System Specifications C-7 Diskette drive controller DP8473 and N82077 compatible 16 byte FIFO PS/2 diagnostic register support CMOS disk input and output logic High-performance digital data separator (DDS) PC-AT and PS/2 Drive Mode support. Keyboard and mouse controller — 8042A compatible,8-bit internal data bus.Serial Ports External 9-pin D-Sub serial port connectors Internal 10-pin keyed header 16540 & 16550A UARTs support data transfers up to921.6 Kbaud Extended UART mode supports data transfers up to 1.5Mbaud.Parallel Port External 25-pin D-Sub parallel port connector Supports Standard (AT-compatible), bidirectional (PS/2compatible), bidirectional Enhanced Parallel Port (EPP),and high-speed bidirectional Extended Capabilities Port(ECP) modes.