281 lines
6.6 KiB
Perl
281 lines
6.6 KiB
Perl
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#define _PAGE_ Setting up an SH-1 compiler for Windows
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#include "head.t"
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<P>
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by <A href="mailto:edx@codeforce.d2g.com">Felix Arends</A>, 1/8/2002
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<BR>
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<P>
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NOTE: THIS COMPILER DOES NOT YET WORK WITH WINDOWS XP!!!
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<P>
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I have spent a long time figuring out how to compile SH1 code in windows (using
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the sh-elf-gcc compiler) and when I finally compiled the first OS for my
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Jukebox I decided to write a little tutorial explaining the setup process.
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<H2>
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The GNU-SH Tool Chain for Windows
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</H2>
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<P>
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This is actually all you need to download. It includes the binutils, gcc and
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newlib. The complete GNUSH Tool Chain (currently v0101) is 117MB but for you it
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is enough to download the GNUSH Tool Chain for ELF format (45 MB).
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<P>
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The GNUSH website can be found at <a href="http://www.kpit.com/download/downloadgnu.htm">
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http://www.kpit.com/download/downloadgnu.htm</a> (source code is also
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available there) and the direct link to the file you need is <a href="http://www.kpit.com/download/elf.zip">
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http://www.kpit.com/download/elf.zip</a>. It uses the cygwin dll to emulate
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a linux layer but you do not have to care about that.
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<H2>
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Setting up the Compiler
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</H2>
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<P>
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Install the GNUSH Tool Chain (nothing you really have to care about during the
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installation process). After that you should add some paths to your PATH system
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environment variable. If you have Windows 95/98/Me you can do that by modifying
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your autoexec.bat:
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<P>
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Add the following line to your autoexec.bat:
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<P>
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<TABLE cellSpacing="1" cellPadding="1" width="100%" border="1">
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<TBODY>
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<TR>
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<TD bgcolor="#a0d6e8">
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<code>SET PATH=%PATH%;C:\Programs\kpit\GNU-SH v0101
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[ELF]\Sh-elf\bin\;C:\Programs\kpit\GNU-SH v0101
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[ELF]\Sh-elf\lib\gcc-lib\sh-elf\2.9-GNU-SH-v0101\;C:\Programs\kpit\GNU-SH v0101
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[ELF]\Other Utilities</code>
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</TD>
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</TR>
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</TBODY>
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</TABLE>
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<P>
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</CODE>(Note: This is just one single line)
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<P>
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Replace the beginning of the paths with the path-name you chose to installt the
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tools in. Reboot.
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<P>
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In Windows 2000 it is a bit different. You can find the PATH-environment
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variable if you right-click the "My Computer" icon on your desktop and choose
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"Properties" in the popup-menu. Go to the "Advanced" tab and click
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"Environment-Variables":
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<P align="center">
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<IMG src="enviro.jpg"> <IMG src="enviro2.jpg"> <IMG src="enviro3.jpg">
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<P>
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(Note: There is also a PATH-variable in the "System variables" list, it does
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not matter which one you edit)
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<P>
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To the value the PATH-variable already has, add:
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<P>
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<TABLE cellSpacing="1" cellPadding="1" width="100%" border="1">
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<TR>
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<TD bgcolor="#a0d6e8">
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<code>;C:\Programs\kpit\GNU-SH v0101 [ELF]\Sh-elf\bin\;C:\Programs\kpit\GNU-SH
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v0101 [ELF]\Sh-elf\lib\gcc-lib\sh-elf\2.9-GNU-SH-v0101\;C:\Programs\kpit\GNU-SH
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v0101 [ELF]\Other Utilities</code>
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</TD>
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</TR>
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</TABLE>
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<P>
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Replace the program path with the path you chose for the program. You do not
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have to reboot.
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<H2>
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An "empty" System
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</H2>
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<P>
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First of all, I'll explain what to do to compile an "empty" system. It just
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initializes and calls the <EM>main</EM> function, but does not do anything
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else. You can add some code to the <EM>main</EM> function and simply recompile.
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It is actually like this: You don't have to care about any of those files,
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because you won't have to change much of them (except the main.cpp of
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course!!).
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<P>
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<STRONG>main.cpp:
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<BR>
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</STRONG>
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<TABLE cellSpacing="1" cellPadding="1" width="550" border="1">
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<TR>
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<TD bgcolor="#a0d6e8">
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<P>
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<code><font color="#0000ff">int</font> __main(<font color="#0000ff">void</font>){}
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<BR>
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<BR>
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<font color="#0000ff">int</font> main(<font color="#0000ff">void</font>)
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<BR>
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{
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<BR>
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<font color="#009000"> // add code here</font>
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<BR>
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}
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<BR>
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<BR>
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<FONT color="#0000ff">extern</FONT> <FONT color="#0000ff">const</FONT> <FONT color="#0000ff">
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void</FONT> stack(<FONT color="#0000ff">void</FONT>);
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<br>
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<br>
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<FONT color="#0000ff">const</FONT> <FONT color="#0000ff">void</FONT>* vectors[]
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__attribute__ ((section (".vectors"))) =
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<br>
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{
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<br>
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main, <FONT color="#009000">/* Power-on reset */</FONT>
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<br>
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stack, <FONT color="#009000">/* Power-on reset (stack pointer)
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*/</FONT>
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<br>
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main, <FONT color="#009000">/* Manual reset */</FONT>
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<br>
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stack <FONT color="#009000">/* Manual reset (stack pointer) */</FONT>
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<br>
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};
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<br>
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</code>
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</TD>
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</TR>
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</TABLE>
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<P>
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We need a start-up assembler code:
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<P>
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<STRONG>start.asm
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<br>
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</STRONG>
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<TABLE cellSpacing="1" cellPadding="1" width="550" border="1">
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<TR>
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<TD bgcolor="#a0d6e8">
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<code>
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<pre>! note: sh-1 has a "delay cycle" after every branch where you can
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! execute another instruction "for free".
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.file"start.asm"
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.section.text.start
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.extern_main
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.extern _vectors
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.extern _stack
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.global _start
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.align 2
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_start:
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mov.l1f, r1
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mov.l3f, r3
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mov.l2f, r15
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jmp@r3
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ldcr1, vbr
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nop
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1:.long_vectors
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2:.long_stack
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3:.long_main
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.type_start,@function</pre>
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</code>
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</TD>
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</TR>
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</TABLE>
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<P>
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(I took this code from Bj<EFBFBD>rn's LCDv2 source)
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<P>
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Then we need a linker configuration file:
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<P>
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<STRONG>linker.cfg</STRONG>
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<BR>
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<TABLE cellSpacing="1" cellPadding="1" width="550" border="1">
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<TR>
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<TD bgcolor="#a0d6e8">
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<P>
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<code>
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<pre>ENTRY(_start)
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OUTPUT_FORMAT(elf32-sh)
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SECTIONS
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{
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.vectors 0x09000000 :
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{
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*(.vectors);
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. = ALIGN(0x200);
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*(.text.start)
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*(.text)
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*(.rodata)
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}
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.bss :
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{
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_stack = . + 0x1000;
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}
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.pad 0x0900C800 :
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{
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LONG(0);
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}
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}</pre>
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</code>
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</TD>
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</TR>
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</TABLE>
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<P>
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(This code comes from B<EFBFBD>rn's LCDv2 as well)
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<P>
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Last but not least, we need a batch file to link all this and output a usable
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.mod file (you don't really need a batch file if you want to enter all the
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commands over and over angain :])
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<P>
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<STRONG>make.bat</STRONG>
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<BR>
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<TABLE cellSpacing="1" cellPadding="1" width="550" border="1">
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<TR>
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<TD bgcolor="#a0d6e8">
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<P>
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<code>
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<pre>SET INCLUDES=
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SET SOURCEFILES=main.c
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SET OBJECTS=main.o start.o
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sh-elf-as start.asm -o start.o -L -a
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sh-elf-gcc -O2 -m1 -o main.o -c -nostdlib %INCLUDES% %SOURCEFILES%
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sh-elf-ld -o main.out %OBJECTS% -Tlinker.cfg
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padit main.out
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scramble main.out archos.mod
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PAUSE</pre>
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</code>
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</TD>
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</TR>
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</TABLE>
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<P>
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And that's it! I have prepared all those files in a .zip archive for you so you
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don't have to copy'n'paste that much :). I have also prepared a package with
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the LCDv2 code Bj<EFBFBD>rn wrote (ready to compile with Windows).
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<P>
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<a href="LCDv2Win.zip">empty.zip</a>
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<BR>
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<a href="LCDv2Win.zip">LCDv2Win.zip</a>
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<P>
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I hope this tutorial helped you to compile an Archos firmware with windows. If
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you have any questions, comments or corrections, please mail to <A href="mailto:edx@codeforce.d2g.com">
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edx@codeforce.d2g.com</A>
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#include "foot.t"
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