4. Platform specific header files

Programs containing Atari specific code may use the atari.h header file.

4.1 Atari specific functions

The functions and global variable listed below are special for the Atari. See the function reference for declaration and usage.

• get_ostype
• get_tv
• _dos_type
• _gtia_mkcolor
• _getcolor
• _getdefdev
• _graphics
• _rest_vecs
• _save_vecs
• _scroll
• _setcolor
• _setcolor_low

4.2 Hardware access

The following pseudo variables declared in the atari.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.

GTIA_READ and GTIA_WRITE

The GTIA_READ structure allows read access to the GTIA. The GTIA_WRITE structure allows write access to the GTIA. See the _gtia.h header file located in the include directory for the declaration of the structure.

POKEY_READ and POKEY_WRITE

The POKEY_READ structure allows read access to the POKEY. The POKEY_WRITE structure allows write access to the POKEY. See the _pokey.h header file located in the include directory for the declaration of the structure.

ANTIC

The ANTIC structure allows read access to the ANTIC. See the _antic.h header file located in the include directory for the declaration of the structure.

PIA

The PIA structure allows read access to the PIA 6520. See the _pia.h header file located in the include directory for the declaration of the structure.