All this used to be available from <a href=http://web.archive.org/web/20030117183100/www.sco.com/developers/devspecs/>http://www.sco.com/developers/devspecs/</a><p>
<a href=abi386-4.pdf>abi386-4.pdf</a><br>
<a href=ELF64.ps>ELF64.ps</a><br>
<a href=gabi40.pdf>gabi40.pdf</a><br>
<a href=gabi41.pdf>gabi41.pdf</a><br>
<a href=index.html>index.html</a><br>
<a href=interface.ps>interface.ps</a><br>
<a href=mipsabi.pdf>mipsabi.pdf</a><br>
<a href=MIPS-N32-ABI-Handbook.pdf>MIPS-N32-ABI-Handbook.pdf</a><br>
<a href=psABI_mips3.0.pdf>psABI_mips3.0.pdf</a><br>
<a href=vol1a.pdf>vol1a.pdf</a><br>
<a href=vol1b.pdf>vol1b.pdf</a><br>
<a href=vol2.pdf>vol2.pdf</a><br>
<a href=vol3_ps.ps>vol3_ps.ps</a><br>