Mayukh's OpenBSD page

Successfully installed OpenBSD 4.0 on Sony PCG-505TR laptop.
dmesg file
xorg.conf

Items required

OpenBSD 4.0 CD
CD-ROM drive (mine is a detachable Sony PCGA-CD51 drive)
Network card (I have a Netgear FA-411)

The procedure starts by using the OpenBSD CD, but completes the install via FTP. This is because I couldn't get my system to recognize the CD as an installation source, although it booted from the CD just fine.

Procedure

Use boot CD
At the boot> prompt, enter boot -c and hit enter
As the system boots, it gives you a UKC> prompt. Enter disable pcibios followed by disable pciide here
Type exit to continue booting. It should ask you to Install, Upgrade or Shell as normal.
When asked to configure network, eject the CD attachment from the PCMCIA slot and put in the network card. This is because the system does NOT offer the CD as an installation source later on for some reason. Perhaps not disabling pciide above may make it show up as an installation source. In any case, I ejected the CD attachment, stuck in the network card and configured it. Then, I selected installation via FTP and installed from my nearest FTP site.
Installation completed normally

After installation, I had to boot with pcibios disabled, as explained above. I didn't disable pciide this time though. I configured X with Xorg -configure and moved the resultant generated file to /etc/X11/xorg.conf. The following work just fine (will add more later):

apm

audio

Port Extender