Yesterday I update OpenBSD 3.9 on my laptop to the latest snapshot. Here is diff against 3.9 and 4.0-beta `dmesg':
-OpenBSD 3.9 (GENERIC) #617: Thu Mar 2 02:26:48 MST 2006 +OpenBSD 4.0-beta (GENERIC) #1055: Thu Aug 3 11:39:24 MDT 2006 -cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CFLUSH,ACPI,MMX,FXSR,SSE,SSE2,TM,SBF -real mem = 258449408 (252392K) -avail mem = 228835328 (223472K) +cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,TM,SBF +real mem = 258437120 (252380K) +avail mem = 228171776 (222824K) -bios0 at mainbus0: AT/286+(66) BIOS, date 06/29/04, BIOS32 rev. 0 @ 0xfd540 +bios0 at mainbus0: AT/286+(66) BIOS, date 06/29/04, BIOS32 rev. 0 @ 0xfd540, SMBIOS rev. 2.31 @ 0xdf810 (27 entries) +bios0: Acer TravelMate 2300 -"unknown" at iic0 addr 0x18 not configured -auich0: measured ac97 link rate at 48001 Hz, will use 48000 Hz +auich0: measured ac97 link rate at 47998 Hz, will use 48000 Hz