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From: Neil Cerutti <neilc@norwich.edu>
Newsgroups: comp.lang.python
Subject: Re: Number of languages known [was Re: Python is readable] - somewhat OT
Date: 3 Apr 2012 17:21:32 GMT
Organization: Norwich University
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On 2012-04-03, Dave Angel <d@davea.name> wrote:
> And I worked on a system where the microcode was in ROM, and
> there was a "patch board" consisting of lots of diodes and some
> EPROMs.  The diodes were soldered into place to specfy the
> instruction(s) to be patched, and the actual patches were in
> the EPROMs, which were reusable.  The diodes were the only
> thing fast enough to "patch" the ROM, by responding more
> quickly than the ROM.  This was back when issuing a new ROM was
> a very expensive proposition;  there were masking charges, so
> you couldn't reasonably do low quantities.

I worked on a system where the main interface to the system was
poking and peeking numbers at memory addresses.

-- 
Neil Cerutti