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- Path: sparky!uunet!europa.asd.contel.com!gatech!prism!comlab.gatech.edu!bob
- From: bob@comlab.gatech.edu
- Newsgroups: comp.dcom.lans.misc
- Subject: Serial NDIS driver available
- Message-ID: <68029@hydra.gatech.EDU>
- Date: 11 Sep 92 19:38:45 GMT
- Sender: news@prism.gatech.EDU
- Reply-To: bob@comlab.gatech.edu ()
- Organization: Georgia Institute of Technology
- Lines: 189
-
- A few days ago I mentioned that I recently saw an announcement from a
- company selling an NDIS driver for use over serial lines. Several people
- asked me to post the information so here goes.
-
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-
- ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
- 3 Introduction to NIC Bridge/Async 3
- 3 from Eighth Layer Systems 3
- @DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY
-
- Thank you for expressing your interest in NIC Bridge/Async. The
- following is an introduction to the capabilities and features of NIC Bridge
- and its companion product NIC Async.
-
- The "engine" of NIC Async is a DOS or OS/2 device driver. This driver
- acts as if it controls an Ethernet or Token Ring network card and meets the
- NDIS version 2.01 specifications. Rather than controlling a network card,
- however, NIC Async controls a serial port or modem.
-
- By combining NIC Async drivers with NDIS protocols, such as 3Com NBP or
- Microsoft/IBM NetBEUI, these protocols can be used from remote sites to provide
- remote access to Microsoft Lan Manager or IBM Lan Server systems.
-
- NIC Async can be used with any NDIS protocol which can be tuned for low
- speed operation. Tuning information is provided for use of Microsoft/IBM NetBEUI
- at any speed from 300 to 115,200 baud. Tuning information is also provided for
- use of 3Com NBP at any speed from 2400 to 115,200 baud.
-
- The diagram below shows an example configuration for NIC Async. This
- configuration allows a remote DOS workstation to access an IBM Lan Server or
- Microsoft Lan Manager server via the NetBEUI protocol. Multiple protocol and
- multiple port configurations, while not shown, are also available.
-
- ZDDDDDDDDDDDDDDDDD? ZDDDDDDDDDDDDDDDDD?
- 3 DOS Workstation 3 3 OS/2 Server 3
- 3 Software 3 3 Software 3
- @DDDDDDDDDDDDDDDDDY @DDDDDDDDDDDDDDDDDY
- 3 3
- ZDDDDDDDDDDD? ZDDDDDDDDDDD?
- 3 NetBEUI 3 3 NetBEUI 3
- @DDDDDDDDDDDY @DDDDDDDDDDDY
- 3 3
- ZDDDDDDDDDDD? ZDDDDDDDDDDD?
- 3 NIC Async 3 3 NIC Async 3
- @DDDDDDDDDDDY @DDDDDDDDDDDY
- 3 3
- ZDDDDDDDDDDD? Fixed or Dialup Link ZDDDDDDDDDDD?
- 3 Modem 3DDDDDDDDDDD/ /DDDDDDDDDD3 Modem 3
- @DDDDDDDDDDDY @DDDDDDDDDDDY
-
- NIC Async drivers are available for DOS and OS/2 PCs. These drivers
- offer many features to provide maximum speed. Highly optimized drivers are
- provided which take maximum advantage of the 32 bit instruction set of 386 and
- 486 CPUs. The OS/2 drivers offer two serial port access modes: a high speed
- "Direct Port" mode for IBM AT type serial ports as well as an "OS/2 File System"
- mode for any serial port with an OS/2 driver.
-
- NIC Async also takes full advantage of high speed 16550 "FIFO" serial
- port chips. These chips, when used with NIC Async, greatly reduce or eliminate
- serial port "overrun" errors which plague modern serial communications. They
- allow NIC Async to provide speeds of 115,200 baud in most environments, while
- reducing CPU load by a factor of up to 16 at any baud rate. These high speed
- chips are standard on all IBM PS/2s and can be retrofitted anywhere that IBM PC
- 8250 type or IBM AT 16450 type chips are socketed. They cost less than $ 20.00
- and are highly recommended for use with NIC Async.
-
- NIC Async also provides optional compression, useful to 57,600 baud on
- 386 and 486 PCs. This has been observed to provide about 2:1 compression when
- copying real-life text files. Unlike MNP compression, NIC Async compression is
- intelligent and will only send compressed packets. It will not expand packets.
- Compression may be manually enabled or disabled while on-line.
-
- NIC Async provides optional DES encrypted password validation to ensure
- that only authorized persons have access to your network. For higher security
- requirements NIC Async provides optional full-time full-packet DES encryption.
- Due to the use of highly optimized 32 bit 386 and 486 specific code, this is
- useful at up to 57,600 baud. Once connected and validated, this feature may be
- manually enabled or disabled while on-line.
-
- The wide assortment of modems, modem command sets and response codes
- are a major source of difficulty when configuring communications software.
- NIC Async provides many features to reduce this difficulty to a minimum.
-
- The first of these features is embodied in the design of NIC Async.
- This design does not depend on returned modem responses and thus suffers none
- of the problems of software which depends on fixed "Hayes compatible" modem
- response codes. NIC Async also provides many configuration options which allow
- it to be tailored to your modems.
-
- All transmitted and received serial data, whether modem commands and
- responses or network data, may be viewed at any time with one simple command.
- In addition, history buffers are maintained which record all modem control
- signal changes and NIC Async connection state changes. These buffers may also
- be viewed at any time with a single command.
-
- The NIC Async DOS and OS/2 drivers are identical and symmetrical in
- design. Any IBM compatible PC, whether DOS or OS/2, standalone or networked,
- workstation or server may initiate a call to, or answer a call from, another
- NIC Async equipped PC. Alone, NIC Async may be installed on a PC to provide
- remote access to that PC, most commonly a server.
-
- When combined with NIC Bridge, NIC Async can provide remote access and
- remote bridging to virtually any device on a Token Ring or Ethernet network.
- Like NIC Async, NIC Bridge provides DOS and OS/2 drivers that are identical
- and symmetrical in design. Highly optimized 32 bit versions of these drivers
- are also provided for 386 and 486 CPUs.
-
- In Ethernet environments NIC Bridge provides MAC layer bridging and is
- thus protocol independent. In Token Ring environments NIC Bridge provides IBM
- Token Ring source routing. This requires the use of a special high speed NDIS
- driver, supplied with NIC Bridge, which allows use of the IBM Token Ring Adapter
- in source routing bridge mode.
-
- NIC Bridge acts as an NDIS protocol driver and can be linked to two or
- more NDIS network card drivers. An example configuration is shown below. Local
- Ethernet and Token Ring bridging, while not shown, is also available.
-
- ZDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
- 3 Dedicated DOS or 3
- 3 OS/2 Bridge PC 3
- @DDDDDDDDDDDDDDDDDDDDDDDDDDDDY
-
- ZDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
- 3 NIC Bridge Driver 3
- @DDDDDDDDDDDDDDDDDDDDDDDDDDDDY
- 3 3
- To Remote User ZDDDDDDDDDDD? ZDDDDDDDDDD?
- ZDDDDDDDDDDD? 3 NIC Async 3 3 Ethernet 3 Local Ethernet Network
- DDDD//D3 Modem 3DDDD3 Driver 3 3 Driver 3DDDDDDDD//DDDDDDDDDDDDD
- @DDDDDDDDDDDY @DDDDDDDDDDDY @DDDDDDDDDDY
-
-
- NIC Bridge provides custom protocol and address filtering. Filtering
- allows the reduction or elimination of bandwidth consuming broadcast packets.
- It can also be used to bar access to specified network protocols and devices
- for security or other reasons.
-
- In addition to the bridging functions, NIC Bridge may also be used
- for high speed packet generation, packet capture and statistics gathering.
- These features are invaluable for the analysis, tuning and trouble-shooting
- of NIC Async, NIC Bridge and other network hardware and software.
-
- Both NIC Async and NIC Bridge are being ported to the Novell ODI
- (Open Datalink Interface) and CRYNWR (formerly BYU Packet Driver) network
- driver interface specifications. The current NDIS basis for these products
- is due to the high performance, maturity and corporate acceptance of the
- NDIS driver specifications.
-
- Support for the following features are under development and/or
- consideration:
-
- - SLIP and PPP line protocols.
- - ISDN interfaces.
- - TCP/IP routing.
- - Token Ring MAC layer bridging.
- - Windows 386 enhanced mode virtual device drivers.
- - Windows NT drivers.
- - Windows and Windows NT user interfaces.
- - OS/2 Presentation Manager and Work Place Shell user interfaces.
-
- NIC Async and NIC Bridge are currently in the final stages of beta
- testing. They will be publicly available in September 1992. For further
- information please contact me via Compuserve ID 76236,1403, at 613-567-5366
- or at the following address:
-
- Michael Reid
- Eighth Layer Systems
- 200 Bay St., Suite 602
- Ottawa, Ontario
- Canada
- K1R 7W8
-
- All trademarks are the property of their owners. This includes, but is not
- limited to, the trademarks of 3Com, IBM, Microsoft, Novell, Hayes and CRYNWR.
- DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
-
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-
- As is always the case, I have no connection to this company. I don't intend
- on buying their product but I would be interested in hearing about the
- experiences of anyone that does.
-
- Bob
- --
- Bob Baggerman ! bob.baggerman@gtri.gatech.edu
- Communications Laboratory ! bob@comlab.gatech.edu
- Georgia Tech Research Institute ! qseclrb@prism.gatech.edu
- Atlanta, GA 30332 USA ! 404-894-3525
-