Re: IIGS Joystick issues

["Ferdinan Meyer-hermann" <ferdinan.meyer-hermann@a2central.com.remove-5h3-this>]

  To: Drew
Drew wrote:

> Hi,
> 
> I am hoping this is a simple one :-). I have a ROM03 IIGS with a
> ZIPGSX (12.5Mhz 64K) and have recently got it out of storage. I was
> trying to play some old games last night but the joystick wouldnt move
> down at all (up left and right worked fine). I tried the joystick on
> another GS with another ZIPGSX card and all worked fine.
> 
> I have made sure the CDA for the ZIP says that joystick delay is
> enabled.
> 
> Any ideas?
Two, actually.
The first: Your joystick is out of calibration.
start the GS and type in the following simple applesoft program:
]NEW
]10 PRINT PDL(0),PDL(1)
]20 GOTO 10
]RUN

You will have two columns of lines on-screen.
the first is the X-Axis (left/right), while the second is the Y-Axis
(up/down). The values should be 0 in the upper/left position, 127 in the
middle and 255 in the lower/right position.
If the middle values are incorrect, you can adjust them using two controls
that are usually on the bottom of the joystick. The calibration needs to be
done for every computer the joystick is used on. It will, usually also work
on others, but you don't know for sure. If the middle value is 127 and 255
is still not reached in the lowest position, then you need idea two:
The joystick port uses some capacitors that can go out of tolerance. You
will then not be able to get the full range out of the joystick. The best
solution would be to replace the caps, but I don't know where they exactly
are. At least you can also connect a correction cap in the Joystick
connector or even to the joystick (this is what I did when I had the same
problem). If you have calibrated the joystick and tell me the readings you
get in the extreme paddle positions, I can tell you which cap you would
need, and where to connect it.

Regards,

Ferdinand