BBC Micro User parallel Port pinout
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Pin Pin
(9 P) (25 P) PC BBC Pin
----- ------ -- --- ---
5 7 0V (Ground) Gnd (Ground) 1
2 3 RxD (Data in) -------------- TD (Data out) 2
3 2 TxD (Data out) -------------- RD (Data in) 3
1 8 DCD ---+---------- RTS 5
6 6 DSR ---+
4 20 DTR -------------- CTS 4
7 4 RTS ---+
8 5 CTS ---+
(The +'s mean that locally on the PC DSR has to be connected to DCD and that RTS has to be connected to CTS.)
Pin numbering
-------------
PC: BBC:
9-pin D-type or: 25-pin D-type 5-pin Domino DIN-plug
(male)
_____________ ______________ _____
\ 1 2 3 4 5 / \ 1 2 . . . . . 13 / / \
\ 6 7 8 9 / \ 14 15 . . . 25 / / 5 3 \
--------- ------------------- | 1 |
\ 4 2 /
\ /
-----
The views of these figures are all from the outside (the backs of the computers) into the sockets,
i.e. they show the wiring sides of the plugs.
Here is another one
http://www.rtrussell.e7even.com/products/bbcwin/manual/bbcwinf.html
BBC Micro PC
DIN Plug D25 Socket D9 Socket
pin A <