444-364

Custom Mask ROM integrated circuit (IC) utilized by Zenith Data Systems and Heathkit computer hardware.Component BreakdownManufacturer Part Number: 444-364Component Type: Read-Only Memory (ROM) Chip / Firmware ICPrimary Application: Used in microcomputer training systems, specifically appearing in configurations of the classic Heathkit / Zenith ET-3400 / ET-3400A microprocessor trainers. It acts as the storage medium for the machine's factory monitor program or operating instructions.