[HECnet] DU11 vs. DUV11

[Johnny Billquist]

On 2013-01-06 21:28, John Wilson wrote:
From: Johnny Billquist <bqt at softjar.se>

You must be talking of the PDT-11/150 then. The /110 and /130 sat inside
a VT100 shell. Extremely similar to a VT103 (I actually never figured
out what the difference between a VT103 and a PDT-11/130 is.)

I may be grossly misinformed, but my understanding is that although the
/110 and /130 both live inside a VT100, they're *not* like VT103s, and
have no Q-bus but use a custom CPU board just like the /150 (I doubt it's
the exact same board, but a similar design).

I could have sworn the 110/130 manual on bitsavers (which is misfiled
away from the 150 manual -- I forget where) said so but on a quick skim I
can't find it.   The I/O hardware has enough programming differences that
it can't be regular Q-bus stuff, although I suppose they could have made
a whole set of PDT-specific boards.

You know, I had never even thought that thought, but now that you mention it, it makes total sense. I think you must be right.
All the PDT-11 use the same system board. It's not a Qbus at all, in any of them.
That definitely also makes it very different from the VT103.

Thanks for making me understand this. :-)

	Johnny

-- 
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