• Micron MI9381A

82C381 CPU/AT Bus controller

The 82C381 provides system control logic and data bus conversion logic. The control logic consists of 386 CPU control logic, AT Bus cycle control, 387 Numeric Processor control logic, synchronous clock divide logic and control of the local peripheral bus. The data bus conversion logic consists of various 8, 16, 32 bit conversions for ROM cycles, AT bus cycles and memory cycles.

Versions:

• 82c381-25 (25Mhz)
• 82c381-33 (33Mhz)
• 82c381-B (20, 25, 33Mhz)
• 82C381P (???)