IBM GA21-9124-1 3505 Card Reader and 3525 Card Punch Subsystem Mar71 free download

File name GA21-9124-1_3505_Card_Reader_and_3525_Card_Punch_Subsystem_Mar71.pdf

IBM 3505 Card Reader and IBM 3525 Card Punch Systems Subsystem This reference publication describes the IBM 3505 Card Reader with its self-contained control unit and the IBM 3525 Card Punch, which can be attached to the 3505 control unit. The manual describes the operation of the subject devices operating as a subsystem to the IBM System/370. The manual is designed for those having a basic knowledge of programming and computer opera- tions. The manual covers such subjects as device timings, throughput rates, features, commands, suggested error recovery procedures, and other programming and operating information. For additional information, refer to the Bibliography of the system to which the subsystem is attached. Second Edition (March 1971) This is a reprint of GA21