I forgot to mention, this is on a dual Athlon MP 1900+. Here's the appropriate part of the dmesg:
CPU: AMD Athlon(TM) MP 1900+ (1600.07-MHz 686-class CPU) Origin = "AuthenticAMD" Id = 0x662 Stepping = 2 Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE> AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!> real memory = 1073659904 (1023 MB) avail memory = 1035481088 (987 MB) Programming 24 pins in IOAPIC #0 IOAPIC #0 intpin 2 -> irq 0 FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs cpu0 (BSP): apic id: 0, version: 0x00040010, at 0xfee00000 cpu1 (AP): apic id: 1, version: 0x00040010, at 0xfee00000 io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000 -gordon
pgp00000.pgp
Description: PGP signature
