Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!caen!spool.mu.edu!uunet!comp.vuw.ac.nz!cc-server4.massey.ac.nz!H.Jones
From: H.Jones@massey.ac.nz (H.S. Jones)
Newsgroups: comp.lang.pascal
Subject: Serial COM port communication
Summary: Request UNIT for serial COMMs ports
Keywords: serial, COMM
Message-ID: <1991Jun4.215508.6988@massey.ac.nz>
Date: 4 Jun 91 21:55:08 GMT
Article-I.D.: massey.1991Jun4.215508.6988
Organization: Massey University, Palmerston North, New Zealand
Lines: 19
X-Reader: NETNEWS/PC Version 2.1

I am looking for a unit which will allow me to read and write data to and
from _BOTH_ serial COM ports on an AT computer.  At present I am using TP
4.0 and using the unit ASYNC4 written by  Quinlan and Dealey but this only
works for one port at a time.  I am using each port to run a separate stimulus
controlled by an external microprocessor and it is now required that they
run simultaneously.  The ASYNC4 unit includes an interrupt service
routine written in machine language but only addresses the one port which
has been opened.  I really don't want to re-invent the wheel but perhaps
there is someone out there who is also crazy enough to use two serial ports.

	Thanks in advance,  (I hope)
	Harvey

-- 

| Harvey Jones				Email - H.Jones@massey.ac.nz
| Psychology Department			Fax   - (06) 3505-611
| Massey University			Phone - (06) 3569-099 Ext 8198
| New Zealand.