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#opl2

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The OPL Archive - Release 10 is live!
This nice little update adds 69 songs, including the EMS Music System, covers by unknown authors of the Korean AdLib scene, and the oldest OPL2 songs yet - the demos from the Yamaha PSR-11 keyboard (1986).

Check it out!
opl.wafflenet.com/
#chiptune #opl2 #opl3

opl.wafflenet.comThe OPL ArchiveThe OPL Archive is a tribute to music written for the classic Yamaha OPL series sound chips. This project intends to bring as much of that music together in one place as possible.

I've published official webpage containing info related to NokturnFM2 / 3 cartridges, which allow use of Yamaha OPL2 / 3 soundchips with Atari ST and up. Right now is rather short project description, some programming info and NokturnFM.play, which allows music replay with various devices. Not everything is there yet, lot's of work, not much time, so stay tuned. nokturnal.pl/home/atari/noktur

nokturnal.pl[nokturnal] » Official NokturnFM Atari ST OPL2/3 cartridges page

I've improved NokturnFM2/3 carts a little, I've added plastic spacers, so they will not hang on rom port (got to drill bigger holes in pcb, due M2,5 spacers) and I've changed old linear potentiometer to logarythmic in NokturnFM2, which was good choice, because on old one in the middle of the range i've got audio distortions (no surprise). I also experiment with alternative opamps on both cart types.

I've just ordered parts for small batch of NokturnFM2, NokturnFM3 carts (10pcs each). Ordering parts is exhausting.. Took me like 5h today. Hopefully I had BOM list with links to parts, which halved the amount of work needed to assembly everything. Worst thing is syncing order with existing electronic parts inventory (to not end up with alot of unused parts). I've also decided to give up cartridge case for now.

just received new pcb's with fixed 'reverted' data bus.I've submitted also final version of pcbs to production.Probably i will test them next week. If they will be ok, then i guess it will be end of this journey. The only thing will be improving software. I've also got name for both cartridges: NokturnFM3 and NokturnFM2.FM for frequency modulation synthesis,2 or 3 stands for OPL type, nokturn - has musical meaning, development was during late nights and my site is nokturnal.

so my secret opl2 cartridge works. Turns out if you connect address lines not in reverse order things start to work 🤣. I've made similar mistake in opl3 version. Stared on this error for months on schematics without noticing.. What a relief. Fortunately i could patch it on driver level, but still pcb needs to be fixed. Funny thing is that i've looked at schematics by accident briefly today and i thought after looking at cart interface wtf i was thinking then...

The OPL Archive - Release 8 is now available!
209 new songs, including the original AdLib song disks! 354 updated files fixing lots of issues!
Get it while it's hot at opl.wafflenet.com! But then again, the OPL series sound chips are ALWAYS hot!

opl.wafflenet.comThe OPL ArchiveThe OPL Archive is a tribute to music written for the classic Yamaha OPL series sound chips. This project intends to bring as much of that music together in one place as possible.