Connecting a AY-3-8910 for a ZX Spectrum 128k clone

A place to discuss the ZX80's and ZX81's younger brother - the Sinclair ZX Spectrum
McKlaud
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Joined: Tue Dec 19, 2017 10:02 pm
Location: St Albans, UK

Re: Connecting a AY-3-8910 for a ZX Spectrum 128k clone

Post by McKlaud » Fri Nov 29, 2019 12:00 am

@alcid34: I've looked very briefly on your schematic and A9 of AY-8-8910 is not connected anywhere. A9 must be kept low, otherwise the AY chip will ignore any address request. Any input designated as TEST should be left open (i.e. floating).
Claudius
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