I want to bring attention to #Calypsi which is a C and assembly compiler toolchain that supports #6502 #65816 and #68000 processors. https://www.calypsi.cc/

It runs on Mac/Win/Linux and has direct support for building programs for #C64 and #c256foenix machines with serial port debugging (maybe not working on C64, yet). It comes with excellent user manuals for each architecture, this is the 6502 manual: https://tinyurl.com/mw8rfzb5

#retrocomputing #assembly #compiler #c #c99