ZX-Spectrum +3 printer connector

The ZX-Spectrum +3's printer connector. Notice that the AMSOFT PL-1 printer interconnecting lead is required if you wish to use Centronics compatible printers other that Amstrad DMP range of printers.

Printer connector 
 17  16  15  14  13  12  11  10   9   8   7   6   5   4   3   2   1
  .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-.
|^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^|^^^^^^^^^^^^^^^^|
|____________________________________________________|________________|
  `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-' `-'
  35  34  33  32  31  30  29  28  27  26  25  24  23  22  21  20  19

                          (viewed from rear)
PIN FUNCTION PIN FUNCTION
1 STROBE 19 GND
2 D0 20 GND
3 D1 21 GND
4 D2 22 GND
5 D3 23 GND
6 D4 24 GND
7 D5 25 GND
8 D6 26 GND
9 D7 27 not used
10 not used 28 GND
11 BUSY 29 not used
12 not used 30 not used
13 not used 31 not used
14 GND 32 not used
15 not used 33 GND
16 GND 34 not used
17 not used 35 not used
18 does not exixt 36 does not exist

Source: [The Hardware Book]

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