English Amiga Board - View Single Post - WHDLoad patch for music/sfx .. is this even possible?

jotd · 08 March 2021, 20:52

some mod replayers are lazy and waste cycles when writing to dma before issuing more sound commands (else the sound is choppy or corrupt). A lot of soundtracker routines to that infamous active cpu loop, which wastes power (not a problem in menus or loading screens, but can be an issue during the game, including sprite glitches or refresh issues)

Clever replayers like phx ptreplay use cia timer interrupt 6 to know when to apply the new sound command, and in the meantime, the game logic/graphics/whatever can run.

if the games uses standard modules, maybe it's possible to replace mod replayer by phx mod replay and plug the sfx on it... and get faster games

That would be a nice whdload project (also not trivial)

that or CD32load CD slaves for CD music + sfx ... only on the best amiga console

08 March 2021, 20:52	#26
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,200	some mod replayers are lazy and waste cycles when writing to dma before issuing more sound commands (else the sound is choppy or corrupt). A lot of soundtracker routines to that infamous active cpu loop, which wastes power (not a problem in menus or loading screens, but can be an issue during the game, including sprite glitches or refresh issues) Clever replayers like phx ptreplay use cia timer interrupt 6 to know when to apply the new sound command, and in the meantime, the game logic/graphics/whatever can run. if the games uses standard modules, maybe it's possible to replace mod replayer by phx mod replay and plug the sfx on it... and get faster games That would be a nice whdload project (also not trivial) that or CD32load CD slaves for CD music + sfx ... only on the best amiga console