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I wonder if the original system was written in ASM or a higher-level language (a variant of C, maybe?). Anyone do any GBC development care to comment?

Definitely ASM for GB/GBC. Not much C until GBA.


Z80 ASM is both quite limited (no multiply or division) and very straightforward. That's how I remember it, at least :) For fond memories, dig a copy of Rodney Zak's "Programming the Z80".


> Rodney Zak's "Programming the Z80"

The first and still the best programming book I ever read. It taught me architecture, instruction fetching and decoding, how the clock comes into it, as well as the usual assembly programming. I loved that book. I still regret throwing it out, 20 years later.

Good news: you can download a PDF. http://www.freetechbooks.com/programming-the-z80-t784.html


I don't know if it's because I'm a stupid old fart, but it seems to me that the explanation this book gives of microprocessor architecture, busses, etc are still unbeatable because Z80 is so simple. It's probably still a valuable introduction to computing, if only for the first few chapters on binary, computation, etc.


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