How to Design, Build & Program your Own Advanced Working Computer System

Cover
Introduction
1 Review Of The Microprocessor Field: Advanced Systems Concepts
	Microcomputer Trends
		Magnetic Disk
		The Importance of Hard Copy
		Other Major Developments
	Components
	Hardware Support
	Software
	Publishing
	The Build-or-Buy Decision
	Basic Concepts for The Advanced System
	Overall Approach to System Expansion
	Review of Original Design Boards
2 New Fast Memory Cards: Improved Construction Techniques
	High Capacity Board Techniques
	Cheap Video
	The TRS-80 Video System
	A Multiprocessor Video Technique
	Preliminary Design of New Memory Boards
	Circuit Design for the 2K Board
	Circuit Design for the 8K Board
	Board Construction
		Layout
		Soldering
		Etch Resist
	Checking the Finished Boards
		Bench Checks
		Operating Checks
3 A NIBL-Based Operating System
	Data Flow Routing
	Hardware Control Requirements
	OS Programs
	NIBL Capabilities in the Direct Execution
	NIBL as an Operating System
	Extending NIBL OS Capability
	NIBL and Peripheral Control
	Typical OS Program Features
	Relocating NIBL
	Modifying NIBL
4 ROM Cards, NIBL in ROM and NIBL Extension
	Circuit Design
	NIBL in ROM
	A NIBL, NIBL MOD, and EPROM Design
	Alternate Circuit Selection
	Extending Memory Address Space
	Using Specialized Preprogrammed ROM
	Building Your Library of ROM
	ZIBL-A NIBL Derivative
	NSC Tiny Basic
	Nonportability Problems
5 Hard-Copy Devices for I/O
	Hardware Character Extension
	Software Character Extension
	The Internal Computer Character Set
	Code Conversion
	Headers and Leaders
	Eliminating Other Baudot Machine Disadvantages
		Eliminating the Odor
		Cutting Down on Noise
		Pondering Size
	Paper Tape for Input and Slow Memory 11
	Standard Output Formats
	Alternate Teleprinter Connections
	Conversion to RS-232 Signals
	Use of Eight-Level Teleprinters
	Adding Machine Printers
	Note on Record Permanence 1
6 A Tape Cartridge Data System and Its Controls
	Cartridge Tape System Decisions
	The Basic Record-Reproduce-Circuit
	Basic Control Circuits
	Board Construction
	Interconnect Cabling
	Tape Deck Preparation
	Head and Other Adjustments
	Tape
	Formatting the Tape Records
	Programming for Tape Operations
	Maintenance
	Alternatives to Cartridge Recording
	Mounting the Tape Decks 1
7 PROM Programming
	Review of PROM Characteristics
		The 2708
		The 2716
	Review of Programmer Design
	EPROM Burner Circuit Design
	Board Construction
	Modification to Computer Control Panel
	Board Check
	The PROM-Burner Program
	Programming the EPROM
	EPROM Erasing
	Alternate Designs
	Notes on OS Programming: Structured Programming
8 An Auxiliary Processor Panel and Its Programs
	Alternatives to Computer Math Units
	Basic Characteristics of Calculator Chips
	Computer Arithmetic Chips
	Obtaining Chips and Data
	Design of a Universal Calculator-Processor-Board 186
	Circuit Design
	Board Construction
	Calculator Panel Precheck
	The Calculator Subpanel
	Subpanel Construction, Test and Installation
	Final Checkout
	Software for the Computer Panel
	Special Number Processor Designs
9 Using Other Microprocessors
	The INS-8073 Architecture
	The INS-8073 Instruction Set
	The Z80 Architecture
	The Z80 Instruction Set
	Comparison of Addressing Modes
	Bus Assignments and Characteristics
	Timing Signal
	Board Use of Signals
	Bus Assignment for Three CPU Board Designs
	Board Design for the 8073
	A Z80 CPU Board Design
	Alternatives—Purchased Designs
10 Multitasking, Multiprogramming and Multiprocessing
	Time-Shared Systems
	Nomenclature and Time-Sharing System
	Multiprogramming and the Home Computer
	Multiprocessing and the Home Computer
		Loose Coupling
		Tight Coupling
		Shared-Resource Multiprocessing
		Summing Up Multiprocessing
	Multitask Operation and the Small Computer
	Interrupts
	Bus Control
	Why a Home System?
Appendix
	SC/MP Bootstrap Loader
	SC/MP Subroutine Supervisor
	Block Transfer
	Hexadecimal Memory Dump
	Reverse Polish Tape Loader
	Punch Complemented Binary PROM Tape
	Quad Square Root
	Double Unsigned Multiply
	Fifteen-Bit Square Root
	SC/MP Editor
	PLOT
	SC/MP Disassembler
	Word Game
References
Index