Thanks to Yerzmyey, the World of Spectrum boards have started a short discussion on the AY features for the ZX81 - see http://www.worldofspectrum.org/forums/s ... hp?t=37867
One of the questions was about how to play background music in games....
Over to SirMorris and Andy here....
Playing background music with AY Units
Playing background music with AY Units
Rich Mellor
RWAP Software
RWAP Adventures
SellMyRetro
Retro-Printer Module
Also Involved in:
Icephorm
RWAP Software
RWAP Adventures
SellMyRetro
Retro-Printer Module
Also Involved in:
Icephorm
Re: Playing background music with AY Units
Andy - what kind of time are we talking about to run a cycle of the player? Would there be any CPU left for game code? If necessary what would could be done to reduce the overhead?
Re: Playing background music with AY Units
Erm.... the Current STC player is approx on average around 2500 cycles so in slow mode that equates to around 1/4 of available program executuion time. Per tv FRAME.
PT3 player on the other hand averages around 6000 ! cycles....
So erm yeah use the STC if you can.
Andy
P.S of course you need a suitable interrupt handler to keep everything in sync
PT3 player on the other hand averages around 6000 ! cycles....
So erm yeah use the STC if you can.
Andy
P.S of course you need a suitable interrupt handler to keep everything in sync
what's that Smell.... smells like fresh flux and solder fumes...
Re: Playing background music with AY Units
Aaah that's better, I remember you were saying that sometimes the IRQs would overlap when playing PT3s.
I think I'm going to have to have a try
C
I think I'm going to have to have a try
C
- BrunoFlorindo
- Posts: 290
- Joined: Sat May 10, 2008 2:46 am
- Location: Anaheim, CA, USA
Re: Playing background music with AY Units
Back after a loooong time without a PC with internet connection. Glad to see the recent developments in AY hardware and software!
Still waiting to hear the Zeddy playing digital music.
Still waiting to hear the Zeddy playing digital music.
Re: Playing background music with AY Units
Hi Bruno nice to see You back again.BrunoFlorindo wrote:Back after a loooong time without a PC with internet connection. Glad to see the recent developments in AY hardware and software!
Still waiting to hear the Zeddy playing digital music.
I don't know why but I always thought You had a ZONX-81 unit amongst Your collection, if not then raid the cookie jar for a ZXpand and AY unit (or just the xpand with any ZONX type unit) and get creating.
Here's something I knocked up on the zeddie then mixed with guitar and a bit of Yamaha AWM.
The bass, drums, twiddly bits and melody line were all done on the 81 using Andy Reas' tracker.
It can be done honestly.
Regards.
Moggy.
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