Macintosh IIci Logicboard recreation

[max1zzz]

Boards are on order!
I have ordered 30 boards, all with the bottom side birdseed populated. Boards are purple with a ENIG finish

The good news is that although the order as a hole was pretty expensive the per board cost is actually lower than I expected so it's looking like the final price will be at (or maybe even below) the lower end of my initial estimates but I can't commit to a price just yet as I want to see what the import VAT bill is first!

I expect it's going to take a few weeks for these to be produced, assembled and shipped to me

 

[max1zzz]

Boards have arrived and been tested!


These have a couple of modifications you may be able top see:
There is now a ATX connector behind the NuBus slots for people who wish to replace the original PSU, just keep in mind this will prevent most full length NuBus cards being installed in the left most slot. IF you are fitting this you will also need to install a 2N3904 at Q6 (this is not required if you are not fitting the ATX connector)

There is a position for a ATTiny85 to be fitted with the firmware available here: https://github.com/pgreenland/attinyrtcmodule if you RTC chip has been damaged by battery leakage. If this is fitted you do not need to install a battery holder, diodes or the 32.768Khz crystal as the firmware saves pram data to the ATTiny's internal EEPROM, you do however need to fit at 16Mhz crystal at Y8 (Y8 is not required if you are using the original RTC chip)

Finally there is a position for a DIP ADB controller, intended to be used with a PIC16F87/88 with @tashtari's port of the ADB controller firmware available here: https://github.com/lampmerchant/macseadb88 but you can also use a ADB chip from a SE should you have one spare. I have found with some PIC's I have this causes stuttering issues with ADB so needs a little further testing so for the time being I would recommend using the original ADB IC unless it is damaged

These boards will be £45 each + shipping, I will start a for sale thread in the trading section with more details
I will try and contact anyone who has expressed interest directly but if I miss anyone please send me a PM

For those who wish to order boards directly themselves the designs will be on github shortly once I have tidied up the project folder

 

[max1zzz]

Can I build this using IIsi donor parts? I have a spare, bombed board without case…
I‘d be happy without NuBus slots…

Just came across this this again when going back through the thread, the answer is maybe. The IIci and IIsi share some customs, specifically the RBV and MDU, ignoring the NuBus controller and bus transceivers the only other custom parts not shared with the IIsi are the ADB controller (a very common part on other boards or can be replaced with the PIC16F87/88) and the RTC (Not as common but can be replaced with the ATTiny85). What I don't know is how the board would act with the NuBus controller missing. Would be interesting to try!

 

[max1zzz]

Right, I think I have maybe PM'd everyone that expressed interest but it's getting late and I have probably missed people.... If that;s you pleas PM me