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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.

I find myself in need of someone to perform a couple of small experiments for me... Experiment 1: Open Key Caps or something else with a text box that supports arrow keys Hold down the shift key Hold down the keypad +/left-arrow key until it starts repeatedly inserting + signs While still...

Do we know that the official LocalTalk transformer has a higher DC resistance? (I don't know how to test this, and I don't have a LT dongle anyway.) Because the official schematic definitely has TxD± being fed directly into the transformer without a series cap...

This could be a cool project if anyone wants to take it up. My only Mac with a comms slot has it occupied by an ethernet card, though... I'd like to better understand this as well. I think the transformers provide true isolation between the bus and the devices connected to it while the...

I wrote some firmware this morning for the 1704, it uses a fixed-length loop that gets the clock in the ballpark (359.2 kHz, says the scope) if not as accurate as the 1501 with its NCO. Like the 1501 firmware, it also does 2x oversampling and has a LUT in case some manner of compensation is...

Status update. So, a few iterations later, I have some firmware for the PIC12F1501 that's about as densely packed as I can get it. Besides generating the clock and both RxD+ and RxD- (so no RS422 IC is required), it does 2x oversampling and has a 512-position lookup table that can be selected...