> From: Henk Gooijen > As far as my limited PDP-11 knowledge goes, none of them used > handshake.
I'm pretty sure this is true of all the ones that had a hardwired serial console - it's definitely true of the 11/23 and J11 chip ones (/73, etc), and probably the 11/03's too (although it's been 30+ years since I used one of those, so don't hold me to that :-). > So, Rxd, TxD and GND is all you need to connect. Errq, many of them _require_ a loop-back between a pair of pins on the Berg/DuPont connector to operate - this is true of the DL11 (M7800 - UNIBUS), DLV11 (M7940 - QBUS), DLV11-J (M8043) and 11/23+, for instance), and probably the 11/83-84 too. So just connecting up R, X, and Gnd alone won't do it. > Also, common (?) is *no* parity. That, and number of bits, I have no idea about - we always changed things to our local standard (8 bits, no parity, 2 stop bits, IIRC) straight away. Best to check the hardware, and see what it's set to, and either set it to what you're using, or change what you're plugging into it to match. Noel