home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!pageworks.com!world!eff!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!ucdavis!josquin.ucdavis.edu!user
- From: jhgillespie@ucdavis.edu (John Gillespie)
- Newsgroups: comp.sys.mac.hardware
- Subject: Changing DTR on a Mac II serial port
- Message-ID: <jhgillespie-121192151816@josquin.ucdavis.edu>
- Date: 12 Nov 92 23:18:47 GMT
- Sender: usenet@ucdavis.ucdavis.edu
- Followup-To: comp.sys.mac.hardware
- Organization: Center for Population Biology, UCD
- Lines: 9
-
- I want to use the DTR line on the modem port of a Mac II to send
- a timed pulse to some lab equipment. I am totally unfamiliar
- with low-level programming on the Mac so I need help bad! My assumption is
- that I can write to the control register on the Z8530 by writing a control
- byte to address sccWBase+aCtl. Is that correct? Next question: What
- is the numeric value of sccWBase and aCtl on the Mac II? Am I correct
- in thinking that the serial driver is of no help here? Finally,
- I can't be the first one to want to do this, is there a book or FAQ or
- something pointing the way? Thanks for any help that you can offer!
-