I like this a lot and had similar ideas previously ^^ though my motivation isn't high enough atm to actually go through with it.

did you think about making it mini-DTX instead, adding another regular ISA slot below the SBC slot?
there is a lot of ITX cases that have 2 card slots so you could mount one card with bracket at least, and seeing as this is a custom design anyways, adhering to standards isn't the most important ^^

imi wrote on 2020-07-15, 11:56:

I like this a lot and had similar ideas previously ^^ though my motivation isn't high enough atm to actually go through with it.

did you think about making it mini-DTX instead, adding another regular ISA slot below the SBC slot?
there is a lot of ITX cases that have 2 card slots so you could mount one card with bracket at least, and seeing as this is a custom design anyways, adhering to standards isn't the most important ^^

The case where I want to mount it only has an available slot, it would not fit in Mini-DTX format. The board I am designing is not exactly Mini-ITX, it is a little (very little) wider... so that the ISA slot fits in the only available slot in my case. I just left it written in the first post of this thread, so there is no doubt about it.

Integration tests in a high profile Mini-ITX case and Micro8088 board inside:

https://photos.google.com/share/AF1QipM8HTva8 … XdlODItTUxIV0pn

how I hate those cases x3
a DTX board would easily fit there if they'd have aligned the board more to the upper edge.
but nice nonetheless.

Kicad project and more info available:

https://github.com/spark2k06/Universal-ITX-Backplane

Still in development but is taking shape. I have not yet come up with the design of a PCB for the upper part of the I / O ports, as well as a shield for this one also in PCB format for it ...

https://www.youtube.com/watch?v=EKXY5dlXFwU

Just wanted to update the topic, as the backplate is already available on Tindie, in fact there are only 2 left: https://www.tindie.com/products/spark2k06/uni … ackplane/#specs

This is cool in so many ways. You now have one less left 😉

I have an unused AMD Elan-based PC104 SBC and a couple of mITX cases I'm not currently using...

Wonder if this project is still alive?

This week I finally found time to solder my board.

Conclusions:
- read the *)&(*& errata before soldering. Saves having to de-solder a transistor, mess around with its legs and re-solder 😉
- the LEDs use the square hole for the cathode, not the anode (as I'm used to). It's not totally standardised, so I'd suggest in a future revision to explicitly mark polarity on the PCB silkscreen to be sure.
- speaking of LEDs, the voltages on three out of four seem off on my board. Only the +12V lights up fully, the others are very dim. Could be a design issue, could also be the very wide tolerance (20%) resistors in series (I ordered the board plus components and they weren't expensive) although I measured them as pretty near 10k Ohm, so don't think that's the issue. Will be experimenting with a few differnent resistors to see what's going on.
- the board is ITX as promised. Not mITX. Doesn't fit into mITX-only cases. Fortunately it's perfect in a low-profile uATX case, with the extra slots useful for various connectors off the SBC.
- but most importantly: IT WORKS 😀

Now moving on to using it; have it installed in an AOpen low profile uATX case with an AudioExcel CMI-8330 sound card (SB16 compatible) that fits nicely at low profile. All I need to do now is get an ATX backplate and make a low-profile backplate for the sound card, and another for the onboard NIC on the SBC and I'm good to go. Oh, and get a quieter fan for the PSU - with everything elses passively cooled, its noise is very noticeable.