I recently decided to build myself a couple of Mike Willegal's Brain Boards for Apple II. For those unfamiliar with them, it's a slot card which can be used for things like running integer basic or the Wozaniam pack (which mimics Apple-1 including cassette interface).
Using Osmond, I was able to revise the PCB to include Macnoyd's hardware modifications from that thread. DIP2 is now used to select the upper or lower half of the ROM, and then once you have selected that 1/2 of your ROM, the normal Brain Board documentation applies. The only difference in the BOM is one additional 10K pull-up resistor located at R8. I would recommend anyone curious review the documentation "Brain Board with Wozaniam Pack Assembly and Operations Guide By Mike Willegal www.willegal.net version 5.1" PDF available from Mike's site before embarking on this build. Here is a side by side image of the original design and the updated one:
At this time I'm not offering full kits but if there is interest in some I may be willing to consider pre-packaging some ready-to-build kits.
A small run of ENIG PCBs cost me more than I figured per PCB, but ultimately it was worth it over HASL. I have built two of them and overall I'm happy. Before offering these anywhere else, I wanted to offer them to AppleFritter Members.
Bare PCBs are available in Purple solder mask and ENIG finish for $12 per PCB plus $4 US shipping (first class package tracked). I also have just a couple of the original design in cheaper HASL if you really want them, for $5 each. I accept paypal as goods and ship to your confirmed address on the payment, as this gets me the best postage rates and I pass the savings along. Inquiry via PM please.
This is an open source project under GPL and as such you are more than free to fabricate or even sell these yourself :) The ROM is shared with permission of Macnoyd, who I am most grateful to. If you would like to download the gerber files, Osmond file, Concatenated ROM, or just read more about this, I have a thread here: https://68kmla.org/bb/index.php?threads/reviving-mike-willegals-brain-board-for-apple-ii-computers.42152/page-2
Thank you for reading and cheers!