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I don't know if quadrature mice are as hard/expensive to come by as Plus/512k/128k keyboards are, but in case you need one on the cheap, I've made some PIC firmware for a PS/2 mouse converter. Like the Plus/512k/128k keyboard converter I made, I'm sure this has been done before somewhere, but I...

Got a PCB! It makes a pretty neat and tidy little dongle once covered in heatshrink. I'll make up some kits for sale if anyone finds this interesting.

Ah, yeah, I've RE'd the Firebird joystick, though I don't know if mine is the same as the Firebird 2. It looks similar except for the color scheme (mine has green buttons and red levers)...

Not familiar with that one, looks like it's a cut-down version of the Firebird? I only see the PC version on ebay, did Gravis ever make an ADB version?

It's doable, yeah, though as you say, the mapping would be highly awkward... part of the appeal of making a SNES controller emulate the GamePad is the straightforwardness of the button mapping. From a firmware perspective, it's not very difficult to make a SNES controller emulate a...

Though... in that case you'd also have to feed the "line clock" line 50 or 60 Hz from somewhere.

Code posted on Github (firmware is now using 1023 words out of 1024, hah.) https://github.com/lampmerchant/tashpower For anyone like me who's not up to dealing with mains current, it's also possible to use this in an ATX conversion, just connect +5VSB to the PIC (and the PS/2 keyboard if...

I wrote some PIC firmware! (Who's surprised?) The firmware emulates the PowerKey Classic (PK-1), controlling a single relay with a clock signal extracted from the mains AC waveform, and includes a PS/2 keyboard protocol converter so not only can you make your non-soft-power Mac soft-power, you...

A device for sound input (over the serial port) that predates the introduction of native sound input capability on Macs, capable of delivering 8-bit samples at 22 kHz.

Possibly! I'd put a watch on the TashRecorder thread - if @demik or I are selling kits, we'll announce there.

That's at least most of what it does. I think someone experienced in such things could write a driver for it for the IIgs without too much trouble (does the IIgs have a Shut Down command like the Mac does?). The PowerKey will close the relay when the power key is pressed, and an ADB Listen...

Thinking about this again... I'd really like to make something that duplicates the PowerKey Classic's functionality, but the problem is tricksy due to matters of power and isolation. The microcontroller in the device needs to be powered full-time so it can power the Mac up on a schedule, plus...

Thanks. =D I think @demik deserves most of the credit for this one, though. The firmware was an interesting challenge in some ways, but his work on the analog side of this project was considerably more complicated...

Forgot to update this thread, in case anyone was watching and missed it - @demik and I have released TashRecorder!

Oh, right, the code... https://github.com/lampmerchant/ps2-to-plus-keyboard

I'm sure someone's done this before, but I enjoyed the challenge (I used all but 61 words of program memory and all but 4 bytes of SRAM!)... I made some firmware for the PIC12F1501 that lets a PS/2 keyboard be used with a Mac Plus or the other Macs that used the phone-cord keyboard. It makes...

Elevate your game! Introducing... TashPad! Elevator Pitch It's a converter that makes a Super Nintendo/Super Famicom controller appear to an ADB Macintosh as a Gravis Mac GamePad. Used with the GamePad's control panel, it can be used to play all your favorite Mac games. I made the...

Got my answers from @Scott Squires - thanks!

Ah, I see. It's possible... it's even possible that it would change depending on the OS, I suppose I'm just hoping it doesn't.

Not that I'm aware of. I'd be happy with the results from whichever one you have to hand.