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... AAAAAAAAAND it's working! 🎉 All of that thanks to @Builder68 who noticed that I had one ping wrong on two 47Ω resistors. So far we build a few boards of the last PCB revision (v2.1) and they are working fine after a few days of stress testing (minus some limitations, that the original has...

Damn impressive work! Player Pro module when ? 😋

Thank you. It's a passive devices. Two examples that happened - tweaking ROMs or stuff plugged into the ROM slots. The display will display "o" because the overlay was kept active. Reason: damaged ROM socket: ROM not read, so overlay kept asserted - black screen (CRT) display, no visible vsync...

Hello everyone, Posting this here, this is really niche. Built it while developing other stuff for early Macs It's a small debug board that plug in place of the VIA (or on top of if you can find the correct clip). It includes a 7 segment display which is useful for displaying the following...

From my understanding when building the daughter board to replace the breakout box, the OPL3 goes through the mixer. There is few places where you can poke if the sound comes out. Check the opamp U11B outputs or the OPL preamp before that

Good to know thank you. I'm gonna order more for my 500 build

Is the PRAM battery the same Panasonic rechargeable thing as in the 1xx series ?

Holly shit. Hope this get somewhere. Nice work. Is there a ROM dump somewhere so we can compare with @bigmessowires ROM disassembly ?

Ha, not sure if you want/can cancel the order and wait for the next PCB revision (the one with selectable ESC+DEL and PGUP+PGDN) block. Although knowing my todo list, there may be a "few" weeks of delays :)

That's not how it works :LOL: . I always give my remaining PCBs, so sure for one PCB it's expensive but still less than building more keyboards :)

Does the PSU stay on by itself ? (No load / no logic board / nothing) The other thing to try is to force the PSU on, and see if the Mac keeps running. That may be a fault on the 7100 side (either soft power, or a short, or something). BTW the caps on theses are just falling as bad as 68k ones

Missed that, amazing job!

As @Tashtari said, we don't mind as long as the license is respected. It's nice that you had fun with this, also nice soldering skills! That's exactly the way :)

I tried that unfortunately it doesn't work. While replacing the footprints and rerouting would only take a few hours, the issue is that ALPS switches are rectangle and slightly bigger than cherry switches, so they will not clear the plate They require a PCB mount keyboard or a dedicated ALPS plate.

Damn, sorry forgot about that damn plate :oops: It seems there is still a way. We got lucky with the traces, so remove only PGUP+PGDN switches and cut the top traces from there, then add one wire to fix Y7 (return / backspace). Here is a schematic for you As for DEL, it's X14 and Y6 - X14 is...

Well it's just a matter of wiring the switch where it's supposed to be in the keyboard matrix. On the Design68, the X pin is the "top right" on a switch, Y being the bottom left. (As seen from above the keyboard) For ESC you do need a switch between X17 and Y2. - X17 available keys are TAB and...

That's a good question. Are you willing to cut traces and use a couple of bodge wires to the controller pins ? (It's possible to use an extra switch for testing before messing with the PCB)

Nice job :) Liking the SCA HDD! Looks like an onboard switch bottom left. I'm assuming that's for switching between the LC Ethernet and the BMC ? Power Supply on the LC board looks bluetooth tho ?

finally got the "fun" Keycaps I wanted for my build (Keychron hacker PBT set)