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