Simultaneously supports up to four posted write transactions, four nonposted transactions, and four completion transactions pending in each direction at any time. Each posted write data queue and completion data queue can store up to 8K bytes of data. The nonposted data queues can store up to 128 bytes of data. The PCI Express interface supports a x1 link operating at full 250 Mbit/s packet throughput in each direction simultaneously. Also, the bridge supports the advanced error reporting capability including ECRC as defined in the PCI Express Base Specification, Revision 1.1. Supplemental firmware or software is required to fully utilize both of these features.