68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | |
| Macintosh IIci Logicboard recreation | |
| Posted by: max1zzz on 2024-04-01 12:55:49 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 | |
| Posted by: max1zzz on 2024-04-24 14:59:46 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 | |
Posted by: max1zzz on 2024-04-24 16:23:29Can I build this using IIsi donor parts? I have a spare, bombed board without case…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! | |
| Posted by: max1zzz on 2024-04-24 16:26:59 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 🙂 | |
| Posted by: max1zzz on 2024-06-15 14:56:31 Gerbers and schematic are now on GitHub GitHub - max234252/Macintosh-IIci-Reloaded: Near 1:1 Reproduction of the Macintosh IIci LogicboardNear 1:1 Reproduction of the Macintosh IIci Logicboard - max234252/Macintosh-IIci-Reloaded
github.com
As with my other designs these are provided under a non-commercial licence but if you are a repairer and want to offer transplant services (or have any other commercial use in mind) please contact me The BOM needs a little cleaning up as it is currently pretty much a raw export for KiCad | |
| Posted by: HardwareHacker on 2025-07-21 20:38:33 Are these available for order or is it completely self-service? | |
| Posted by: finkmac on 2025-07-22 07:03:22 it's available for order wherever fine PCBs are manufactured | |
| Posted by: max1zzz on 2025-07-22 12:31:45 I do still have a couple of PCB's left, or the designs are on github and you can order them from whoever your favourite PCB manufacturer is | |
Posted by: Jockelill on 2025-07-22 23:31:09Are these available for order or is it completely self-service?You can reach out to @WillJac here on the forum otherwise, he’s doing repair/transfer services (and works with @max1zzz already). Otherwise you can order the boards from JLCPCB or PCBWAY. | |
| Posted by: HardwareHacker on 2025-07-23 09:48:39 What kind of numbers are we talking about here? I live on the east coast of the United States @max1zzz | |
| Posted by: Mk.558 on 2025-07-23 10:13:41 The original IIci board is 4 layers deep? If so, I'm told the SE/30 is 8, which must have been expensive in the 80's. | |
| Posted by: Boctor on 2025-07-23 10:25:14 I could've sworn SE/30 logic board (and IIsi?) was six layers, and the IIci and IIcx's middle layers were the ground/power planes, with the logic conveniently on the visible sides. | |
Posted by: croissantking on 2025-07-23 13:18:24I could've sworn SE/30 logic board (and IIsi?) was six layers, and the IIci and IIcx's middle layers were the ground/power planes, with the logic conveniently on the visible sides.Yes, the original SE/30 boards are six layer. | |
Posted by: max1zzz on 2025-07-23 16:10:55The original IIci board is 4 layers deep?Indeed it is, just two signal layers on the outside and then power / ground on the inner two | |
Posted by: max1zzz on 2025-07-23 16:13:24What kind of numbers are we talking about here?The PCB's are £45 and shipping to the US for a single boar is £16.75 The boards come with all the birdseed on the bottom side populated (bar the two transient suppression diodes under the ADB ports) so you just need to move the topside components over | |
Posted by: HardwareHacker on 2025-07-24 09:40:30The PCB's are £45 and shipping to the US for a single boar is £16.75$69.90 USD. Hmmm I'll need to think about it. I'm low on funds at the moment | |
| Posted by: Scorpio_ny on 2025-10-29 08:04:12 Hi @max1zzz, Do you happen to have any boards left? I am interested in one to have it shipped to the US. | |
| < 4 |