# Gamate System specific information for cc65

## Groepaz/Hitmen

An overview over the Gamate runtime system as it is implemented for the cc65 C compiler.

## 1. Overview

## 2. Binary format

## 3. Platform specific header files

- 3.1 Gamate specific functions

## 4. Loadable drivers

- 4.1 Graphics drivers
- 4.2 Extended memory drivers
- 4.3 Joystick drivers
- 4.4 Mouse drivers
- 4.5 RS232 device drivers

## 5. Limitations

- 5.1 Disk I/O

## 6. Other hints

## 7. License

## 1. Overview

This file contains an overview of the Gamate runtime system as it comes with the cc65 C compiler. It describes the memory layout, Gamate specific header files, available drivers, and any pitfalls specific to that platform.

Please note that Gamate specific functions are just mentioned here, they are described in detail in the separate function reference. Even functions marked as "platform dependent" may be available on more than one platform. Please see the function reference for more information.

## 2. Binary format

The standard binary output format generated by the linker for the Gamate target is a cartridge image with header. It is of course possible to change this behaviour by using a modified startup file and linker config.

Note: the first two bytes of the header contain a checksum that must be inserted by an external program. Such an utility is provided in util/gamate/gamate-fixcart.c

## 3. Platform specific header files

Programs containing Gamate specific code may use the `gamate.h` header file.

## 3.1 Gamate specific functions

- waitvsync

## 4. Loadable drivers

All drivers must be statically linked because no file I/O is available. The names in the parentheses denote the symbols to be used for static linking of the drivers.

## 4.1 Graphics drivers

No TGI graphics drivers are currently available for the Gamate.

## 4.2 Extended memory drivers

No extended memory drivers are currently available for the Gamate.

## 4.3 Joystick drivers

`gamate-stdjoy.joy (gamate_stdjoy)`

  A joystick driver for the standard two buttons joypad is available.

## 4.4 Mouse drivers

No mouse drivers are currently available for the Gamate.

## 4.5 RS232 device drivers

No serial drivers are currently available for the Gamate.

## 5. Limitations

- When using the C-compiler, keep in mind that only 0x200 bytes RAM in total can be used for variables and the runtime stack.

## 5.1 Disk I/O

The existing library for the Gamate doesn't implement C file I/O. There are no hacks for the `read()` and `write()` routines.

To be more concrete, this limitation means that you cannot use any of the following functions (and a few others):

- printf
- fclose
- fopen
- fread
- fprintf
- fputc
- fscanf
- fwrite
- ...

## 6. Other hints

- The Gamate is emulated by MESS ( http://www.mess.org/), run like this: `mess gamate -debug -window -skip_gameinfo -cart test.bin`

some resources on the Gamate:

- http://en.wikipedia.org/wiki/Gamate

## 7. License

This software is provided 'as-is', without any expressed or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.