Internal PS/2 Port

KermMartian · Post by **KermMartian** » Thu 05 Oct, 2006 7:22 pm

Edit: holy #^&#^&, it works perfectly. The ol' TI can certainly give enough current for both keyboard and mouse.

Earlier today.... Looks like it works! 5.064v coming off it from the zener diode regulator, and plugging in a keyboard or mouse turns on the calc. I'll test it when I get home. My only concern at this point is that the calc won't be able to produce enough current to drive the PS/2 devices - the protocol defines max current for a PS/2 device as 275mA, and I _know_ AAAs can't produce that too well. Hopefully non-optical PS/2 mice and keyboards take more along the lines of 40-60mA. I will of course be testing it with the Emerson demo, since I'm still writing the mouse and keyboard SEs for Doors CS with the Emerson library.

Red = +5v
Black = gnd/com
Yellow = tip
Orange = ring.

thegamefreak0134 · Post by **thegamefreak0134** » Thu 05 Oct, 2006 11:27 pm

Wow. That's one big image. What are the plans for this? It could make a calc drawing program very exciting, no?

CompWiz · Post by **CompWiz** » Fri 06 Oct, 2006 3:30 am

or make an FPS very exciting. I've always preferred mouse over joystick for fps games.

Post by **benryves** » Fri 06 Oct, 2006 9:25 am

Wow. Now that's cool, even if the soldering job is a tad scary.

(Have you soldered them on, or is it just hot-melt glue gun stuff?)

(Oh, and - video please!)

How're you finding the library?

KermMartian · Post by **KermMartian** » Fri 06 Oct, 2006 12:53 pm

Video coming this weekend. The Emerson demo worked wonders, although the first keyboard I tried it with had debouncing issues. I'm working on full autodetecting PS/2 support for DCS now. Oh, and of course it's soldered on. the hot glue is just to insulate it. I'm a fan of hot glue-can you tell?

King Harold · Post by **King Harold** » Fri 06 Oct, 2006 2:20 pm

But how about 84's they don't have that much space near their linkport.. make a long wire all the way down to the bottom of the calc? It would still be way cool though.

by the way, I thought PS/2 things have 6 pins, are 2 of them unused?

KermMartian · Post by **KermMartian** » Fri 06 Oct, 2006 2:37 pm

That's correct. Two pins are indeed unusued.
Not quite sure how you'd do this mod for the 84, but there's no reason why you _couldn't_ run the wires down to the bottom...

Post by **benryves** » Fri 06 Oct, 2006 2:54 pm

The only reason, of course, to do this on the 84 is so you could combine it with usb8x to use a keyboard and mouse at the same time

Autodetection within Emerson is a bit flakey, Kerm - sometimes you need to remove and reattach the device if it gets confused. If you can find a workaround, I'd be interested to hear it. That routine was written very quickly.

I, too, have had the odd debouncing issue on one keyboard. It could well be a bug in the library, probably (99%) that it doesn't pick up the "release" prefix byte due to a timing bug. Which makes sense as different devices have different clock rates. I wish I had more time to look into it, though as you're working actively with it I look forwards to any discoveries! Adding a code-based debouncer should be rather simple to do, though.

Oh, and this relates to you:

ravuya wrote:You guys are either the sickest bastards imaginable or some sort of modern-day folk heroes. I salute you all.

Feel proud

KermMartian · Post by **KermMartian** » Fri 06 Oct, 2006 4:53 pm

Oh, I do. That's definitely a complement in my opinion. Thanks for posting that up there!

KermMartian · Post by **KermMartian** » Fri 06 Oct, 2006 5:36 pm

*bump* This video will be live in a few minutes. Sorry for the bad quality.
http://www.youtube.com/watch?v=I_aVj7Ot7bU

Shawshank87 · Post by **Shawshank87** » Fri 06 Oct, 2006 6:57 pm

thats tight man, congrats.

CompWiz · Post by **CompWiz** » Fri 06 Oct, 2006 8:18 pm

yeah, it looks nice.

Timendus · Post by **Timendus** » Sun 08 Oct, 2006 10:14 pm

You really need to get yourself a tripod dude

Nice hardware mod, well done.

KermMartian · Post by **KermMartian** » Mon 09 Oct, 2006 1:11 am

Timendus wrote:You really need to get yourself a tripod dude
Nice hardware mod, well done.

O.o A compliment! Thanks Timendus, that means a lot to me coming from you. Yeah, a tripod would pwn.

Timendus · Post by **Timendus** » Mon 09 Oct, 2006 8:03 am

You're welcome

I'm getting more and more curious to see a release of DCS6... PS/2 hardware, calculator networking... I still have to see you pull it off, but it sure sounds promising enough