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Unknown DD01 chassis
- Thread starter antiquekid3
- Start date
vrs42
Veteran Member
DD01 UDC Control and Interface
Whatever that means. It's mentioned in the ECO log:
Vince
Whatever that means. It's mentioned in the ECO log:
Vince
vrs42
Veteran Member
A skim of the PDP-11 version of the manual makes it seem like a kind of GPIO expander for up to a couple hundred words of I/O.:
Maybe a more detailed read will be needed
.
Vince
Maybe a more detailed read will be needed
.Vince
vrs42
Veteran Member
Looks like CHM has a manual:
www.computerhistory.org
Vince
PDP-11, VAX, DECmate, and other manuals | 102748555 | Computer History Museum
Vince
jackrubin
Veteran Member
mmm ... looks familiar
antiquekid3
Veteran Member
Hmm...indeed!
antiquekid3
Veteran Member
Very interesting finds, Vince! Thank you! Maybe Al can scan that manual at some point so I can see if there are interesting things that can be done with this chassis.
vrs42
Veteran Member
See also page 7-53 through 7-56 of the e/m/f Small Computer Handbook (1973). Page 7-207 in the 1972 edition. 7-122 in the 1971 edition.
Vince
Vince
antiquekid3
Veteran Member
Roland Huisman
Veteran Member
So this will be a Xmas tree light project next level?
vrs42
Veteran Member
Something about 3072 digital I/Os reminds me of an old quote about 64K RAM being enough for anyone.
Vince
Vince
antiquekid3
Veteran Member
Or maybe controlling every pipe of an organ to recreate Unplayed by Human Hands!
vrs42
Veteran Member
Do you have any DD02 to go with it? If not, you may be restricted to 16 12 bit words, if I understand correctly the manual that Al scanned. There are apparently quad height boards that go in there to provide 12 bits of either input or output. I only see the first four slots implemented there, though.
Also, if those are M623 in C1 and D1, it is the Posibus version.
Do you have any of the screw terminal assemblies to go with it? How about the funky boards with the 2 sockets on top or the ones with two edge connectors to go in them?
Vince
Also, if those are M623 in C1 and D1, it is the Posibus version.
Do you have any of the screw terminal assemblies to go with it? How about the funky boards with the 2 sockets on top or the ones with two edge connectors to go in them?
Vince
antiquekid3
Veteran Member
Seems I'm missing the I/O and filter assemblies, but those shouldn't be hard to recreate. But yes, this is definitely the Posibus version.
192 bits would be plenty to control a two-manual organ, but you could control one more efficiently (and thus a much larger organ) with some extra circuitry. I'm still trying to understand more about how Prentiss Knowlton interfaced his PDP-8 to the organ back in the day.
192 bits would be plenty to control a two-manual organ, but you could control one more efficiently (and thus a much larger organ) with some extra circuitry. I'm still trying to understand more about how Prentiss Knowlton interfaced his PDP-8 to the organ back in the day.
jackrubin
Veteran Member
Prentiss Knowlton – Instructor | UCLA Extension
Learn about Prentiss Knowlton, an instructor at UCLA Extension. Discover Prentiss Knowlton’s background, expertise and more.
www.uclaextension.edu