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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!ukma!wupost!spool.mu.edu!umn.edu!limerick.cbs.umn.edu!hiroki
- From: hiroki@limerick.cbs.umn.edu (Hiroki Morizono)
- Subject: How do I control soft switches?
- Message-ID: <1992Nov16.190037.2147@news2.cis.umn.edu>
- Sender: news@news2.cis.umn.edu (Usenet News Administration)
- Nntp-Posting-Host: limerick.cbs.umn.edu
- Reply-To: hiroki@limerick.cbs.umn.edu
- Organization: University of Minnesota
- X-Newsreader: Tin 1.1 PL5
- Date: Mon, 16 Nov 1992 19:00:37 GMT
- Lines: 40
-
-
- Hi, I'm trying to open/close a switch using a solid state relay, from
- the game port of an apple2e, using game controller 0
- (there is this piece of lab equipment that needs to be turned on and off at
- 20 second intervals)
-
-
- The program looks something like this:
-
- 10 INPUT "on interval"; A
- 20 INPUT "off interval"; B
- 30 INPUT "repeats "; C
- 40 FOR L = 1 to C
- 50 POKE -16295,253
- 60 FOR O = 1 TO A : NEXT O
- 70 POKE -16296, 0
- 80 FOR F = 1 TO B : NEXT F
- 90 NEXT L
-
- -16295, -16296 are supposed to turn the game control output on and off,
-
- So before doing anything, I decided to just put wires in pins 5 and 3,
- Game control 0, and ground , and hook em up to a multitester. Got no changes
- when I ran the thing. (I used long intervals--100, 300 etc)
- Pin 2 (+5V) and Pin 3 (Gnd) gives me back 5v, so it isn't a loose connection.
-
- How do I turn on and off the soft switches?
-
- Am I right in assuming that once TTL is set high, it stays high, or do I
- need to enclose the "switch on" magic woid/line between my FOR-NEXT statements?
-
- What am I doing wrong (besides poking at the brains of my computer)?
- (I don't need a nice program for now, just one that does the job)
-
- Email would be very gratefully appreciated,
- Thanks in advance,
- Hiroki Morizono
- hiroki@limerick.cbs.umn.edu (Machine is supposed to be taken off line tonight)
- mori0009@student.tc.umn.edu (Might be a better place to try.)
-
-