibsonst@sonoma.edu
- References: <1jpc8uINNctd@msuinfo.cl.msu.edu>
- Organization: Sonoma State University, Rohnert Park, CA
- Nntp-Posting-Host: ethernet.sonoma.edu
- Lines: 34
-
-
- In article <1jpc8uINNctd@msuinfo.cl.msu.edu> jhl@egr.msu.edu (John Lawitzke) writes:
- >I have a machine which uses 16550 UARTs. I am attempting to determine
- >how the FIFOs work with Windows. Primarily, I am attempting to
- >determine how Windows detects the presence of the 16550. I have
- >"COM1FIFO=On" set in my SYSTEM.INI file. However, the FIFOs do not
- >appear to be being utilized. How can I tell if they are being used?
- >
- >I tried:
- >
- >1) Bring up debug and turn on the FIFOs
- >2) Startup Windows
- >3) Use debug to check; the register indicates that FIFOs are off
- >4) Exit Windows
- >5) Use debug to check; the register indicates that FIFOs are on
- >
- >Is Windows virtualization getting in my way?
- >
- >--
- >John Lawitzke
- >Manager of Product Management
- >Dale Computer Corp.
- >Internet: jhl@frith.egr.msu.edu
-
- Probably. Windows' DOS sessions see the 16550 as an 8250A.
-
- By the way, the premiere issue of Windows Sources (Feb 1993) has a pretty
- good article on Windows, serial ports and UARTS (page 422)
-
- Stephen Gibson
- System Support Specialist
- Sonoma State Universtiy
- eMAIL: gibsonst@sonoma.edu
- Stephen.Gibson@sonoma.edu
-