Topic: Some Apple II fun
Was searching for Apple II beeper music examples, and found this one. Sounds very fun!
- utz
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Re: Some Apple II fun
Interesting, sounds like the engine uses a combination of PCM samples and synth.
That reminds me, I actually have a couple of unreleased Apple II engines laying around! Never released them because I could never work out a way of building disk images that don't involve adding some proprietary blobs, but I think things have been moving in that domain in recent years. So I should get those out some day... Nothing fancy, just boring standard stuff, though.
Re: Some Apple II fun
I'm building Apple 2 disk images for my CP/M-65 project. The crucial bit is shuffling the image into the right sector order because the bootloader uses this wretched soft sector remapping. I've got a tool here: https://github.com/davidgiven/cpm65/blo … shuffle.cc The right order is 02468ace13579bdf...
I wasn't aware that anyone had done softsynths for the Apple. I thought I was the first to do it on a 1MHz 6502 on the PET! I'd be interested to see how they work; I had a great deal of difficulty fitting 3.5 channels into the available CPU time, and that was with using a 6522's shift register to do much of the heavy lifting.
- utz
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Re: Some Apple II fun
Thanks for sharing that tool!
Softsynths on the Apple 2 actually predate softsynths on both Spectrum and IBM PC! Lo and behold, the mighty Electric Duet:
https://arachnoid.com/electric_duet/
david.given wrote:
I thought I was the first to do it on a 1MHz 6502 on the PET!
Unfortunately not: https://www.pouet.net/prod.php?which=87465 https://github.com/AYCEdemo/pettan
You're definitely the first to make a proper native tracker for the thing though!
For curiosity, I've dumped my old engines here: http://irrlichtproject.de/downloads/a2snd.zip No guarantees whatsoever, I haven't looked at this code for years and I have no memories of how functional/complete it actually is.