I have a couple of MSI 6501 Dual AMD Athlon MP boxes here that
appear to have the same hardware on them. I loaded the latest 1.6
with today's i386mp_plus16_stable on both. Both come up fine with
the latest 1.6 SP kernel, Both cpus come up fine with the MP kernel.
However, there appears to be a problem with interrupt contention
on one of the boxes and not the other. As far as I can tell, the
bioses are set identically and are running the same kernel. Vendor
claims they are identical, bought at the same time.

Questions :

Is there a significance to 
mainbus0: Intel MP Specification (Version 1.1) (OEM00000 PROD00000000)
vs.
mainbus0: Intel MP Specification (Version 1.4) (OEM00000 PROD00000000)

Any idea why the USB and fxp0 initialization sequence is different
between the two boxes?

Thanks

----------------
NetBSD 1.6 (ENKI_MP) #0: Mon Sep  9 13:03:08 CDT 2002
    kent@enki:/opt/syssrc/sys/arch/i386/compile/ENKI_MP
total memory = 1023 MB
avail memory = 944 MB
using 6144 buffers containing 52508 KB of memory
BIOS32 rev. 0 found at 0xfb100
mainbus0 (root)
---
(problem with interrupts: )
mainbus0: Intel MP Specification (Version 1.1) (OEM00000 PROD00000000)
(vs. no problem with interrupts: )
mainbus0: Intel MP Specification (Version 1.4) (OEM00000 PROD00000000)
---
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Athlon Model 6 (Palomino) (686-class), 1533.51 MHz
cpu0: features 383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features 383fbff<PGE,MCA,CMOV,FGPAT,PSE36,MMX>
cpu0: features 383fbff<FXSR,SSE>
cpu0: I-cache 64 KB 64b/line 2-way, D-cache 64 KB 64b/line 2-way
cpu0: L2 cache 256 KB 64b/line 16-way
cpu0: ITLB 16 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: DTLB 32 4 KB entries fully associative, 8 4 MB entries 4-way
cpu0: calibrating local timer
cpu0: apic clock running at 266 MHz
cpu0: 8 page colors
cpu1 at mainbus0: apid 1 (application processor)
cpu1: starting
cpu1: AMD Athlon Model 6 (Palomino) (686-class), 1533.40 MHz
cpu1: features 383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu1: features 383fbff<PGE,MCA,CMOV,FGPAT,PSE36,MMX>
cpu1: features 383fbff<FXSR,SSE>
cpu1: I-cache 64 KB 64b/line 2-way, D-cache 64 KB 64b/line 2-way
cpu1: L2 cache 256 KB 64b/line 16-way
cpu1: ITLB 16 4 KB entries fully associative, 8 4 MB entries fully associative
cpu1: DTLB 32 4 KB entries fully associative, 8 4 MB entries 4-way
mpbios: bus 0 is type PCI    
mpbios: bus 1 is type PCI   
mpbios: bus 2 is type PCI
mpbios: bus 3 is type ISA    
ioapic0 at mainbus0 apid 2 (I/O APIC)
ioapic0: pa 0xfec00000, version 11, 24 pins
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: Advanced Micro Devices AMD762 NorthBridge (rev. 0x11)
agp0 at pchb0: aperture at 0xe8000000, size 0x8000000
ppb0 at pci0 dev 1 function 0: Advanced Micro Devices AMD762 AGP Bridge
 (rev.  0x00)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
vga1 at pci1 dev 5 function 0: ATI Technologies Rage Fury MAXX AGP 4x (TMDS)
 (rev. 0x00)
wsdisplay0 at vga1 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
pcib0 at pci0 dev 7 function 0
pcib0: Advanced Micro Devices AMD768 PCI to ISA/LPC Bridge (rev. 0x04)
pciide0 at pci0 dev 7 function 1: Advanced Micro Devices AMD768 IDE
 Controller (rev. 0x04)
pciide0: bus-master DMA support present
pciide0: primary channel configured to compatibility mode
wd0 at pciide0 channel 0 drive 0: <WDC WD200BB-32AUA1>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 19092 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 39102336 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
pciide0: primary channel interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100)
 (using DMA data
transfers)
pciide0: secondary channel configured to compatibility mode
atapibus0 at pciide0 channel 1: 2 targets
atapibus0 at pciide0 channel 1: 2 targets
cd0 at atapibus0 drive 0: <CDU5211, , YYS7> type 5 cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
pciide0: secondary channel interrupting at irq 15
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33)
 (using DMA data transfers)
Advanced Micro Devices AMD768 Power Management Controller
 (miscellaneous bridge,
 revision 0x03) at pci0 dev 7 function 3 not configured
Advanced Micro Devices AMD768 AC97 Audio
 (audio multimedia, revision 0x03) at
 pci0 dev 7 function 5 not configured
ppb1 at pci0 dev 16 function 0: Advanced Micro Devices 
 AMD768 PCI to PCI Bridge (rev. 0x04)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled
---
(problem with interrupts: )
ohci0 at pci2 dev 0 function 0: Advanced Micro Devices AMD768 USB
 Controller (rev. 0x07)
ohci0: interrupting at apic 2 int 19 (irq 11)
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Advanced Micro OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
fxp0 at pci2 dev 4 function 0: i82550 Ethernet, rev 12
fxp0: interrupting at apic 2 int 16 (irq 11) 
fxp0: Ethernet address 00:02:b3:a0:e7:3d
inphy0 at fxp0 phy 1: i82555 10/100 media interface, rev. 4
inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ohci1 at pci2 dev 6 function 0: NEC USB Host Controller (rev. 0x41)
ohci1: interrupting at apic 2 int 18 (irq 5)
ohci1: OHCI version 1.0
usb1 at ohci1: USB revision 1.0
uhub1 at usb1 
uhub1: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
ohci2 at pci2 dev 6 function 1: NEC USB Host Controller (rev. 0x41)
ohci2: interrupting at apic 2 int 19 (irq 11)
ohci2: OHCI version 1.0
usb2 at ohci2: USB revision 1.0
uhub2 at usb2
uhub2: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
NEC USB Host Controller (USB serial bus, interface 0x20, revision 0x02)
 at pci2
dev 6 function 2 not configured
---
(vs. no problem with interrupts: )
ohci0 at pci2 dev 0 function 0: Advanced Micro Devices AMD768 USB Controller
(rev. 0x07)
ohci0: interrupting at apic 2 int 19 (irq 11)
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Advanced Micro OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
fxp0 at pci2 dev 4 function 0: i82550 Ethernet, rev 12
fxp0: interrupting at apic 2 int 16 (irq 11) 
fxp0: Ethernet address 00:02:b3:a0:e7:3d
inphy0 at fxp0 phy 1: i82555 10/100 media interface, rev. 4
inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ohci1 at pci2 dev 6 function 0: NEC USB Host Controller (rev. 0x41)
ohci1: interrupting at apic 2 int 18 (irq 5)
ohci1: OHCI version 1.0
usb1 at ohci1: USB revision 1.0
uhub1 at usb1 
uhub1: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
ohci2 at pci2 dev 6 function 1: NEC USB Host Controller (rev. 0x41)
ohci2: interrupting at apic 2 int 19 (irq 11)
ohci2: OHCI version 1.0
usb2 at ohci2: USB revision 1.0
uhub2 at usb2
uhub2: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
NEC USB Host Controller (USB serial bus, interface 0x20, revision 0x02) at pci2
dev 6 function 2 not configured
---
...
(problem with interrupts: )
fxp0: device timeout
fxp0: device timeout
fxp0: device timeout
fxp0: device timeout
fxp0: device timeout

Thus the network doesn't come up on this box.