mirror of
https://github.com/cc65/cc65.git
synced 2024-11-06 15:06:07 +00:00
167 lines
4.1 KiB
Plaintext
167 lines
4.1 KiB
Plaintext
<!doctype linuxdoc system>
|
|
|
|
<article>
|
|
|
|
<title>Gamate System specific information for cc65
|
|
<author>
|
|
<url url="mailto:groepaz@gmx.net" name="Groepaz/Hitmen">
|
|
<date>2015-11-29
|
|
|
|
<abstract>
|
|
An overview over the Gamate runtime system as it is implemented for the
|
|
cc65 C compiler.
|
|
</abstract>
|
|
|
|
<!-- Table of contents -->
|
|
<toc>
|
|
|
|
<!-- Begin the document -->
|
|
|
|
<sect>Overview<p>
|
|
|
|
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 <url url="funcref.html" name="function
|
|
reference">. Even functions marked as "platform dependent" may be available on
|
|
more than one platform. Please see the function reference for more
|
|
information.
|
|
|
|
|
|
<sect>Binary format<p>
|
|
|
|
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
|
|
|
|
<sect>Platform specific header files<p>
|
|
|
|
Programs containing Gamate specific code may use the <tt/gamate.h/ header file.
|
|
|
|
|
|
<sect1>Gamate specific functions<p>
|
|
|
|
<itemize>
|
|
<item>waitvsync</item>
|
|
</itemize>
|
|
|
|
|
|
<sect1>Hardware access<p>
|
|
|
|
The following pseudo variables declared in the <tt/gamate.inc/ include file do
|
|
allow access to hardware located in the address space.
|
|
|
|
<descrip>
|
|
|
|
</descrip><p>
|
|
|
|
|
|
|
|
<sect>Loadable drivers<p>
|
|
|
|
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.
|
|
|
|
|
|
<sect1>Graphics drivers<p>
|
|
|
|
No TGI graphics drivers are currently available for the Gamate.
|
|
|
|
|
|
<sect1>Extended memory drivers<p>
|
|
|
|
No extended memory drivers are currently available for the Gamate.
|
|
|
|
|
|
<sect1>Joystick drivers<p>
|
|
|
|
<descrip>
|
|
|
|
<tag><tt/gamate-stdjoy.joy (gamate_stdjoy)/</tag>
|
|
A joystick driver for the standard two buttons joypad is available.
|
|
|
|
</descrip><p>
|
|
|
|
|
|
<sect1>Mouse drivers<p>
|
|
|
|
No mouse drivers are currently available for the Gamate.
|
|
|
|
|
|
<sect1>RS232 device drivers<p>
|
|
|
|
No serial drivers are currently available for the Gamate.
|
|
|
|
|
|
|
|
<sect>Limitations<p>
|
|
|
|
<itemize>
|
|
<item>When using the C-compiler, keep in mind that only 0x200 bytes RAM in total
|
|
can be used for variables and the runtime stack.
|
|
</itemize>
|
|
|
|
<sect1>Disk I/O<p>
|
|
|
|
The existing library for the Gamate doesn't implement C file
|
|
I/O. There are no hacks for the <tt/read()/ and <tt/write()/ routines.
|
|
|
|
To be more concrete, this limitation means that you cannot use any of the
|
|
following functions (and a few others):
|
|
|
|
<itemize>
|
|
<item>printf
|
|
<item>fclose
|
|
<item>fopen
|
|
<item>fread
|
|
<item>fprintf
|
|
<item>fputc
|
|
<item>fscanf
|
|
<item>fwrite
|
|
<item>...
|
|
</itemize>
|
|
|
|
<sect>Other hints<p>
|
|
|
|
<itemize>
|
|
<item>The Gamate is emulated by MESS (<url url="http://www.mess.org/">),
|
|
run like this: <tt>mess gamate -debug -window -skip_gameinfo -cart test.bin</tt>
|
|
</itemize>
|
|
|
|
some resources on the Gamate:
|
|
|
|
<itemize>
|
|
<item><url url="http://en.wikipedia.org/wiki/Gamate">
|
|
</itemize>
|
|
|
|
<sect>License<p>
|
|
|
|
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:
|
|
|
|
<enum>
|
|
<item> 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.
|
|
<item> Altered source versions must be plainly marked as such, and must not
|
|
be misrepresented as being the original software.
|
|
<item> This notice may not be removed or altered from any source
|
|
distribution.
|
|
</enum>
|
|
|
|
</article>
|
|
|
|
|
|
|