IBM PC Connecting to DECNET

Paul Koning paulkoning at
Fri Jun 3 07:50:30 CDT 2022

> On Jun 3, 2022, at 8:46 AM, Antonio Carlini via cctalk <cctalk at> wrote:
> ...
> It's predecessor, the DEQNA, was "Digital ETHERNET Q-Bus Network Adapter", according to its user guide, or "broken", according to most people :-)

Yup.  It went through 12 revisions, but even that last "rev L" didn't work, so DEC eventually gave up on it and produced the LQA.  Which was a bit of a struggle because some aspects of the QNA API are tied to the original silicon, and emulating them on a very different Ethernet chip is somewhat messy.  In particular that applies to the address filtering.


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