HP Netserver Service Handbook, Volume 1 - Low End

55
System Board
Slot 1 (occupied) 16-bit ISA (half-length)
or 32-bit PCI
Slot 2 (available) 32-bit PCI
Slot 3 (occupied) 32-bit PCI
Slot 4 (available) 16-bit ISA
or 32-bit PCI
Slot 5 (available) 16-bit ISA
Slot 6 (available) 16-bit ISA