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<h1>18 Low-level DOS/BIOS and Hardware-oriented Programming</h1>

<p>This chapter sheds some light on a few aspects of writing DJGPP programs
which interact with hardware or use interrupts.

<ul>
<li><a href="faq18_1.html">int86</a>:                  int86 doesn't always work. 
<li><a href="faq18_2.html">Pointer segment</a>:        How to specify pointers when you call an interrupt. 
<li><a href="faq18_3.html">Zero SP</a>:                How to call real-mode procedures. 
<li><a href="faq18_4.html">Xfer</a>:                   Moving data to and from conventional memory. 
<li><a href="faq18_5.html">Move structs</a>:           How to move structs from conventional memory. 
<li><a href="faq18_6.html">Fat DS</a>:                 Fast direct access to memory-mapped devices. 
<li><a href="faq18_7.html">Above 1MB</a>:              Interact with memory-mapped devices above 1MB. 
<li><a href="faq18_8.html">RMCB</a>:                   How to let DOS/BIOS call your code. 
<li><a href="faq18_9.html">Hardware interrupts</a>:    How to hook HW interrupts from DJGPP. 
<li><a href="faq18_10.html">_go32 vs __dpmi</a>:        Which functions should you use? 
<li><a href="faq18_11.html">HW Int pitfalls</a>:        Does your machine wedge?  Here are some reasons. 
<li><a href="faq18_12.html">Inline Asm</a>:             How to write inline assembly with GCC. 
<li><a href="faq18_13.html">DMA</a>:                    How to use DMA from DJGPP programs. 
</ul>

<p><hr>
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