AT&T 3B2/300 Technical Reference Manual page 462

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CM195H CARTRIDGE TAPE CONTROLLER CARD
General
Figure 3-65 is a functional block diagram of the CMl 95H Cartridge Tape Controller (CIC) Card.
Functionally, the CIC card consists of the Common Input/Output (CIO) circuits and Cartridge
Tape/Floppy Disk Interface circuits. Driver and receiver circuits are used to interface one cartridge tape
drive and one floppy disk drive. Two devices can be connected to a Cartridge Tape Controller;
however, only one of the two devices can be accessed at a given time. The CIO circuits include the
following:
• INTEL 80186 Microprocessor
• Input/Output (1/0) Bus Control
• Identification/Vector (ID /Vector) Register
• Page Register
• Peripheral Control and Status Register (PCSR)
• Local Random Access Memory (RAM)
• Local Read Only Memory (ROM)
• Direct Memory Access Controller (AM 9517 A)
• Miscellaneous Circuits.
FUNCTIONAL DESCRIPTION 3-209