The MC143421 PCI Bus Interface chip is a low cost and highly
integrated PCI interface solution that includes Advanced
Configuration Power Interface (ACPI) features. It is designed to
enable the addition of a PCI interface to PC peripherals such as
DSP-based analog modems.
The Peripheral Interface Bus (PIB) that interfaces this device to
the PC peripheral function provides four address lines, byte-wide
data, and eight programmable lines that can be used for chip selects,
interrupts, and power-down enable.