The expansion port on PCWs sold in the US is a 50-position female Amphenol connector. On UK models, it is a simple edge connector (concealed underneath a plastic cover on PCW10s).
Edge connector layout, looking from the rear:
Top
N/C ( 1) [] (2) N/C
0v ( 3) [] (4) 0v
+5v ( 5) [] (6) +5v
N/C ( 7) [] (8) +12v
A14 ( 9) [] (10) A15
A12 (11) [] (12) A13
A10 (13) [] (14) A11
A8 (15) [] (16) A9
A6 (17) [] (18) A7
A4 (19) [] (20) A5
A2 (21) [] (22) A3
A0 (23) [] (24) A1
D6 (25) [] (26) D7
D4 (27) [] (28) D5
D2 (29) [] (30) D3
D0 (31) [] (32) D1
RESET (33) [] (34) M1
BUSRQ (35) [] (36) INT
BUSAK (37) [] (38) WAIT
WR (39) [] (40) MREQ
RD (41) [] (42) IORQ
N/C (43) [] (44) NSYNC
MDIS (45) [] (46) VIDEO
3.2 MHZ (47) [] (48) 4 MHZ Z80 clock
0v (49) [] (50) 0v
[[Category:PCW]]