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Comment by Klonoar | Hacker News Reader

This is some incredible work. There's a few ports out there I've tried, but this is by far the most performant yet. Definitely interested to see how further it's taken.

I'm also interested to see where the author learned about the inner workings of the Gameboy (i.e, if Nazar's work had any influence: http://imrannazar.com/GameBoy-Emulation-in-JavaScript:-The-C... )

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Romhacking.net is one of the best sources for console inner workings. I've been using for SNES internals and found everything from the official 65c816 manual to the SNES Developer Manual Nintendo used to send to devs, to text documents with very precise timing information for the entire console. Very VERY highly recommended.

http://www.romhacking.net/

Another great resource (although it's not as well-maintained as it was in days past) is Zophar's Domain: http://zophar.net

I originally started using it in 1996/1997 as a place to find emulators, but as I got more into low-level stuff, it became my go-to site for console information. Absolutely invaluable.

There is also GBATEK, from the no$gba emulator. It provides a full description of the memory map, interrupts, IO ports and rom layout for GB, GBA and now even the DS.

http://nocash.emubase.de/gbatek.htm

The CPU instruction sets can be obtained from the original manufacturers (ARM9/ARM7 for DS, ARM7 for GBA and Z80 for the original Gameboy - and the Color version).

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