18 Nov
2021
18 Nov
'21
11:22 p.m.
Well... RSX for example can talk DDCMP over DZ11 or DL11 lines just as
well, which are plain simple serial lines existing in simh.
Hopefully such lines can be connected with interfaces doing DDCMP in
hardware (simulated in simh of course), and it should all work.
And any software running in RSX just have an interface that gives the
DDCMP packet layer. The actual serial lines are not accessible as such
by any other software than the DDCMP driver.
Johnny
On 2021-11-18 23:01, R. Voorhorst wrote:
Point in this case is that the ddcmp is handled in
Simh and not in system software so software can only deal with packets/messages; there is
need for a simh sync line where the software itself will be able to communicate in
bytes/characters and synthesize the packets/messages as the next higher organization.
Reindert
-----Original Message-----
From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of
Johnny Billquist
Sent: Thursday, 18 November, 2021 22:39
To: hecnet at Update.UU.SE
Subject: Re: [HECnet] ANF10 network --> DN200 (RJE, Decnet) --> should be Ddcmp
Well, a serial line over which DDCMP is running is purely a packet based interface.
Johnny
On 2021-11-18 21:46, R. Voorhorst wrote:
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Indeed it is Ddcmp, but the meaning is the
difference between
packet/message oriented and character oriented and the latter should also exist.
Reindert
-----Original Message-----
From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On
Behalf Of Robert Armstrong
Sent: Thursday, 18 November, 2021 21:11
To: hecnet at Update.UU.SE
Subject: RE: [HECnet] ANF10 network --> DN200 (RJE, Decnet)
Paul Koning <paulkoning at comcast.net>
wrote:
They speak DDCMP, yes, but not DECnet. Any protocol layered over
DDCMP
should work.
Indeed, and we just proved that with ANF10 which uses the DMCs and
DUPs but is not DECnet.
Bob