I picked up a bare-bones PDP-11/23 a few weeks ago and it had this strange quad size card in it. Seems to allow another dual size card to be inserted into it.
https://w2hx.com/?prefix=x/What-Is-It/PDP-11-Thing/Board1/
For other pictures of this thingy, you can see here:
https://w2hx.com/?prefix=x/What-Is-It/PDP-11-Thing/
It also seems to have a floppy (RX02) controller card made by Charles River Data Systems (CRDS) called FC-202.
Any info on the board in the first link would be immensely appreciated!
73 Eugene W2HX
https://w2hx.com/?prefix=x/What-Is-It/PDP-11-Thing/Board1/
For other pictures of this thingy, you can see here:
https://w2hx.com/?prefix=x/What-Is-It/PDP-11-Thing/
It also seems to have a floppy (RX02) controller card made by Charles River Data Systems (CRDS) called FC-202.
Any info on the board in the first link would be immensely appreciated!
73 Eugene W2HX