Ardent Tool of Capitalism

Your go-to destination for everything IBM PS/2 and Micro Channel

7552 Resource Module

CR1 Run/Check
CR2 Speaker
J1-2 Keyboard
J3 DB15 Digital Output

Motorola MC146818 RTC + RAM
Motorola MC146823 CMOS Parallel Interface (CPI)

Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 05 Apr 2025 - Changelog | About | Legal & Contact