AY sound issue with Just Speccy 128k

For experts to discuss very technical stuff and newbies to ask why the Spectrum they bought off ebay doesn't work.
User avatar
Posts: 105
Joined: Wed Nov 15, 2017 2:52 pm
Location: Sunny Somerset in the U.K. in Europe

Re: AY sound issue with Just Speccy 128k

Post by 1024MAK » Mon May 14, 2018 1:56 pm

Do you have, or have access to a logic probe or an oscilloscope, or maybe a logic analyser?

If yes, then it should be possible to determine if the system is trying to write data to the AY chip.

If you have a multimeter, you can test the power supply pins of the AY chip.

0 x

Posts: 7
Joined: Mon May 07, 2018 3:04 pm
Location: Staffordshire, UK

Re: AY sound issue with Just Speccy 128k

Post by Toki » Wed May 16, 2018 9:33 am

Yeah, I do have a multimeter.

I was going to have a look over the board at the weekend and get the multimeter on it to see if I could spot anything, but the battery has gone in the multimeter.

*sigh* nothing is ever simple!
0 x

Post Reply