ZX Spectrum 16K/48K edge connector
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Lower | Upper | ||
---|---|---|---|
A14 | 1 | 1 | A15 |
A12 | 2 | 2 | A13 |
+5v | 3 | 3 | D7 |
+9v | 4 | 4 | NC |
SLOT | 5 | 5 | SLOT |
0v | 6 | 6 | D0 |
0v | 7 | 7 | D1 |
!CK | 8 | 8 | D2 |
A0 | 9 | 9 | D6 |
A1 | 10 | 10 | D5 |
A2 | 11 | 11 | D3 |
A3 | 12 | 12 | D4 |
!IORQULA | 13 | 13 | !INT |
0v | 14 | 14 | !NMI |
VIDEO | 15 | 15 | !HALT |
!Y | 16 | 16 | !MREQ |
V | 17 | 17 | !IORQ |
U | 18 | 18 | !RD |
!BUSRQ | 19 | 19 | !WR |
!RESET | 20 | 20 | -5v |
A7 | 21 | 21 | !WAIT |
A6 | 22 | 22 | +12v |
A5 | 23 | 23 | -12v |
A4 | 24 | 24 | !M1 |
!ROMCS | 25 | 25 | RFSH |
BUSACK | 26 | 26 | A8 |
A9 | 27 | 27 | A10 |
A11 | 28 | 28 | NC |
Key Slot
The key slot ensures correct alignment of a peripheral with the edge connector. The slot occupies the pin 5 positions