Here’s a complete printset of the Venus Ibox, from 1984. It includes Ibox block diagrams, module and MCA block diagrams, and schematics for the MCAs and modules.

I’d bet my bottom dollar that there were ECOs after this version. But this hardware ran VAX/VMS and oodles of software.

Most of the page tops are faded. 75% of it is due to fading in the originals, and 25% is due to less-than-meticulous copying by FedEx.

Venus Ibox 1984-08-18

Here are two revisions of the Venus System Development Plan.

• Revision 2, dated 13-June-1980.
• Revision 4, dated 16-September-1982.

I have Revision 3, but didn’t think it was worth having it scanned.  Just imagine the average of revisions 2 and 4.

DEC archeological junkies will note the different names on the sign-off page. (Page vii in both documents.)

Prodded by comments on my two recent DEC posts, I dug some specs out of the dungeon and had them scanned.

Here’s the set of internal design specs for the VAX-11/750, a.k.a. Comet.