Calvin Allett wrote:
> I`ve been wondering this before, in relation to the Mayhem
> accelerator, as if wanting to write a game to run at 20Mhz
> (about four times normal speed with uncontended RAM?)
> then if I`d be able to run an intterupt music player, but have
> the player altered to only play the music every 4th frame,
> to keep tune at correct speed approx?
`Interrupts aren't affected by the speed of the machine.
`
`The ASIC generates the frame interrupt every 50th of a second, it's all
`tied
`right into the video timings. So things like music players, or any
`frame
`interrupt (or line interrupt) routines don't need to be changed at all.
I knew that I was possibly talking crap :D I should have realised actually,
so that`s really cool, so you still get your 50 interrupts, but
just more you can do between them.
> Oh, and while I`m rambling, does anybody know if there exists
> an interrupt player for AY music, or just players to incorporate
> into MC?
`I don't recall seeing any standalone interrupt players to play AY
`music,
`although Cookie and Stefan have in the past written patches into the
`various
`128K demos they both converted to play the music through the SAA1099 so
`they've done the main bit of work of converting AY register data into
`the
`nearest equivalent for the SAA.
`
I used to love these demo`s, and the converted games, as I still
usually prefer AY music over The Sound Machine, or E-tracker, although
some SAM tunes blow the AY away :) I was thinking it might be easier
to get someone to do a tune or two for games, if I needed an AY tune
over an SAA.... as the scenes bigger.
-------
`
`Could be a bit more tricky if you are meaning to play .AY files, which
`are
`essentially the speccy machine code player and the data.... that would
`need
`the machine code part (which I guess is specific to the tune and the
`programmer who wrote the player) to be patched to play through the SAA
`etc.
Damn, really didn`t know this, I thought that the .AY files
were just data for the soundchip, although having heard 48K beeper
and 128K AY in the format, I should have realised it included the player :(
Thanks for info Colin, I`d misunderstood both things, erm ;)
Cal...
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