another demo...

[Andy Rea]

As some of you ( well those that went to Mahlerts this year ) you may of seen my latest demo for 16K ZX81 with Zon-X

it is a tribute to Bob Smith Who In my humble opinion has since the era of 3d monster maze written the best games for our humble machines.

Game graphics by Bob Smith, Music by Yerzmyey, coding by MadAxe (me)

regards Andy

SDEMO.P

here ya go....

(15.89 KiB) Downloaded 345 times

[sirmorris]

Wooooowoooo!!

[kmurta]

Fantastic!!!!!

[zsolt]

Fantastic!!!!!

yes and cacophonous (a little bit )

[yerzmyey]

Yupp, the method to simulate SID on AY isn't perfect yet and probably never will be.
There are still very tiny disharmonies on the "SID-like" generator and they comprise a hardware feature of YM/AY chip.

The SID-like instrument isn't stable and it need the second channel as an additional stabilization. It works but sadly not often. In the newest song, for Spectrum 16K, I made it much better but still one note was simply impossible to tune-up, even with a 'stabilization' in a second channel. Finally I had to make it shorter and to fill the lack with a standard square wave. It's uglier but no disharmony there.
Hmm.

After all, 99% of people plays only standard sounds on YM/AY, which is boring to me, and I'm actually the only person who tries to force AY to play in a more interesting way (not to sound like a door-bell ).
One time it works, in another - it suxx.

Of course one could say that we could connect SID to ZX81 but the truth is, AY and YM were inseparably related with Sinclair computers from the very beginning, so I state - we should stay with the original chip from original ZonX.

Hereby I officially apologize the ZX81 community for any past and future cacophony.

[sirmorris]

Haha bring it on, that's what I say

[zsolt]

Sorry Guys,

sorry,sorry,sorry:

Fantastic!!!!!

yes and cacophonous (a little bit )

I tested this demo on the "old EO" (v1.0a - i don't have sound card ) and just noticed (when i tested some soundeffects for the rescue80), there are problems in the sound emulation . Then i tried with this improved version (by sirmorris) and now it sounds much better.
Happy new year,
Zsolt

[yerzmyey]

Well, I never trust the sound in ZX81 emulators, so I assumed nobody would even try to use those progs for the sound, haha.

Another thing is - I wonder why it that. There are some good AY procedures, supposedly available to use & implement in own programs. If I recall, it was the UnrealSpeccy's emulator case.

Also, there might be some accessible libraries from AY_EMUL by Sergiey Bulba. It's AY emulation is 99,99% close.