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Help with Keyboard Hack

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onesimo:

thanks for the advices. yeah, i got tires mapping the matrix..   il try fininshing it later. "here" is the philippines, i think ultimarc ships only in US, Australia, and Japan.. and i have a limited budget. im thinking about hacking a USB gamepad (topway because its cheap).

i have tested my keyboard for ghosting, i get only 2 buttons pressed when i press for example (x1,y1) (x2,y1) and (x2,y2) only the first two keys show in the keyscan. that's blocking right??? so if i assign the (x2,y2) to be the coin key will it still be a problem??

---i already made my plans for the controller using autoCAD 2004. should i use a MDF instead of Wood?? what is the best for my controller.

NoOne=NBA=:

If you can get two PS1-style USB gamepads cheap, that will give you the 2-sticks/8-buttons per player you want.

That would let you use the keyboard hack for coinup/player start/admin functions.

paigeoliver:

I am pretty sure Ultimarc ships worldwide. I believe Groovygamegear does as well.

Buy an encoder, if you need to save money on your project then save it somewhere else.

Keyboard and joystick hacks tend to FALL APART over time. I have done a few dozen of them and only 2 of them ever held up. The two that held up both used PCBs out of "fighter" type joysticks that didn't really have to be hacked so much as simply wired up to different controls.

Tiger-Heli:


--- Quote from: Gootfu on June 08, 2005, 04:20:59 pm ---Not in my case...
hacked several keyboards and as soon as I added 5 I get CASPER.

--- End quote ---
Okay, this is getting way off topic, but if you assume a 16x8 matrix, then the best you can do is 4 button per player, UNLESS you purposely allow the opposite joystick directionals to ghost (They can never be pressed simultaneously anyway).  This gives you the extra 4 inputs for a SF style panel.  This is all explained at the EmuAdvice link above.

Tiger-Heli:

First off, heed the previous replies.  An encoder will work much better.  Otherwise two gamepad hacks and a keyboard hack for admin keys will get what you originally wanted.

--- Quote from: onesimo on June 08, 2005, 09:29:37 pm ---i have tested my keyboard for ghosting, i get only 2 buttons pressed when i press for example (x1,y1) (x2,y1) and (x2,y2) only the first two keys show in the keyscan. that's blocking right??? so if i assign the (x2,y2) to be the coin key will it still be a problem??

--- End quote ---
Sounds like blocking to me.  There are compromises with a keyboard hack.  The SF panel action keys should work with no problems.  What it means is your start or coin inputs may not register if someone else is pressing the right combination of two buttons at the same time you depress the coin input.  Not very likely to be a problem, but possible.

--- Quote ------i already made my plans for the controller using autoCAD 2004. should i use a MDF instead of Wood?? what is the best for my controller.

--- End quote ---
Lots of people use MDF.  I think I would.  It has a smooth finish and takes paint, vinyl, laminate well, etc.

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