Date   : Sat, 09 Jul 2011 17:10:38 +0100
From   : jgh@... (J.G.Harston)
Subject: Mouse on the BBC

In order to link an old thread to the correct information, here are the
/correct/ mouse/user port pinouts:

   +5v  1 |  2  CB1 - Xaxis               / |                      / |
        3 |  4  CB2 - Yaxis              / 1| Yaxis               / 1| Xdir
    0v  5 |  6  D0  - Xdir         Left |6  |               Left |6  |
        7 |  8  D1                      |  2| Xaxis              |  2| Right
        9 | 10  D2  - YDir          +5v |7  |                +5v |7  |
       11 | 12  D3                      |  3| Ydir               |  3| Middle
       13 | 14  D4                   0v |8  |                 0v |8  |
       15 | 16  D5  - Left              |  4| Xdir               |  4| Ydir
       17 | 18  D6  - Middle      Right |9  |              Yaxis |9  |
       19 | 20  D7  - Right              \ 5| Middle              \ 5| Xaxis
      USER PORT                           \ |                      \ |
                                   AMIGA MOUSE PORT        COMPACT MOUSE PORT
                            Atari mouse swaps pins 1 and 4.

See http://mdfs.net/Info/Comp/BBC/Mouse

-- 
J.G.Harston - jgh@...