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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!torn!news.ccs.queensu.ca!qucdn!leek
- Organization: Queen's University at Kingston
- Date: Tue, 5 Jan 1993 14:36:04 EST
- From: <LEEK@QUCDN.QueensU.CA>
- Message-ID: <93005.143604LEEK@QUCDN.QueensU.CA>
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: How to get some digital I/O in and out of an Amiga?
- References: <1ia5c6INNl3m@usenet.INS.CWRU.Edu>
- Lines: 19
-
- In article <1ia5c6INNl3m@usenet.INS.CWRU.Edu>, kar5@po.CWRU.Edu (Kevin A. Roll)
- says:
- >
- >Well, forget about modems with CODECs... I think I have a solution to my
- >hardware problem. It occurred to me last night that the joystick port can
- >be used as a simple 4-line digital input... which would read in my DTMF
- >tones just fine. However, I still need another input to tell me when the
- >phone is ringing and an output to pick up/hang up the phone line. (I'm
-
- There are additional 3 I/O port bits on the joystick port. PotX & PotY
- can be set as outputs. They are kind of slow (on the order of
- milliseconds), but sufficient for your use. They can also be used as s
- either analog (reading in resistance from an ananlog joystick) or digital
- inputs (mouse buttons). I think there is also the Fire button which can
- be used as an input. All the programming info should be available in
- RKM hardware manual.
-
- K. C. Lee
- Elec. Eng. Grad. Student
-