[Coco] Joystick button (peek)

[L. Curtis Boyle]

The joystick buttons share the same PIA pins as the keyboard - so if your keyboard locks up when you plug the joystick in, that means that a joystick button(s) is being pressed immediately. I would check the buttons on the joystick itself - it seems one (or both) of them is staying clicked.

L. Curtis Boyle
curtisboyle at sasktel.net



> On May 18, 2017, at 5:18 PM, Glen Hewlett <glen.hewlett at sympatico.ca> wrote:
> 
> Hi Rietveld,
> 
> I think from basic you can read the joystick values from the following:
> 
> $15A Left Vertical Joystick value
> $15B Left Horizontal Joystick
> $15C Right Vertical Joystick value
> $15D Right Horizontal Joystick
> 
> If you make a little program like this:
> 10 ?peek(&H15A)
> 20 goto 10
> 
> Run it and click on the buttons I think the values will change maybe setting the higher bits… and you can test for these changes.
> 
> Also looking at the unravelled series I found this:
> FF00		BIT0	KEYBOARD ROW 1 AND RIGHT JOYSTICK SWITCH 1
> BIT1	KEYBOARD ROW 2 AND LEFT JOYSTICK SWITCH 1
> BIT2	KEYBOARD ROW 3 AND RIGHT JOYSTICK SWITCH 2
> BIT3	KEYBOARD ROW 4 AND LEFT JOYSTICK SWITCH 2
> BIT4	KEYBOARD ROW 5		
> BIT5	KEYBOARD ROW 6		
> BIT6	KEYBOARD ROW 7		
> BIT7	JOTSTICK COMPARISON IINPUT
> 
> So maybe just doing a peek(&HFF00) will give you the values you are looking for...
> 
> I can’t test this myself since I don’t have a working Joystick.  I bought one at the last CoCo Fest but when I plug it into my CoCo3 it locks the keyboard up.  If I unplug it the keyboard works again.  I’ve tried both the left and right joystick ports but the same thing happens.  It is a deluxe joystick that someone added an extra button on (it has two buttons).  Maybe I’ll take it apart sometime and fight with it.
> 
> I hope the little info I gave you helps.
> Cheers,
> Glen
> 
> 
>> On May 18, 2017, at 4:32 PM, Rietveld Rietveld <rietveldh at hotmail.com> wrote:
>> 
>> Does anyone know the 'peek' to check for a 'button(0)' or 'button(1)'
>> 
>> Sent from my BlackBerry 10 smartphone.
>> 
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