Re: How do I control soft switches?

[aa783@cleveland.Freenet.Edu (Mark Spaeth)]

In a previous article, hiroki@limerick.cbs.umn.edu (Hiroki Morizono) says:

>
>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.)
>
>

seems to be taht you proble is that you're not you're turning off and on
the annuciators which aren't accessed thru the game port on the back of he
computer... they're accessed on the 16 pin (?) little game port on the
motherboard...