Reproducing old machines with newer technology
paulkoning at comcast.net
Tue Jul 14 15:35:36 CDT 2015
> On Jul 14, 2015, at 3:55 PM, William Donzelli <wdonzelli at gmail.com> wrote:
>> ...I/O processors.
> I do not think you can claim that the 6600 I/O processors were all
> that new. Many (most?) of the 1960s mainframes before the 6600 had
> channel controllers.
Sure, but channel controllers and PPUs are very different beasts. You can’t run your OS on a channel controller, which is exactly what Cray did on the 6600. Nor can you implement the entire operator user interface on a channel controller, as was done in the DSD PPU program.
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