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- Newsgroups: comp.os.linux
- Path: sparky!uunet!news.centerline.com!noc.near.net!goethe.credtech.com!arena
- From: arena@goethe.credtech.com (Mike Arena)
- Subject: Re: PC port I/O for Linux MS-DOS emulator (long)
- Message-ID: <1992Dec14.181549.27231@goethe.credtech.com>
- Keywords: emulator, msdos, ms-dos, port I/O, linux, 386bsd, pc
- Reply-To: arena@credtech.com (Mike Arena)
- Organization: Credit Technologies Inc.
- References: <77873@hydra.gatech.EDU>
- Date: Mon, 14 Dec 1992 18:15:49 GMT
- Lines: 37
-
- In article <77873@hydra.gatech.EDU> gt8134b@prism.gatech.EDU (Howlin' Bob) writes:
- >dear Those in the Know,
- >
- >A plea for help:
- >
- > I am currently modifying Linux's (pre-alpha) MS-DOS emulator to
- >support simulated port I/O; that is, if a program does an in
- >from I/O address 0x2f8, I'll hand it the next available character
- >on com2.
-
- ...
-
- > So I come to you, the public, in a plea for help. I desperately
- >need information on the 8250 UARTs (the 16550's seem to be 8250's with
- >one extra FIFO control register, correct?), the 8259 interrupt
- >controller, and the keyboard controller (number?). If you can't give
- >me information about the chips, at least point me to a useful reference.
- >I know I should probably get the Intel spec. sheets, but something about
- >programming PC's would be just as good.
-
- ...
-
- >Howlin' Bob
- >Georgia Institute of Technology, Atlanta Georgia, 30332
- >uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt8134b
- >Internet: gt8134b@prism.gatech.edu
-
- Look in Jeff Duntemann's articles in Dr. Dobb's Journal for most of 1991.
- I think the first issue was around March.
-
- He describes, in much detail, about interrupt-driven communication using
- UART's on the PC. His set of articles are much better than any book I've
- found which claimed to be "the bible" on PC communications.
- --
- Michael James Arena Credit Technologies Inc.
- arena@credtech.com 281 Winter Street, Suite #100
- (617) 890-2000 x237 Waltham, MA 02154
-