4. Platform specific header files

Programs containing Atmos specific code may use the atmos.h header file.

4.1 Hardware access

The following pseudo variables declared in the atmos.h header file do allow access to hardware located in the address space. Some variables are structures, accessing the struct fields will access the chip registers.

VIA

Access to the VIA (versatile interface adapter) chip is available via the VIA variable. The structure behind this variable is explained in _6522.h.