KIM BUS -- coincidence

From: Ethan Dicks <>
Date: Thu Feb 24 00:32:53 2005

On Wed, 23 Feb 2005 22:05:32 -0800 (PST), Scott Austin
<> wrote:
> As most of you know (or if you look closely at the various photos on
> the web) the Kim-1 has 2 edge connector areas ("A" and "E"). Each side
> (top and bottom) of each edge connector has 22 contacts (i.e. 44 on the
> A connector edge and 44 on the E connector edge).

Yes... that's a common edge connector size from the day... it's
identical to the cartridge port on a VIC-20, among other machines.

> Sorry, it doesn't easily add up to 100 any which way.

I must have missed something, but why are you expecting it to add up
to 100? Are you thinking of an add-on product that the KIM-1 sits in
the top slot of that adds S-100 slots to the KIM? If so, the
backplane itself handles the necessary conversions of KIM (6502)
signals to S-100 signals, mostly just getting A0-A15, D0-D7 to the
right pins, but possibly making the read/write signals work between
the two types of interfaces, etc.

It _does_ let you use S-100 cards with a KIM-1, but that doesn't mean
that the KIM-1 is S-100 natively. Apologies if I've misunderstood the
nature of your 100-pin confusion.

Received on Thu Feb 24 2005 - 00:32:53 GMT

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