General Description

The ACT818 is a high-speed, general-purpose pipeline register with an on-board diagnostic register for performing serial diagnostics and/or writable control store loading.

Features

■ On-line and off-line system diagnostics

■ Swaps the contents of diagnostic register and output register

■ Diagnostic register and diagnostic testing

■ Cascadable for wide control words as used in microprogramming

■ Edge-triggered D registers

■ Outputs source/sink 24 mA

■ ACT818 has TTL-compatible inputs

■ ACT818 is functionally- and pin-compatible to AMD Am29818 and MMI 74S818

Applications

• Register for microprogram control store

• Status register

• Data register

• Instruction register

• Interrupt mask register

• Pipeline register

• General purpose register

• Parallel-serial/serial-parallel converter