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Things have been moving a little slowly lately but I'm finally getting things sorted out :) For those that wish to purchase boards: https://68kmla.org/bb/index.php?threads/fs-itxplus-pcbs-kits-and-assembled-boards.50166/ And for those that wish to build their own from scratch...

I will indeed have a few for sale soon :)

Port PCB's arrived (which I totally hadn't forgotten to order....) and the board has been fully tested and works just fine :) I guess now I need to tidy up the schematic, after all I did leave this note in it :ROFLMAO:

I believe CayMac is out of parts, I still have a few more boards waiting to be built up but I am waiting for more MCU's from china. Should be here in the next month or so

Just a short late night post: V1.1 boards have arrived and passed a basic power on test with no bodges :) Only problem I had was nothing to do with the board, I brought a bunch of NOS DRAM IC's and about 1/3 of them seem to be bad. Had me hunting for assembly issues for a while before I just...

Very nicely done! I guess now I have no excuse for relegating that pile of CII boards to donor status :) On you comment on github of not knowing the ASIC pinouts, have a look at the LC II schematic: https://www.macdat.net/files/pdf/apple/schematics/apple/lc_ii.pdf As the pinouts for the main...

As far as I am aware no one makes FPM (or EDO) ram new so it's NOS or reclaimed - it's one of the reasons I went with 1Mx4's to begin with, it's very easy to find simms that the chips can be "borrowed" from

😅 I was only slightly doubting my own maths there :) Off the top of my head I think it's about 2/3rds the size in both dimensions but I'll double check that later

I'm not quite following? 8 1M x 4 bit chips makes 4MB

They are 1Mx4 ones, essentially the equivalent of 4 2 chip simms, I do also have some 1M x 16 chips on order to experiment with as it would allow just two chips to be used

Revised boards have been sent off to JLC :)

I swear you have clones on just about every accelerator known to man on the go :)

Logicboard wise the IWM is the only part left, and that's only needed if you want to use a floppy drive. These boards are designed to use a pldSCHWIM to bypass the need to have a IWM installed and can be built entirely without and original parts

That case uses a pico PSU (you can see the module plugged in to the bottom left corner of the board) which is fine here, the hole thing with a BlueSCSI connected only draws about 10w

Yes it's a very small form factor ITX case, there isn't any provision in this one for expansion cards but that's not really a issue here as the Performa clone would lay flat on the board anyway (and I was trying to build a really small system :) )

So what's next? The boards need a little tweaking to resolve the issues noted above, once this is done I'll get another run of test PCB's made and tested and then post the designs up on github I also intend to make a Port Riser board with connections for a original keyboard and mouse should...

So with the board booting it's time to look at the I/O First to be tackled was the SCSI connectors, these where soldered on and the board booted Mac OS 7.1 from my BlueSCSI just fine. That's good! it's nice when stuff just works :) Except..... Apparently I used the wrong footprint.... Oh well...

Build is looking good! Just waiting for my BlueSCSI PCB's so I can finish it off

So, As mentioned above the board is now booting and working just fine but how did we get here? When the board was initially tested after assembly it did nothing at all. No chime and no video. Though frustrating this is kind of what I expected, the scan of the apple schematics we have is not...