PDP 11/05 - looking for help

Noel Chiappa jnc at mercury.lcs.mit.edu
Mon Feb 12 06:03:06 CST 2018

    > From: sop00000h

    > I read in somebodies note about jumpers @W1 and W2 on the M7261F that I
    > have. Apparently cutting one of these disables the onboard uart and
    > will allow me to put in a serial card.

Yes, W1. And it's not cutting, it's inserting.

    > I cant find the jumpers.

They aren't labeled, which does not help!

With the board component face up, and the contact fingers at the bottome, W1
is to the right of E69, and W2 is to the right of E73.

    > Nor can I find a print set. Any suggestions?

Of the 4 known sets of drawings for the -11/05, 3 are available online. This


gives the names, which should help you locate them (all are in BitSavers,


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