These cards (same for the JMicron JMB363 based ones) do not need any programmed ROM unless you are really interested in booting from an ODD attached to that card. Nowadays, this is somewhat pointless because any more or less recent mainboard can boot from USB storage devices and installation of Windows Vista / 7 / 8 and many Linux distributions from an USB stick is pretty easy and more comfortable than installing from any ODD.
b3400.bin is the ROM binary for the non-RAID mode.
Latest official drivers, with both digitally signed .sys files and WHQL certifications. Anyway… You can get the latest official drivers (real problem here is the latest ROM, not preserved by Microsoft) from certain Microsoft’s site. They are repacked into cab files, though.
That Microsoft’s site I am speaking about, only supported by the Internet Explorer browser.
Just install the requested ActiveX control and search for the PnP ID of this card. Sort properly the search results to fit your needs and done.
Drivers posted above are the original ZIP archives posted by Silicon Image. Microsoft offers these ones, the same ones repacked into a cab archive, as stated above.