[Coco] Adventures in Pin Numbering

Salvador Garcia salvadorgarciav at yahoo.com
Thu Aug 25 11:47:35 EDT 2016

Mark, do you plan on making this adapter available sometime in the future? Thanks


      From: Mark J. Blair <nf6x at nf6x.net>
 To: CoCoList Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Thursday, August 25, 2016 1:25 AM
 Subject: [Coco] Adventures in Pin Numbering
So, I made this here fancy CoCo cartridge port breakout adapter, complete with overkill grounding ear connections:


Then I learned that Tandy and 3M don't agree about pin numbering on a card edge connector. 3M numbers their IDC ribbon card edge sockets to match the pin numbering of an IDC header on the same cable. Tandy, however, swaps the odd and even pins in the CoCo's documented cartridge port pin numbering.

I guess I'll be assembling version 2 in a couple of weeks.

Mark J. Blair, NF6X <nf6x at nf6x.net>

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