The P1394a is a serial bus that provides the same service as modern IEEE-standard parallel busses, at a much lower cost. The P1394a has multiple layers namely, physical layer, link layer, transaction layer and bus management layer. The 1394 Open Host Controller Interface (Open HCI) is an implementation of the link layer protocol of the 1394 serial bus, with additional features to support the transaction and bus management layers. In this paper, we present the Validation Environment for validation of a P1394a OHCI-Link Synthesizable Core with a 32-bit PCI Bus Interface. The results show that by having a system level validation environment, effective validation can be achieved at the register transfer level.