xxx...three random numbers yyy where yyy=xxx+ a small random number where the result is still 3 numbers aaaa where aaaa=1+three random numbers 1 added to make it look like something special happened. bbbb where bbbb=2+three random numbers ....
I think the change from, say, three numbers xxx to 1xxx is for a new generation of CPU support for example...some hefty change for the BIOS support. The other numbers no idea...I guess various are floating around getting tested and then higher numbers are later versions...if there is any deeper code to it I have no idea.
If it were up to me, and I know it isn't, I would make it very simple. First 2 digits would be the year, and the remaining two digits would be the sequential production number. For example: new board this year, first BIOS is 1801. Any more released up to and including December 31 would be 1802, 1803, etc. First one next year is 1901, then 1902, etc...
Who knows where they dream up this stuff. Same with X99 to x299, what happened to 199? Or maybe just X100? *Now X299 is intel and X399 is AMD but who knows what the next generation will bring.*
“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein