No, I meant that the board only has components on one side, unlike a few
custom through-hole boards I've seen, and more and more surface mount type
boards.
I wonder what CAD system they used to lay it out with.
--John
> -----Original Message-----
> From: cctalk-admin_at_classiccmp.org
> [mailto:cctalk-admin_at_classiccmp.org]On
> Behalf Of Sellam Ismail
> Sent: Sunday, January 19, 2003 09:07
> To: cctalk_at_classiccmp.org
> Subject: RE: Apple 1 schematics
>
>
> On Sun, 19 Jan 2003, J.C.Wren wrote:
>
> > Since this is a single sided board, as far as components go, the
>
> I assume you mean single layer?
>
> > bottom side would be easy. Scan it. The top side would be
> harder, but
> > given that the majority of the parts are .3" wide, with the
> schematic, a
> > lot of the routing can be inferred. And while I haven't
> looked closely
> > at an Apple I board, the trace widths should be pretty
> wide, by todays
> > standards. So by doing an overlay, and perhaps using some
> bright lights
> > for manual verification, it seems that very near replica
> could be made.
>
> Check out these photos:
>
> http://vintage.org/special/apple-1/apple-1-front.jpg
> http://vintage.org/special/apple-1/apple-1-rear.jpg
>
> >From the front photo you can see that the connecting traces are very
> tight. However, within proximity of the ICs, they are
> inferable, but it's
> not always obvious. I know this because I've looked at an
> Apple-1 a few
> times and pondered how challenging it would be to discern the traces
> undeather sockets. If you look at the socket on the far left of the
> board, right above the Apple Computer 1 wording, you'll see
> what most (if
> not all) of the sockets on the board look like. There's no way to see
> underneath without removing the socket.
>
> All that being said, I imagine with a close scrutiny of the board and
> cross-referencing it with the schematics, one can acrruately make the
> necessary inferences.
>
> Sellam Ismail Vintage
> Computer Festival
> --------------------------------------------------------------
> ----------------
> International Man of Intrigue and Danger
http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com
*
Received on Sun Jan 19 2003 - 09:39:00 GMT
