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Manuals
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DEC Manuals
Printer
LP20
System manual
DEC LP20 System Manual
Line printer
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Contents
Figures
Tables
Introduction
Specifications
Functional Description
LP20 Line Printer System Simplified Functional Block Diagram
Physical Description
Typical LP20 Controller Assembly Mounting
Applicable Documents
Installation
Equipment Unpacking
Unpacking the Line Printer
Inspection
Installation Procedures
Installing the Line Printer
Module Configuration
Installing a Single LP20 Controller
AC Power Checkout Procedures for LP20 Line Printer Systems
System Checkout Procedure
Operation
Programming
Operational Modes
Loading the RAM
Loading the DAVFU
Typical Bit Patterns
Printing Characters
Test Mode
Device Registers
Translation RAM
CSRA Bit Interpretation
CSRB Bit Interpretation
Translation RAM Bit Interpretation
Vertical Format Instruction
Local Initialize
Error Reset
Data Multiplexer
Control and Status Register a
Character Buffer
Column Counter
Checksum
Printer Mutliplexer
Illegal or Undefined Characters
Memory Parity
RAM Parity
Programming Example
LP20 Sample Prorgam
Technical Description
Logic Diagrams
IC Complement
Detailed Theory
Printer Interface Signals
Unibus Interface Signals
Modes of Operation
Controller Initialization
Printer Power-Up Sequence
Placing the Printer On-Line
Printer Demand
Reading and Writing Controller Registers
LP20 Address Select Comparator
Addressable Registers
Interrupts
Bus Request Priority Plug Jumper Connections
RAM Load
Setting up Bus Address Register
Setting up Byte Counter
Setting up Control Bits for RAM Load
Setting up GO Flip-Flop
Executing an NPR
Writing the RAM
RAM Parity Generating Logic
Translation RAM Simplified Schematic
Print Mode
Printable Characters
Character Processing
Horizontal Tab Character
Escape Sequence
Error Conditions
Printer off Line
Paper Instructions
Preventive Maintenance
Printer Descriptions
LP05 Line Printer
LP07 Line Printer
LP07 Interface Signals
LP07 Printer Specifications
LP200 Charaband and Ribbon Options
LP0 Space Requirements
LP10 Line Printer
LP10 Line Printer General Description
LP14 Line Printer
ASCII Character Set
64 Data Processing Character Set
96 Data Processing Character Set
Printer Code Chart
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