Re: IIGS Joystick issues

[Drew <GoggleDrew@gmail.com>]

On Aug 27, 8:28 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> Drew wrote:
> > On Aug 20, 7:16 pm, Drew <GoggleD...@gmail.com> wrote:
> >> On 20 Aug, 07:45, Drew <GoggleD...@gmail.com> wrote:
>
> >>> On 19 Aug, 20:25, "Ferdinan Meyer-hermann" <ferdinan.meyer-
> >>> herm...@a2central.com.remove-5h3-this> wrote:
> >>>>   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 thejoystickwouldnt move
> >>>>> down at all (up left and right worked fine). I tried thejoystickon
> >>>>> another GS with another ZIPGSX card and all worked fine.
> >>>>> I have made sure the CDA for the ZIP says thatjoystickdelay is
> >>>>> enabled.
> >>>>> Any ideas?
> >>>> Two, actually.
> >>>> The first: Yourjoystickis 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 thejoystick. The calibration needs to be
> >>>> done for every computer thejoystickis 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:
> >>>> Thejoystickport uses some capacitors that can go out of tolerance. You
> >>>> will then not be able to get the full range out of thejoystick. 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 theJoystick
> >>>> connector or even to thejoystick(this is what I did when I had the same
> >>>> problem). If you have calibrated thejoystickand 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
> >>> Thanks for all the info :-), will give that a try tonight.
> >>> Drew- Hide quoted text -
> >>> - Show quoted text -
> >> Hi Ferdinand,
>
> >> Thank you so much for that basic program to check calibration. As soon
> >> as did that all was ok. They must have been so far out that :-). For a
> >> bit I thought my iigs setup was conflicting for some reason.
>
> >> Cheers
> >> Andrew- Hide quoted text -
>
> >> - Show quoted text -
>
> > I went to play Silpheed today (on ROM03, ZIP GSX) and noticed that i
> > could not go down the screen using my CH Mach 3 Joystick. I thought
> > that maybe my calibration was out so ran the basic program to
> > calibrate only to find that everthing was perfect. I ran couple of
> > other games and joystick ran fine. I then used a spare joystick i have
> > which is a Kraft one and everything worked ok. So there seems to be an
> > issue with my CH March 3 and Silpheed...which seems odd as it seems to
> > work fine with every other game I have. Any ideas...or is it just one
> > of those things..?
>
> You may find that a  slight tweak in the direction of increasing the
> "down" values will get it to work.  Some games assumed that all
> joysticks could present resistances that would result in a full 0-255
> range for the normal paddle routines.
>
> If your joystick in fact covers the full 0-255 range, then the
> Silpheed paddle reader may actually be incorrect, in the sense
> that it requires an even larger resistance than would produce
> 255 with the standard paddle routine.
>
> -michael
>
> AppleCrate II: An Apple II "blade server"!
> Home page:  http://members.aol.com/MJMahon/
>
> "The wastebasket is our most important design
> tool--and it's seriously underused."- Hide quoted text -
>
> - Show quoted text -

Hi,

I did notice that the maximum down value was a max of 250 rather than
255. I will have a play with the calibration.

Thanks

Drew