The NCR Criterion 8580 is a medium- to large-scale, general-purpose computer system that employs latest state-of-the-art technologies with virtual storage operation to set a new standard for data processing productivity. Advanced NCR Criterion hardware architecture has been enhanced by several features specifically engineered for larger online and multiprogramming operations:
Hardware Command Setup
The 8580 performs all command setup in hardware, including object code interpretation, indexing, operand modification, and register distribution. This technique results in faster internal throughput.
Four-way Memory Interleaving
Memory is interleaved so that each of four contiguous words is located in a separate module. This means that 8580 subsystems can read or write four contiguous words (16 bytes) without monopolizing any one module for more than a single memory cycle. As soon as one subsystem finishes accessing a module, that module is immediately available for access by another subsystem.
Enlarged Instruction Storage Unit
The Instruction Storage Unit (ISU) is a high-speed (56 nanosecond access time) memory used to store the firmware microcode that serves as an interface between hardware and software. In the 8580, ISU size is 32K bytes, so that more firmware microcoding can reside there for faster, more efficient operation.
The 8580 has been specifically designed to operate in a virtual storage environment under supervision of the powerful Virtual Resource Executive (VRX). Virtual storage systems effectively assign 16 million bytes of total job space to each program in a multiprogramming environment, regardless of actual memory size available, to optimize operations. The NCR Criterion 8580 with VRX offers the most advanced data processing and file management techniques at a cost that can be readily justified by increased performance and productivity. These techniques are complemented by high-performance hardware to provide more features, more flexibility, and more information for every dollar invested.
General Specifications
Standard
Processor Cycle Time 56 ns Main Memory (minimum) 1 megabyte Trunks 3 Virtual Storage
Options
Memory increments 1 megabyte Main Memory (maximum) 4 megabytes Trunks (additional) upto 5 Integrated Disk Control 2 Disk Strings on IDC 3 Spindles/String 8 Integrated Communications 20 lines Floating Point Assist
Languages
COBOL NEAT/3 NEAT VS FORTRAN NCR RPG
Paper Media File Peripherals
Card Readers upto 750 CPM Card Punches upto 450 CPM Paper Tape Readers upto 1500 CPS Paper Tape Punches upto 200 CPS MICR Sorter/Reader up to 1200 DPM
Terminals
Thermal Printers Financial Terminals Retail Terminals Commercial Terminals Medical Terminals CRT Display Terminals
Printers
Matrix Printers upto 55 LPM Line Printers up to 3000 LPM
Magnetic File Peripherals
Disk Units upto 200 million bytes per unit upto 885KB transfer rates Magnetic Tape Units 200 to 1600 BPI densities 40 to 320KB transfer rates 7 and 9 channels
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