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- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Path: sparky!uunet!darwin.sura.net!blaze.cs.jhu.edu!newton.cs.jhu.edu!silano
- From: silano@newton.cs.jhu.edu (Mike Silano)
- Subject: DV/X and NCSA Telnet WORKS!
- Message-ID: <1992Jul23.175757.1607@blaze.cs.jhu.edu>
- Sender: news@blaze.cs.jhu.edu (Usenet news system)
- Organization: Johns Hopkins Computer Science Department, Baltimore, MD
- X-Newsreader: Tin 1.1 PL4
- Date: Thu, 23 Jul 1992 17:57:57 GMT
- Lines: 27
-
- My company just received DV/X last week. A few problems here and
- there, but overall, very stable. One problem though was that
- none of my TCP/IP software would run. This is the same problem I have
- seen using any telnet program and a task swapper.
-
- The reasons for this are clear - when the task is swapped out,
- the ISR(Interrupt Service Routine) is swapped as well. All I/O
- with the packet drivers is interrupt driven. Hence, the task is
- swapped and the machine goes boom.. (Please correct me if I'm off
- on this...)
-
- The solution to this is pktmux - the packet driver multiplexor.
- I FTP'd this from omnigate.clakrson.edu, in the
- /pub/gw/pktmux directory. There were no docs. Apparently, pktmux
- implements a protocol stack or at least a buffer around the
- drivers. Bottom line - CUTCP/NCSA telnet works from DV/X.
-
- One note - NCSA, ver 2.3.05 (the latest, I think) fails to properly
- reset the multiplexed packet driver. After exiting NCSA, the command
- pktdrv <int num> /r must be used to reset the driver.
-
- Enjoy.
-
- -Mike Silano
-
-
- Replies, comments, flames, or other to silano@cs.jhu.edu.
-