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- 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.
- When the DUP TXCSR DEVICE_RESET bit is set, which clears the MAISEL bits, any existing tmxr loopback must also be removed.
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Thanks Mark. It looks like simh/simh@ac73e7b is also needed for all this to work. Is that right? |
These devices start disabled and will be that way in essentially all working systems, but there apparently was a DECnet Phase V support for this device, so it is added to all systems. The DPV should now be readily testable. As mentioned in #1152. That PR will fix the DUP device. This commit is explicitly released from any license restriction mentioned in the LICENSE.txt of the github.com/simh/simh master branch changes.
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The commits could have been digested with no ill effects to any build, but only the PDP11 (and PDP10) would have included @trevorwarwick modified DUP code since only those simulators included the DUP device. I have explicitly released the changes in the commit you reference from any of the previously discussed LICENSE.txt constraints on my future commits. |
This was referenced Jun 15, 2022
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This pull request contains the commits made by others (Trevor Warwick @trevorwarwick in particular) since the addition of the LICENSE.txt in the simh/simh master branch