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The DEUNA supports buffer chaining, an Ethernet frame can be stored in a set of chained buffers.
2.11BSD doesn't use this feature, it always uses buffers large enough for a maximal size Ethernet frame.
However, DEC OS use buffer chaining.
The current backend doesn't support buffer chaining. No problem with 2.11BSD.
But this limitation prevents usage of Ethernet connectivity in DEC OS.
The text was updated successfully, but these errors were encountered:
Several mode settings are also not implemented in w11
Mode bit SimH w11a comment
MODE_PROM yes yes PROM: promiscous mode
MODE_ENAL yes no ENAL: enable all mcasts
MODE_DRDC yes no DRDC: disable data chaining
MODE_TPAD yes part TPAD: tx message padding enable
MODE_ECT no no ECT: enable collision test
MODE_DMNT yes no DMNT: disable maintenance message
MODE_INTL yes no INTL: int loopback(DELUA)
MODE_DTCR no no DTCR: disable tx CRC
MODE_LOOP yes no LOOP: int loopback
MODE_HDPX no no HDPX: half-duplex (DEUNA)
The DEUNA supports buffer chaining, an Ethernet frame can be stored in a set of chained buffers.
2.11BSD doesn't use this feature, it always uses buffers large enough for a maximal size Ethernet frame.
However, DEC OS use buffer chaining.
The current backend doesn't support buffer chaining. No problem with 2.11BSD.
But this limitation prevents usage of Ethernet connectivity in DEC OS.
The text was updated successfully, but these errors were encountered: