AT&T 3B2/300 Technical Reference Manual page 255

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
Figure 3-1 is a high-level functional block diagram of the Version 2 3B2 computers (3B2/300, 310,
and 400). The following is a list of the major functional areas of Version 2 computers:
• Central Processing Unit (CPU) Microprocessor
• Memory Management Unit (MMU)
• Math Acceleration Unit (MAU) (optional)
• Dual Port Dynamic Random Access Memory (DPDRAM) Subsystem
• Direct Memory Access (OMA) Subsystem
• Input/Output (1/0) Bus
• Feature Card Connectors
• Miscellaneous Status and Control Signals
• Power and Alarm Circuits.
3-2 TECHNICAL REFERENCE MANUAL