5 Sep
2007
5 Sep
'07
7:39 a.m.
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