*** Documentation for LOOPBACK ***

Copyright (C) 1992 by MarshallSoft Computing, Inc.

LOOPBACK is a utility program that will perform a UART loopback test. LOOPBACK
will also report the presense of a INS16550 UART if present. Run LOOPBACK if
you suspect that one of your UARTs is defective.

Two test are run. In the first test, a character written to the output port
should appear on the input port. In the second test, outputs to CTS ( clear
to send ) and DSR ( data set ready ) should appear on RTS ( request to send )
and DTR ( data terminal ready ).

LOOPBACK is distributed as shareware. If you find that you can use LOOPBACK,
a contribution of $5.00 would be appreciated.

*** Other MarshallSoft Computing Shareware ***

A shareware disk containing all MarshallSoft programs ( described below ) is
available for US $7.50 ( $10 outside of the USA ). A 360 KB disk is provided
unless a 720KB disk is specified.

MarshallSoft Computing, Inc.
Post Office Box 4543
Huntsville AL 35815

MarshallSoft can also be contacted at (205) 881-4630 from 5PM to 8PM CST.

*** Serial File Copy (SFC) ***

The Serial File Copy program SFC is designed to allow the transfer of disk
files ( including entire directories which may themselves contain directories )
between any two IBM PC compatible computers using standard RS232 serial ports.
The SFC program is particularly useful in copying files between IBM PC
compatibles with 5.25" disks and those with 3.5" disks such as the IBM PS/2 and
the various IBM PC compatible laptops. The computers must both be IBM PC
compatible ( this includes the TANDY 1000 ) with 256 KB or more of RAM. SFC is
also an easy way to backup a hard disk onto the hard disk of another computer.

Both computers ( between which you want to transfer files ) must have RS232
serial ports configured for use with a modem. COM1, COM2, COM3 or COM4 may be
used. Baud rate of 1200, 2400, 4800, 9600, 19200, 38400, or 115200 may be
selected.

Registration for SFC is $25 postpaid plus $3 S&H ( $6 outside of the USA,
Canada, and Mexico), and includes printed documentation & a version of SFC
without the shareware screen.

*** Personal Communications Library for C ( PCL4C ) ***

The Personal Communications Library for the C Language ( PCL4C ) is an
asynchronous communications library designed for experienced software
developers programming in C. Four compilers are supported: Microsoft
Optimizing C, Microsoft Quick C, Borland Turbo C, and MIX Power C. An IBM
PC/XT/AT or compatible is required.

The PCL features SMALL, COMPACT, MEDIUM & LARGE memory models, 29 communication
and support functions, interrupt driven receiver, support for 300 through
115200 baud, support for COM1 through COM4, adjustable receive queues from 8
bytes to 16 KB, control-BREAK error exit, 12 communication error conditions
trapped, ability to run 2 ports concurrently, complete modem control & status,
and 6 example programs ( including a terminal emlator with XMODEM & YMODEM ).

Registration for PCL4C is $45 postpaid plus $3 S&H ($6 outside of the USA,
Canada, and Mexico), and includes printed documentation, libraries without
the shareware screen, and source code for the library.

*** Personal Communications Library for Pascal ( PCL4P ) ***

The Personal Communications Library for Pascal ( PCL4P ) is an asynchronous
communications library designed for experienced software developers programming
in Turbo Pascal ( version 4.0 and up). An IBM PC/XT/AT or compatible is
required.

The PCL4P features 16 communications and support functions, interrupt driven
receiver, support for 300 baud to 115200 baud, support for COM1 through COM4,
adjustable receive queues from 8 bytes to 16 KB, control-BREAK error exit, 12
comm error conditions trapped, ability to run 2 ports concurrently, complete
modem control & status.

A simple terminal emulator program TERM.PAS (featuring XMODEM & YMODEM file
transfer) is provided in source code form as an example of the use of PCL4P
functions. Several other example programs are also provided.

Registration for PCL4P is $45 postpaid plus $3 S&H ($6 outside of the
USA, Canada, an Mexico) and includes printed documentation, a library without
the shareware screen, and source code for the library.