Null Modem Simulator
--------------------


General description
-------------------

This driver simulates pairs of serial ports interconnected by null-modem
cables.  It can be used for testing comm programs and network software, but
the primary motivation was to allow linking network software on an emulated
computer (e.g. Mac emulated by FUSION) to Amiga network software.

NOTE:  This is a true null-modem simulation, not a simulation of two modems
connected to each other as in nullmodem.device.

The ability to network in this fashion provides a number of benefits,
albeit not at blinding speeds:

1) Emulated and Amiga-native network software can share the same dialup
link.

2) Ethernet cards that don't work correctly under the emulation can be used
via the Amiga's network software.

3) Third-party serial cards that don't work correctly under the emulation
can be used via the Amiga's network sofware.

4) The native serial port can use Miami's built-in driver, which tends to
work better than serial.device or any of its replacements.

5) Incompatibilities between the emulation's Ethernet support and Open
Transport on an emulated Mac don't preclude using Open Transport on the
Amiga's Ethernet.


Features
--------

Sufficiently compatible with serial.device for most applications.

Fully NSD-compliant.

Supports up to 32768 simulated links.

Capable of transferring at high speeds when applications use large
IORequests.


System requirements
-------------------

Any Amiga.  The driver should be compatible with all CPUs and OS versions.
However, CPUs with caches require V36 (2.0) or later.


Files in this archive
---------------------

nullser.README		This file
nullser.doc		Documentation on installation and use
nullser.device		The driver itself
Hosts.bin		Sample host name file for the Mac


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---------------------------------------------------------
Copyright (C) 1999 Frederick H. G. Wright II <fw@well.com>
Intact archive freely distributable for noncommercial use.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  392     768  51.0% -lh5- fa57 Mar  5  1999 Hosts.bin
[generic]                 1509    2128  70.9% -lh5- e29a Mar  5  1999 nullser.device
[generic]                  952    1990  47.8% -lh5- ec77 Mar  5  1999 nullser.README
[generic]                 7853   18748  41.9% -lh5- bf6e Mar  6  1999 nullser.doc
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         4 files   10706   23634  45.3%            Mar 19  1999