evil_nic
typhoid This is a mysterious value that can be written to CSR11 in the 21040 (only) to support a pre-NWay full-duplex signaling mechanism using short frames. No one knows what it should be, but if left at its default value some 10base2(!) packets trigger a full-duplex-request interrupt.
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The old DEC databooks were light on details.
The 21040 databook claims that CSR13, CSR14, and CSR15 should each be the last
register of the set CSR12-15 written. Hmmm, now how is that possible?
001201
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