EightyOne and the AY
Re: EightyOne and the AY
The problem with the ZonX isn't the hardware, it's that the hardware has no software. At all. Nobody's written any. Whatever hardware you make you'll still have to make the software so you may as well make it ZonX compatible too, as it'll just be a matter of changing port numbers. It would be cool to make some software for it, though, a simple tracker-esque thingy would be great.
EightyOne's AY emulation works fine as long as you don't touch the coarse registers, so you can only get the higher octaves. The "hymne" is all done using the fine register, so it plays perfectly.... but as soon as you touch the coarse register it all goes horribly wrong. Unfortunately writing a trackery program will be a nightmare without a working emulator....
EightyOne's AY emulation works fine as long as you don't touch the coarse registers, so you can only get the higher octaves. The "hymne" is all done using the fine register, so it plays perfectly.... but as soon as you touch the coarse register it all goes horribly wrong. Unfortunately writing a trackery program will be a nightmare without a working emulator....
Ian Gledhill
http://www.mutant-caterpillar.co.uk/shop/ for all your retro-computing needs (especially Sinclairs!)
http://www.mutant-caterpillar.co.uk/shop/ for all your retro-computing needs (especially Sinclairs!)
Re: EightyOne and the AY
I would like to report that HYMNE still doesn't work on EightyOne with ZonX and these two games mentioned above work on AY perfectly.kmurta wrote:Two games that make use of zonx81:
http://www.zx81.megahospedagem.com.br/f ... cosmic.zip
http://www.zx81.megahospedagem.com.br/f ... unar10.zip
enjoy
Kelly Murta
Something's still wrong... Hm.
PS: Great games, btw.
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/
Re: EightyOne and the AY
Can someone please remind me of the names of those two games?
Didn't some of the QS releases feature support for sounds?
Didn't some of the QS releases feature support for sounds?
Rich Mellor
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- BrunoFlorindo
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Re: EightyOne and the AY
If memory serves correct, QS's Defenda (Defender?) has optional AY sounds but you need the QS sound board to be able to hear them. :p I think EightyOne includes this game and emulates this board.
Re: EightyOne and the AY
Those 2 games did not work with my real ZONX81. My ZXON8-box uses the i/o addresses $1F and $DF, while those games use the addresses $0F and $CF. So I didn't have any soundkmurta wrote:Two games that make use of zonx81:
http://www.zx81.megahospedagem.com.br/f ... cosmic.zip
http://www.zx81.megahospedagem.com.br/f ... unar10.zip
But I cut the A4 address line in my ZONX81, and now it works
Siggi
My ZX81 web-server: online since 2007, running since dec. 2020 using ZeddyNet hardware
http://zx81.ddns.net/ZxTeaM
http://zx81.ddns.net/ZxTeaM
Re: EightyOne and the AY
Spirantho wrote: except the three people in the world with a ZonX setup?
Actually, it might be about to change.
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/
Re: EightyOne and the AY
Are the expansion connector pinouts the same ? or close enough that it will work ? I didn't think they where, though even if they where not should be easy enough to knock up an adapter board.Spirantho wrote:I would say very little would need changing. You might be able to stick a crystal on the board the so the timing would be the same between the '81 and the Speccy 128K. Everything else should just about work anyway - after all the ZonX works on Speccy and ZX81.
When I have time I'll take a look at the EightyOne source if the I/O details are in there. Mess has an implementation of the AY, so hacking ZonX / QS sound support into the ZX81 driver should be reasonably easy to do.It's a shame Mike has stopped on EightyOne - I even mailed him but it bounced. Maybe I should take a look at the source but there's no project file there and it's a bit strange. We do need an emulator with working ZonX support, though! Otherwise nothing will ever use it!
Cheers.
Phill.
Re: EightyOne and the AY
Don't forget that SirMorris is looking into the possibility of adding an AY daughterboard to the ZXpand
Rich Mellor
RWAP Software
RWAP Adventures
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Re: EightyOne and the AY
Yeah I was thinking about that erlier, it should be possible to make a piggy back board for the rom socket with an AY in it, shouldn't require much additional logic as I believe he already has the address decode for it. You'd prolly need to put an audio amp on there too, an LM386 or something like that would prolly do the trick, unless the AY has enough output power to drive a set of amplified (PC type) speakers.RWAP wrote:Don't forget that SirMorris is looking into the possibility of adding an AY daughterboard to the ZXpand
Mind it wouldn't fit in the Memotech case then tho.
Cheers.
Phill.
Re: EightyOne and the AY
The zxpand had zon-x decoding built in to the IO decoding logic in its GALs. There is a daughter board design almost ready, it will be properly announced within the next couple of weeks or so. Honestly, you enthusiasts. Can't you just wait for the proper announcement?
I've also busted open the EO development VM today. I'm integrating the ZXpand emulation DLL which has a little way to go but should at least allow some work on the zx80 ROM... I'm aware that there's a bug with the coarse tuning register and if anyone wants to help with that then I'll see what can be done. Mike is off the scene at the moment so any fix would be 'unofficial'.
C
I've also busted open the EO development VM today. I'm integrating the ZXpand emulation DLL which has a little way to go but should at least allow some work on the zx80 ROM... I'm aware that there's a bug with the coarse tuning register and if anyone wants to help with that then I'll see what can be done. Mike is off the scene at the moment so any fix would be 'unofficial'.
C