The PC87366, a member of National Semiconductor's 128-pin LPC SuperI/O family, combines National’s System Hardware Monitoring capability with a Musical Instrument Digital Interface (MIDI) Port and game port inputs for up to two joysticks. The PC87366 is PC99 and ACPI compliant, and offers a singlechip solution to the most commonly used PC I/O peripherals. System Hardware Monitoring provides minimum power consumption and maximum operating efficiency within the system environment. It integrates National's diode-based or thermistorbased Temperature Sensor (TMS) with National’s Voltage Level Monitor (VLM) for full, PC system thermal control. The PC87366 monitors system voltages using 8-bit Analog to Digital (A/D) conversion with seven analog input channels and four internal measuring points. The PC87366 also incorporates: Fan Speed Control and Monitor (FSCM) for three fans, extended wake-up support for a wide range of wake-up events, system design protection features, a Floppy Disk Controller (FDC), a Keyboard and Mouse Controller (KBC), a full IEEE 1284 Parallel Port, two enhanced Serial Ports (UARTs), one with Infrared (IR) support, ACCESS.bus Interface (ACB), System Wake-Up Control (SWC), General-Purpose Input/Output (GPIO) support for 40 ports, Interrupt Serializer for Parallel IRQs and an enhanced WATCHDOG timer (WDT).