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

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