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open-simh.simh/PDP11
Trevor Warwick b41acb30c1 PDP11, Qbus & Unibus VAX: Extend DUP device for DECnet Phase V support
- This involves adding some trailing characters to received DDCMP frames
  to meet host driver expectations (simulation then behaves more like a
  real synchronous device). 1 SYN is enough for VMS, but RSX needs a few
  when there is no abutting frame.
- The VMS driver implements the CRC performance option in section 5.1.2
  of the DDCMP spec., and thus relies on receiving a valid character after
  the CRC on a received frame.
2022-05-16 18:18:26 +01:00
..
2018-09-10 15:13:06 +02:00