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INTELLEC
Hardware reference manual
Intel INTELLEC Hardware Reference Manual
Double density, diskette operating system
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Contents
Table of Contents
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Table of Contents
Table of Contents
Introduction
1.1 System Overview
The Channel Board
Diskette Drive Performance Specifications
1.2 Recording Format
Track Format
1 Introduction
Data Address Mark
Deleted Data Address Mark
Physical Data Format
Byte Representation
Data Bytes
Bit Cell
Data Bit
ID Address Mark
Index Address Mark
Data Address Mark
Deleted Data Address Mark
Operational Summary and Programming Considerations
Diskette Operations
Read Result Byte
Sector Format
2 Operational Summary and Programming Considerations
I/O Parameter Block
I/O Parameter Block (Iopb) Format
Interrupt Control Bits
Seek
Format
Recalibrate
Error Indications
Functional Organization of the Channel Board
Channel Board
Channel Command Block
3 Channel Board
3.2.2 Micro Control Unit (MCU) Block
Ago Input Selection
3001 Microprogram Control Unit: Functional Block Diagram
Microinstruction Bit Assignments
3.2.3 Microprogram Memory Block
Control Pulses and Levels Generated by Microprogram
3002 Central Processing Element: Functional Block Diagram
Data/Clock Shi Ft Register
Block
Data Flow Control Block
Schematics/Pin Lists: Channel
Pin List: P1 Bus Connector
Pin List: P2 Controller Connector
Pin List: P2 Controller Connector
The Interface Board
Functional Organization of the Interface Board
4 Interface Board
Interface Board: Functional Block Diagram
Theory of Operation: Interface Board
Disk Drive Control
Head Movement Control Timing
Write Data Generator
Read Initiate Timing
Serial Data/Clock Synchronization
Cyclic Redundancy Check
Bus Control
Bus Control Timing
Schematics/Pin Lists: Interface Board
Clk1/ and Clk2/ Timing
Pin List: P1 Bus Connector
J1 Drive Connector
Functional Description
5 Diskette Drives
5.2 Performance Characteristics
5.2.1 Recording Characteristics
5.2.2 Bit Transfer Rate
Data Capacity
Latency Time
Positioning Characteristics
Fdd Start and Stop Time
Error Recovery
Environmental Limits
Write Protect
Interface Specifications
Fdd Driver/Receiver Circuits
Write Data Timing
Diskette Cartridge Storage and Handling
5.5 Diskette Cartridge Write Protect Notch
5.6 Additional Information
Diskette System Microprogram
Introduction
Microprogram Module Description
Load Ma Lower
Load Ma Upper and Start I/O
Iopb Loader/Op Decode
Verify/Read
Write Deleted/Write
Address Parameter Checker
Read Next Memory Word
Write Data Field
Write Current Check
Address Mark Detect
Head Stepper
Read Disk Byte
Process Address Field
Write Address Field
Utilization
7.1 Environmental Extremes
7.2 Mounting Recommendations
Base Address Selection
Interrupt Level Selection
Connectors on the Channel and Interface Boards
7 Utilization
Operating Characteristics
Ac Characteristics
8 Operating Characteristics
Slave Command Timing - Fdcc
Diskette Operating System/Intellec Bus Ac Characteristics
Bus Exchange Timing
DC Characteristics
Diskette Operating System DC Characteristics (Intellec Bus)
Interface)
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INTELLECT DOUBLE DENSITY
DISKETTE OPERATING SYSTEM
HARDWARE REFERENCE MANUAL
Copyright © 1977 Intel Corporation
Intel Corporation, 3065 Bowers Avenue, Santa Clara, California 95051
Order Number: 9800422-01
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