The PCW expansion port contains the following signals:

^  Component face  ^^^  ^  Tracks face  ^^^
^ Signal ^ Type ^ Numbering ^ ^ Numbering ^ Signal ^ Type ^
| NC     |       |   1 | | 2  | NC*   |       |
| GND    |  O    |   3 | | 4  | GND   |  O    |
| +5V    |  O    |   5 | | 6  | +5V   |  O    |
| NC     |       |   7 | | 8  | +12V  |  O    |
| A14    |  I    |   9 | | 10 | A15   |  I    |
| A12    |  I    |  11 | | 12 | A13   |  I    |
| A10    |  I    |  13 | | 14 | A11   |  I    |
| A8     |  I    |  15 | | 16 | A9    |  I    |
| A6     |  I    |  17 | | 18 | A7    |  I    |
| A4     |  I    |  19 | | 20 | A5    |  I    |
| A2     |  I    |  21 | | 22 | A3    |  I    |
| A0     |  I    |  23 | | 24 | A1    |  I    |
| D6     |  I/O  |  25 | | 26 | D7    |  I/O  |
| D4     |  I/O  |  27 | | 28 | D5    |  I/O  |
| D2     |  I/O  |  29 | | 30 | D3    |  I/O  |
| D0     |  I/O  |  31 | | 32 | D1    |  I/O  |
| /RESET |  O    |  33 | | 34 | /M1   |  O    |
| /BUSRQ |  I    |  35 | | 36 | /INT  |  I    |
| /BUSAK |  O    |  37 | | 38 | /WAIT |  I    |
| /WR    |  O    |  39 | | 40 | /MREQ |  O    |
| /RD    |  O    |  41 | | 42 | /IORQ |  O    |
| NC     |       |  43 | | 44 | NSYNC |  O    |
| /MDIS  |  I    |  45 | | 46 | VIDEO |  O    |
| 32MHz  |  O    |  47 | | 48 | 4MHz  |  O    |
| GND    |  O    |  49 | | 50 | GND   |  O    |

* On the PCW10, signal 2 is /NMI.