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Texas Instruments 990 Maintenance Manual

Computer tv /eia interface module depot

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Operation manual (276 pages)

User manual (274 pages)

Manual (211 pages)

Table Of Contents

Table of Contents

Table of Contents
Equipment Overview
TTY/EIA Terminal Interface Module
Transmit Mode
Receive Mode
Interrupt Response
Character Format
Diagnostic Mode
Physical Characteristics
Electrical Characteristics
Module Address
Section II. Installation
General
Unpacking
Inspection and Perparation for Installation
Installation
General
Programming
Interrupts
Status Transitions Affecting New Status Flag
Timing Considerations
Output Operation
Output Character Transfer
Output Character String Sample Routine
TTY /EIA Terminal Interface Module Detailed Functional Block Diagram
DATACLK Baud Rate Selection
Active Address Decoder Output for CRUBIT,12-15
Receive Go Flag
TTY /EIA Receive Switch
EIA Line Receivers
Receive Buffer Register
Detailed Interface Discussion
Full Duplex TTY /EIA Module-To-Model 990 Computer Interface
Full Duplex TTY/EIA Module-To-Current Loop Device Interface
Full Duplex TTY/EIA Module-To-EIA Device Interface
Module Operation
Preparation to Transmit
Data Transmission
Data Reception
Troubleshooting Procedures
Scoping Loops
Transmit Go Flag Timing
Transmit Shift Clock Generation
Transmit Bit Counter Signals
Transmit Shift Register Signals
Receive Bit Counter Signals
Input Operation
Error Detection
Block Diagram Description
Address Decoder
Interrupts
General
Input Character Transfer
Echo Character Sample Routine
Receive Transition Detector
Receive Shift Register
Multiplexer
Model 990/4 Computer Hot Mock-Up System
Model 990/10 Computer Hot Mock-Up System
Timing Error Flag
Testing
Special Test Equipment
Transmit Shift Register Logic
Troubleshooting Procedures

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TEXAS INSTRUMENTS

Improving Man's Effectiveness Through Electronics

~--------"'

Model 990 Computer

ITV /EIA Interface Module

Depot Maintenance Manual

MANUAL NO. 945408-9701

ORIGINAL ISSUE 1 MARCH 1976

REVISED AND REISSUED 1 MAY 1977

INCLUDES

CHANGE 1 . . . . . 1 DECEMBER 1978

Digital Systems Division

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Texas Instruments 990 Maintenance Manual

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