223cc6685e
git-svn-id: svn://svn.compuextreme.de/Viitor/V963/Viitor_cc65@5933 504e572c-2e33-0410-9681-be2bf7408885
117 lines
3.1 KiB
HTML
117 lines
3.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.20">
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<TITLE>Apple ][ specific information for cc65: Loadable drivers</TITLE>
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<LINK HREF="apple2-6.html" REL=next>
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<LINK HREF="apple2-4.html" REL=previous>
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<LINK HREF="apple2.html#toc5" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="apple2-6.html">Next</A>
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<A HREF="apple2-4.html">Previous</A>
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<A HREF="apple2.html#toc5">Contents</A>
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<HR>
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<H2><A NAME="s5">5.</A> <A HREF="apple2.html#toc5">Loadable drivers</A></H2>
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<P><EM>Note:</EM> Since the Apple ][ doesn't have working disk I/O
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(see
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<A HREF="apple2-6.html#limitations">section "Limitations"</A>), the
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available drivers cannot be loaded at runtime (so the term "loadable drivers"
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is somewhat misleading). Instead, the drivers have to be converted using the
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<A HREF="co65.html">co65 utility</A> and statically linked. While
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this may seem overhead, it has two advantages:</P>
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<P>
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<OL>
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<LI>The interface is identical to the one used for other platforms
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and to the one for the Apple ][ once it has disk I/O.</LI>
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<LI>Once disk I/O is available, existing code can be changed to load drivers
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at runtime with almost no effort.</LI>
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</OL>
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</P>
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<H2><A NAME="ss5.1">5.1</A> <A HREF="apple2.html#toc5.1">Graphics drivers</A>
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</H2>
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<P><EM>Note:</EM> Since memory for the high resolution graphics has to be allocated,
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programs using graphics drivers will have to be linked using a special linker
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configuration. See the <CODE>apple2-tgi.cfg</CODE> file in the documentation
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directory, and the
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<A HREF="ld65.html">linker documentation</A> on
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how to use it.</P>
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<P>
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<DL>
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<DT><B><CODE>a2.lo.tgi</CODE></B><DD><P>This driver was written by Stefan Haubenthal. It features a resolution of
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40×40 with 16 colors. At the bottom of the screen, 4 additional text lines
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are available.</P>
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<DT><B><CODE>a2.hi.tgi</CODE></B><DD><P>This driver was written by Stefan Haubenthal. It features a resolution of
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280×192 with 6 colors.</P>
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</DL>
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</P>
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<H2><A NAME="ss5.2">5.2</A> <A HREF="apple2.html#toc5.2">Extended memory drivers</A>
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</H2>
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<P>
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<DL>
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<DT><B><CODE>a2.lc.emd</CODE></B><DD><P>Gives access to 12KB RAM (48 pages of 256 bytes each) on the
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Apple ][ language card. The driver was contributed by
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Stefan Haubenthal. Note: This driver is incompatible with any DOS using
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the language card memory!</P>
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</DL>
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</P>
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<H2><A NAME="ss5.3">5.3</A> <A HREF="apple2.html#toc5.3">Joystick drivers</A>
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</H2>
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<P>
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<DL>
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<DT><B><CODE>a2.stdjoy.joy</CODE></B><DD><P>Supports up to two standard analog joysticks connected to the game port of
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the Apple ][.</P>
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</DL>
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</P>
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<H2><A NAME="ss5.4">5.4</A> <A HREF="apple2.html#toc5.4">Mouse drivers</A>
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</H2>
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<P>Currently no drivers available (in fact, the API for loadable mouse drivers
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does not exist).</P>
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<H2><A NAME="ss5.5">5.5</A> <A HREF="apple2.html#toc5.5">RS232 device drivers</A>
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</H2>
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<P>No serial drivers are currently available for the Apple ][.</P>
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<HR>
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<A HREF="apple2-6.html">Next</A>
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<A HREF="apple2-4.html">Previous</A>
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<A HREF="apple2.html#toc5">Contents</A>
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</BODY>
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</HTML>
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