There needs to be some clarification on PS2 BIOS versions! –
I read many saying there are 090 BIOSes, and some even say that the US V8 should have an 090 BIOS. But we are only at 050 currently, so unless there is a huge jump in BIOS versions, the next US version should be 060.
Let's set this BIOS thing straight.
On the BIOS chip, there are lines of numbers. One the later models, there are multiple lines with code numbers. But if we refer to the numbering based on the launch day models, the D line is the line that determines the BIOS:
D 110 0x0
Replace X with the BIOS version number.
V3s threw a curve ball in as the BIOS verison line started with a B, but the formatting was still like the D line from the above example.
V4 and later had both the D line and the B line.
The line that throws many off is the B line
Let's clear this up!
The Yellow PS2 auto-boots all. PS2, PS1 stealth and DVD movies.