The following chart is intended to be used only as a general guide to relative system performance. Due to the variety of configurations and processing environments, there can be no guarantee that an individual user will realize the relative performance shown in this chart. It is the customer's responsibility to determine how a 1100 will perform in his operation.
SYSTEM
Figure 3-1. Series 1100 Systems 3.2 1100/60 HARDWARE OVERVIEW
The 1100/60 is a general purpose processing system featuring the latest advances in systems design, packaging techniques, and programming technology.
The Central Processor and Input/Output Unit are functionally independent units housed in a single cabinet, resulting in low floor space, cooling and power
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externally housed in a separate cabinet. Unit or single processor system expansions include the addition of main storage; a high speed buffer to increase performance; an Extended Instruction Set, designed to enhance the performance of high-level languages and system software; and expansion to a completely redundant, tightly coupled multiprocessor system containing up to four central processors.
Multiprocessor system expansions include the addition of main storage, buffer storage, the Extended Instruction Set feature and additional central processors up to a maximum of four.
System Configuration
An 1100/61 Unit Processor System Central Complex is composed of a Central Pro-cessing Unit (CPU), an Input/Output Unit (IOU), a System Support Processor, optional buffer storage and main storage which can be either integrated with the central pro-cessing cabinet or externally housed in a separate, stand-alone cabinet. Unit Proces-sor systems with internal main storage may be configured with from 524K words minimum to 1048K word maximum. External main storage unit processor systems can be configured with 1048K words minimum to a maximum of 4195K words for "C"
models and up to a maximum of 8388K words for "E" and "H" models.
Unit processor systems may be expanded by adding 2K or 8K words of buffer storage and the Extended Instruction Set feature. Additional central complexes composed of a CPU, an IOU and 8K words of buffer storage may be added to a maximum of four in an 1100/64 configuration.
An entry level 1100/62 multiprocessor system provides a fully redundant central com-plex composed of two Central Processing Units, two Input/Output Units, two 2K word buffers, and two System Support Processors. Integrated main storage can be config-ured with 1048K words to 2097K words and configurations utilizing the external main storage may be configured with from 1048K words to a maximum of 8388K words.
The system may be expanded to 8K words of storage in each buffer and the Extended Instruction Set feature in each CPU. Additional central complexes may be added up to a maximum of four on the 1100/64 configuration.
The Central Processor Unit (CPU)
The 1100/60 design incorporates LSI Microprocessor chips and features micro-programmed control and arithmetic chips. Paralleled Arithmetic Logic Unit (ALU) chips are used to gain design flexibility, reduced size, and reliability. The 1100/60 instruction set is microprogrammed, utilizing a separate random access control store as the storage media. Reliability is enhanced through use of duplex checking, exten-sive parity generation and checking, control store error correction and instruction retry.
An optional Extended Instruction Set (EIS), designed to increase the efficiency of high level business oriented languages and system software, may be added to the central processor. It consists of a new set of instructions for data manipulation, data conver-sion, decimal arithmetic, and editing. System processors like ASCII COBOL, PLII, OMS 1100 and PLUS coded compilers have been modified to utilize the new
instruc-lect system profile hardware data and software performance data. The hardware data will provide utilization of individual hardware modules such as CPU busy and indi-vidual 1/0 channel activity, as well as interdependencies between them. The software related data will provide system or user software state information. Software utilities are provided to reduc"e the data collected and generate reports designed to assist in tuning a system for maximum performance.
The Input/Output Unit (IOU)
The 1100/60 IOU controls all transfers of data between the peripheral devices and main storage. Transfers are initiated by the CPU and executed by the IOU under a special channel program control. The IOU includes independent control paths to the CPU and data transfer paths to main storage. InputlOutput is through either byte channels, or word channels. The basic IOU contains one block multiplexer channel, and one word channel module which contains four word channels. Expansion features allow the addition of either two additional block multiplexer channels and one word channel module, or two word channel modules and one block multiplexer channel. This pro-vides a maximum channel capacity of either two block channels and twelve word chan-nels, or three block channels and eight word channels.
Buffer Storage
Buffer stoiage on the 1100/60 H models consists of 8192 words of high speed storage dedicated to interfacing its associated CPU with main storage. 1100/60 E models have 2048 words of buffer storage. This buffering of the interface between the CPU and main storage enables the system to achieve significantly higher performance.
Main Storage
The 1100/60 Integrated main storage unit contains 524K words of semiconductor storage, expandable in increments of 262K words to a maximum of 1048K words per unit. Multiprocessor configurations may expand to 2096K words of integrated storage.
The 1100/60 external main storage unit contains 1048K words of semiconductor stor-age expandable in increments of 1048K words to a maximum of 4195K words per unit.
1100/61 C1 and C2 models can be configured with a maximum of one main storage unit. The 1100/61 E and H processors and all multiprocessor systems can be config-ured with 2 main storage units for a maximum main storage capacity of 8388K words.
System Support Processor (SSP)
The SSP is a separate miniprocessor dedicated to performing support functions for the central processing complex. The principle functions of the SSP are to diagnose and maintain the central complex, handle the system console(s), and control partitioning of the system.
The System Console
The system console of the 1100/60 consists of a UTS 20 CRT and a 200 character per second bi-directional printer. Up to three system consoles ,and one system mainte-nance console may be supported by each System Support Processor.
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group of components for maintenance, or, in the case of multiprocesser systems, to divide the system into two operating entities.
Partitioning of central complex components (CPU, IOU, Buffer, Main Storage) is a standard feature of 1100/60 systems. Partitioning of peripheral subsystems is accom-plished by adding optional partitioning features to the system.