IBM PC Connecting to DECNET

Paul Koning paulkoning at
Wed Jun 1 08:50:44 CDT 2022

> On Jun 1, 2022, at 5:53 AM, Warner Losh via cctech <cctech at> wrote:
> ...
> I believe the DEPCA was based on the venerable
> SONIC chipset, but it may have been the LANCE. It wasn't NE-2000 compatible
> (that came later) :). 

LANCE seems plausible, or perhaps one of the later chips designed by DEC Jerusalem (SGEC etc.).  What's a SONIC?

The non-LANCE non-DEC Ethernets I remember are in the DEUNA (no idea what), QNA (Fujitsu???) and CNA (Intel 82586, *groan*).  The LANCE was designed well, with a fair amount of DEC input, and the subsequent internally produced chips were constructed along similar lines.  Once DEC learned  how to make them at not quite insane cost, they became a very good choice and were generally used in DEC products.


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