I found an emulator for AY-3-8910 using an ATmega8: http://youtu.be/iarcYHJ6uFI. Link to the blogg is also in YouTube About.
I have a "William Stuart Systems Input/Output Port and Music Synthesiser for ZX81 and Spectrum" connected to my ZX81 and that uses AY-3-8910, see page 7 in http://df.lth.se.orbin.se/~mikaelb/sinc ... l_zx81.pdf.
I think the same chip is used in "ZON X-81 Programmable Sound Generator", see http://www.zx81stuff.org.uk/zx81/genera ... ONX81.html.
Using this project with ATmega8 one could probably build sound cards for ZX81. Unfortunately there doesn't seem to be any source code, but only hex-files.
AY-3-8910 sound card emulator using AVR ATmega8
AY-3-8910 sound card emulator using AVR ATmega8
Last edited by MOB-i-L on Mon Jun 02, 2014 9:45 pm, edited 1 time in total.
Started w/ BASIC on ABC80 & ZX81 then Forth, Z80… http://scratch.mit.edu/users/mobluse/ https://www.youtube.com/user/MOBiL4u/ https://twitter.com/mobluse/
Re: AY-3-8910 sound card emulator using AVR ATmega8
Well, it might be interesting if it's finished - and if anybody would adapt it to the ZonX ports.
The AY and YM chips will run out one day, so the idea is good.
As for the compatibility - obviously I'd have to listen to some my song from it, to really judge.
Anyway, the idea itself is OK.
The AY and YM chips will run out one day, so the idea is good.
As for the compatibility - obviously I'd have to listen to some my song from it, to really judge.
Anyway, the idea itself is OK.
IN NIHILUM REVERTERIS - a big text-adventure game for ZX81: http://tiny.pl/g2m6m
"MONOCHROME" issue 5 - (Spring 2014) free paper/PDF magazine about ZX81: http://tiny.pl/q2m44
ZX81 COMPETITIONS 2007/2009: http://zx81.republika.pl/
"MONOCHROME" issue 5 - (Spring 2014) free paper/PDF magazine about ZX81: http://tiny.pl/q2m44
ZX81 COMPETITIONS 2007/2009: http://zx81.republika.pl/