ZX Spectrum 16K/48K edge connector: Difference between revisions
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====Video Outputs==== | ====Video Outputs==== | ||
Pin 15 on the lower side of the edge connector provides the same composite video signal that is fed into the UHF modulator. | Pin 15 on the lower side of the edge connector provides the same composite video signal that is fed into the UHF modulator. | ||
Lower pin 16 on the carries an inverted luminosity signal to use with the 'U' and 'V' signals provided on lower pins 18 and 17 respectively | Lower pin 16 on the carries an inverted luminosity signal to use with the 'U' and 'V' colour difference signals provided on lower pins 18 and 17 respectively |
Revision as of 16:28, 20 February 2012
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 |
Notes on Connections
Key Slot
The key slot ensures correct alignment of a peripheral with the edge connector. The slot occupies the pin 5 positions
Video Outputs
Pin 15 on the lower side of the edge connector provides the same composite video signal that is fed into the UHF modulator. Lower pin 16 on the carries an inverted luminosity signal to use with the 'U' and 'V' colour difference signals provided on lower pins 18 and 17 respectively