Pinouts of Connectors

ZX Spectrum AY-3-8912 connector pinout

layout
schematic diagram
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The AY38912 sound chip can be found on the Spectrum 128, +2 and +3 computers

UNKNOWN connector  at the computer
Pin Name Description
1 SOUND C Sound C (Can be tied together with A & B)
2 PORT ?
3 VCC +5 VDC
4 SOUND B Sound B (Can be tied together with A & C)
5 SOUND A Sound A (Can be tied together with B & C)
6 GND Ground
7 PORT ?
8 PORT ?
9 PORT ?
10 PORT ?
11 PORT ?
12 PORT ?
13 PORT ?
14 CLOCK ?
15 CLOCK ?
16 RESET Reset
17 A8 Address 8?
18 BDIR ?
19 BC2 ?
20 BC1 ?
21 D7 Data 7
22 D6 Data 6
23 D5 Data 5
24 D4 Data 4
25 D3 Data 3
26 D2 Data 2
27 D1 Data 1
28 D0 Data 0

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Pinouts.ru > Different motherboard connectors pinouts >  Pinout of ZX Spectrum AY-3-8912 connector and layout of connector

Source(s): ZX Spectrum FAQ, from Hardware Book
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