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General Description
1.1
GENERAL
This manual
provides unpacking, installation, testing, and operating information for the Texas
Instruments Model 990/10A Processor
(Figure 1-1 or Figure 1-1A). This section contains functional
and physical descriptions to acquaint the user with the hardware components and capabilities of
the Model 990/10A Processor, hereafter referred to as the 990/10A.
1.2
PURPOSE OF EQUIPMENT
The 990/10A is a single board replacement for the 990/10 processor. The 990/10A combines
a
990/10-compatible processor with a maximum
of 1.5 megabytes of error correcting memory, an
asynchronous
communications
port,
TILINE™
interface,
communications
register
unit
(CRU)
interface, and control logic for operation in a multiprocessor system. When combined in.a chassis
with appropriate peripherals for input, output, and mass storage, the 990/10A forms part of a stand-
alone minicomputer system.
1.3
EQUIPMENT DESCRIPTION
The 990/10A is a full-function processor on a single printed wiring board (PWB). Much of the discrete
circuitry of the 990/10
is incorporated
into custom
large
scale
integration
(LSI) devices
in the
990/10A,
resulting in lower cost and power consumption
with increased
reliability. The speed
in-
creases resulting from the single-board design of the 990/10A give an average 1.5 times increase in
throughput
over the 990/10, for most
applications. The following
paragraphs
describe
the major
components of the 990/10A.
TILINE is a trademark of Texas Instruments Incorporated.
2302633-9701
Change 2
1-1
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