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AT & OPTO DUAL RS422/485
SERIAL UTILITY DISK &
PROGRAMMING GUIDE
Introduction.
This describes the programs on the Serial Utility Disk
supplied with all our serial cards.
The ADDRCOM3/4 programs are usually used in the
AUTOEXEC.BAT file to automatically set the BIOS addresses
for COM3 and COM4 ports every time the PC is powered on in
older PC's that do not automatically detect COM3 and COM4.
Utility Disk Contents.
The utility disk contains the following programs:-
ADDRCOM3.EXE
ADDRCOM4.EXE
ADDRLPT2.EXE
ADDRLPT3.EXE
COMTEST.EXE
COMM.BAS
COMM.EXE
RS232.BAS
RS232.EXE
RS422.BAS
Serial Utilities and Programming
CHAPTER 5
Set/reads the address of serial port COM3.
Set/reads the address of serial port COM4.
Set/reads address of printer port LPT2.
Set/reads address of printer port LPT3.
Comprehensive serial port test program.
Utilises the LOOP BACK self test mode
of the serial port chip.
Ultra simple BASIC RS232 port sample
program.
Exe file of the complied BASIC source
code.
BASIC program useful in debugging
RS232 problems, not interrupt driven.
Ready to run, compiled version of BASIC
program.
BASIC program useful in debugging
RS422 problems, not interrupt driven.
Demonstrates RS422 handshaking method.
Chapter 5 Page 55
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