Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!decwrl!public!valentin From: valentin@public.BTR.COM (Valentin Pepelea) Newsgroups: comp.sys.amiga.programmer Subject: Re: Accessing BUSY, SEL, and POUT via "parallel.device"? Message-ID: <2421@public.BTR.COM> Date: 16 Apr 91 04:38:39 GMT References: <1991Apr12.165832.12620@jarvis.csri.toronto.edu> Organization: BTR Communications, Mtn. View, CA Lines: 20 In article dillon@overload.Berkeley.CA.US (Matthew Dillon) writes: > > The parallel.device only handles a printer. To use the parall port in > a bidirectional manner you must allocate the appropriate resources > and access it manually. Actually, the parallel.device is bidirectional, depending on what you mean by that. Just wire-up a NULL-parallel cable, where pins 1 and 10 are crossed and pins 23 & 25 are cut. Only one computer may send data to the other at any moment in time, so you have to establish a little protocol in which one computer tells the other when it is about to be the sender, and how much data it intends to send. Valentin -- "An operating system without virtual memory Name: Valentin Pepelea is an operating system without virtue." Phone: (408) 985-1700 Usenet: mips!btr!valentin - Ancient Inca Proverb Internet: valentin@btr.com