Archived from groups: alt.comp.hardware.homebuilt (
More info?)
"Gary Tait" <classicsat@yahoo.cominvalid> a écrit dans le message de
news:lbrh90pjhfjg1n89ht2k5q2g7a6u9i1541@4ax.com...
> On Tue, 4 May 2004 21:11:37 -0400, "Mike" <dump@thisplace.com> wrote:
>
> >Reply at Bottom:
> >
> >"kony" <spam@spam.com> a écrit dans le message de
> >news:faag909oak05lhqu55heul8criaeq2domr@4ax.com...
> >> On Tue, 4 May 2004 18:31:15 -0400, "test" <dump@thisplace.com> wrote:
> >>
> >> >Greatings All,
> >> >
> >> >I hope I am at the right place to post about finding information on
how
> >to
> >> >build my own racing wheel joystick. I have found info on the net, but
> >still
> >> >have some questions about some ideas that I have about it.
> >> >
> >> >If I am not in the right place, please forgive this, and maybe point
me
> >in
> >> >the right place
> >> >
> >> >Thank you in advance,
> >> >Mike
> >> >
> >>
> >> Generally it's useful to go ahead and provide a concise list of these
> >> ideas, issues, etc. Some issues might be better dealt with in a gaming
> >> forums, others in an electronics forum, but until you mention what
> >> obstacles you're facing...
> >
> >Ok, I will try to be as clear as possible
And Thank you for your
answer.
> >
> >I have everything I need to Build the wheel, and components (linear trim
> >pots and wires and diagrams) But what I would like to add keyboard keys
used
> >with buttons that I would put with the joystick. For example, I broke
apart
> >a keyboard, and took the electronic part out, and would use the chipset
with
> >wired soldered to the pinouts. I hope things are clearer then I think.
> >*smile* The goal of all this is to add "unlimited" programable buttons
to
> >any game that support keyboard mapping. Since just about every game
does
> >that, I would just need to assigne the buttons to the functions I need.
> >
> >Let's say I add a shifter to my nascar racing. Gear 1-2-3-4 and R,
would
> >each have a button relayed to an assigned pinout of the keyboard
> >circuit.that would send a key to the game. Ie: Gear 1 would be soldered
to
> >the letter A, 2 to letter S, and so on.
> >
> >The part that I am getting trouble, is figuring out easily what pinout
> >equals to what letter. And if someone has used someway or idea to go
around
> >that. Would be easier doing it with USB, but I dont know how to use that
> >aside from unbuilding a working usb device and modifying it as I can
> >
> >Next part, I think it would be rather in electronics, as it would be to
> >actually make my own chip to assigne and program letters to pinouts.
> >
> >Hopefully, this got my idea a bit clear,
> >Thank you again for answering, I really appreciate the time.
> >Mike
> >
>
> Basically, a keyboard is a matrix, usually of 8 rows, and 10 columns
> or so. When a key is pressed it crosses a row line with a column line.
> Whch matrix crosspoint correspond to which keys will vary amongst
> keyboards.
>
> To obtain the matrix map, you have two realistic possibilitys;
>
> 1: Trace out the pattern on the contact sheets (just about all
> keyboards nowadays are plastic sheets with traces and contacts printed
> on them). Hint: one sheet surface will have the X matrix, the other
> will have the Y matrix. Sometimes the sheet surfaces are one piece in
> two or 3 folds, the X will be one, the Y another.
>
> 2: Plug in the interface, and using a text editor or something, and
> cross the matrix connections to see what letter or function comes
> out. I remember years ago (in the 80286 days) a DOS diagnostic utility
> from AMI that allowed you to test keyboards, and showed which key had
> been pressed. I remember the CMOS setup even had one in some BIOSes.
>
Thank you for your explanation and détails, Made me figure out how to find
my keys, even If I did unbuild my keyboard before. I will simply plug
keyboard in, and "hot wire" X1, and Y1, and so on. and see what it types
on screen
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