The OS used in my disasembly is: version 2.05. The LED is controlled by what is called the "C-specification module" or "CMOD" in Casio's emulator files. See Yatis' documentation for more information.

Casio Computer Co., Ltd. announced the release of new additions to the G-SHOCK line of shock-resistant watches. Three new GM-6900 models features metal bezels. The 6900 series, which has been ...