Thanks for the detailed explanation - I totally get it now. I'll wait until you verify the board and post the gerber before ordering a set. I typically have an order or two open with JLCPCB at any given time - for just about every order, it's exactly 10 days from the time I click the purchase button before the blue box shows up in my mailbox, and that's with the cheapest shipping option. I'm not in a hurry to try it out, but if I was, I would probably just mill a prototype board on my CNC.
Regarding the 4-wire connector... I'm happy to just solder the ground wire directly to the REXCPM, though I'm sure most normal people would prefer to have it on a connector. //Ken S. ________________________________ From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Brian K. White <bw.al...@gmail.com> Sent: Thursday, September 14, 2023 10:16 PM To: m100@lists.bitchin100.com <m100@lists.bitchin100.com> Subject: Re: [M100] rexcpm battery On 9/14/23 21:27, Brian K. White wrote: > But somehow there is power differential between gnd and vmem (or > whatever the positive side of the big cap is, I say vmem because > obviously it powers the sram) on the rexcpm, and 0.7uA of current > flowing along RAM_RST. 7uA not 0.7uA! -- bkw