No. ISApnp is an extremely neat hack. It is not a PnP manager, its not capable
of relocating devices to avoid clashes for example. The PnP kernel code uses
user space for almost everything it can but is capable of conflict resolution
(eg your PnP modem appears on 0x3f8, irq 4, you open com3 using irq 4 and
it can move the modem for you)