csid
SID_schematics
| csid | SID_schematics | |
|---|---|---|
| 1 | 2 | |
| 8 | 15 | |
| - | - | |
| 10.0 | 10.0 | |
| about 5 years ago | over 1 year ago | |
| C | ||
| GNU General Public License v3.0 or later | - |
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csid
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Chiptune.app
I have a physical SID chip and I was looking at implementations of players and ... was shocked at how complicated they are. I guess it makes sense though: SID files are tiny because they are in effect full C64 native programs that generate music. It would be hard to do otherwise on that platform.
I wrote a simple program that transformed basic (60hz, no PCM-style hacks) SID programs to like sequence of byte instructions for the SID chip so that I could replay without emulating and the file sizes are massive compared to the original!
Here is an awesome single file SID player written in C,
https://github.com/mlund/csid/blob/master/csid.c
SID_schematics
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Chiptune.app
instruction :) I went the extra mile and made it cycle-accurate though.
libsidplayfp is probably the best emulator out there advanced and it actually emulates voltage levels at one stage. The wiki has a bunch of info on SID reverse engineered from die shots https://github.com/libsidplayfp/SID_schematics/wiki
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C64 User's Guide question: Ch 7 creating sound...
This is a bit over my head, but you can find reverse-engineered bits of the circuitry in the libsidplayfp project's wiki: https://github.com/libsidplayfp/SID_schematics/wiki/Oscillator
What are some alternatives?
munt - A multi-platform software synthesiser emulating pre-GM MIDI devices such as the Roland MT-32, CM-32L, CM-64 and LAPC-I. In no way endorsed by or affiliated with Roland Corp.