Wang 300 Calc

[Lawrence Wilkinson]

On Tue, 2007-09-04 at 22:40 -0700, Chuck Guzis wrote:

> There was a paper/mylar-based capacitive ROM used for high-speed 
> applications on some 60's computers.  Basically, you did the same 
> thing--punched holes where you wanted 1's.

Totally unrelated to the topic at hand, but see
http://www.ljw.me.uk/ibm360/photos/ for an example of a "CCROS" card.

If you go to the 360/30 Links page, there are some IBM papers on how
these things work.

Yes, you punch these on a standard punch; this is how microcode updates
or patches were done.
-- 
Lawrence Wilkinson                                 lawrence at ljw.me.uk
The IBM 360/30 page                       http://www.ljw.me.uk/ibm360