acpi panic

[j w]

Hello
I'm installing FreeBSD 6.2 (first time experience) on an oldish
computer and got this ACPI panic when booting the install CD:

ACPI APIC Table:  <ASUS P2B-D>
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU Pentium III/Pentium III Xeon/Celeron (551.25-MHz 686-class CPU)
  Origin = "GenuineIntel" Id = 0x673 Stepping = 3
  Features = 0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory = 536858624 (511 MB)
avail memory = 511750144 (488 MB)
ACPI disabled by blacklist. Contact your BIOS vendor.
MADT: ACPI Startup failed with AE_ERROR
Try disabling either ACPI or apic support.
panic: using MADT but ACPI doesn't work
Uptime: 1s
Automatic reboot in 15 seconds - press a key on the console to abort

Booting with ACPI disabled works ok, so no big deal

I take it the "blacklist" warning means that this hardware's ACPI just
isn't supported currently?

And what does the "contact your BIOS vendor" message mean? Is this
something that can be fixed by upgrading firmware/BIOS?

Thanks
-John