This blog post assumes a base level of knowledge - comfort in the C programming language and bitwise math is recommended.

intro D is an excellent language and we wanted it ported to GBA. why port D? initially, when we began developing for the GBA, we used devkitarm as a build toolchain, and the makefiles I created for dusk, which in turn were based on tonc makefiles.

intro there’s not much documentation online about how the GBA RTC works, so this blog post will attempt to demystify that.