I have a P4DP6-Q (BIOS 1.3c) and an Intel RAID SRCMR. With this ZeroChannel controller installed, I cannot boot the machine if there is a PS/2 mouse installed. The BIOS of the intel SRCMRU is version 7.03c, firmware 2.34.00-R030. If there is no mouse attached, the interrupt of the controller goes on 12, with a mouse, the interrupt is 11.
The boot up problem exists only after you flash the ZCR firmware and restart. Powering off the whole system and powering on again will fix the problem.