Connector:Expansion port

CPC Expansion Port

EXPANSION: 50 way Delta range.

1  Sound     2  GND
3  A15       4  A14
5  A13       6  A12
7  A11       8  A10
9  A9        10 A8
11 A7        12 A6
13 A5        14 A4
15 A3        16 A2
17 A1        18 A0
19 D7        20 D6
21 D5        22 D4
23 D3        24 D2
25 D1        26 D0
27 VCC       28 *MREQ
29 *M1       30 *RFSH
31 *IORQ     32 *RD
33 *WR       34 *HALT
35 *INT      36 *NMI
37 *BUSRQ    38 *BUSAK
39 READY     40 *BRST
41 *RSET     42 *ROMEN
43 ROMDIS    44 *RAMRD
45 RAMDIS    46 CURSOR
47 LPEN      48 *EXP
49 GND       50 CLK4

KC Compact Expansion Port

The KC Compact has 58pin, special-type connector

 1B  +12V (20mA max)              29B ............................. 1B
 1A  +20V                         29A ............................. 1A
 2B  Same as CPC Pin1     (SOUND)
 2A  Same as CPC Pin2     (GND)
 ..  Same as CPC Pin3..48 (see there)
 26B Same as CPC Pin49    (GND)
 26A Same as CPC Pin50    (4MHz)
 27B FBAS Video Output
 27A PIO /TEST          ;\
 28B Printer Bit1       ;
 28A Printer Bit0       ; for TEST mode (remote-network-boot)
 29B Printer /Strobe    ;
 29A Printer Bit6       ;/

Expansion Port on Aleste 520EX Expansion Port

The Aleste 520EX has a 62pin, male edge connector.

 A1..A25  Same as <odd>  CPC Pins 1..49 (ie. SOUND, A15, A14, etc.)
 B1..B25  Same as <even> CPC Pins 2..50 (except B20=NC, instead /BUSRESET)
 A26 MAP14     B26 MAP15
 A27 MAP16     B27 MAP17            A31___________________A1
 A28 MAP18     B28 MAPBLK             |___________________|
 A29 /INTA     B29 /DISP            B31                   B1
 A30 Agnd      B30 /CPU
 A31 Aucc      B31 HIGH

Most of the extra pins are DMA related. The Aucc/Agnd pins are meant to be smoother voltages then VCC/GND (for use with Audio expansions).

Amstrad PCW

The Amstrad PCW has a 50-pin Expansion port, too. But it's pin-outs are entirely different as on CPC.

• Amstrad PCW Expansion Port