NEC Advanced Personal Computer Manuals

NEC Advanced Personal Computer Manuals

Manuals and User Guides for NEC Advanced Personal Computer. We have 1 NEC Advanced Personal Computer manual available for free PDF download: System Reference Manual

NEC Advanced Personal Computer System Reference Manual

NEC Advanced Personal Computer System Reference Manual (276 pages)

Brand: NEC | Category: Desktop | Size: 13.77 MB

Table of Contents

Table of Contents
6
Preface

14
Chapter 1 Hardware Overview

16
- System Block Diagram
  17
Chapter 2 Processor Pcb

20
- Processor PCB
  20
- Processor PCB Block Diagram
  21
- Mother Board/Card Cage Interface
  22
- Card Cage Socket Contact Assignments
  23
- Interrupt Lines
  23
- Processor Timing
  27
- RFSH Signal Timing
  29
- Device Interface Circuits
  31
- Microprocessor
  32
- Direct Memory Access
  33
- DMA Instructions
  33
- DMA Command and Mode Registers
  35
- DMA Request and Mask Register
  36
- Interval Timer
  38
- DMA Status Register
  38
- Interval Timer Block Diagram
  38
- Interrupt Control
  39
- Timer Commands
  39
- Interrupt Control Block Diagram
  40
- Interrupt Control Commands Summary
  41
- Interrupt Initialization Command Words
  43
- Interrupt Operation Command Words
  44
- Memory
  45
  - System Memory Map
    45
  - Main Memory
    46
  - Main Memory Block Diagram
    46
  - Battery-Backed Memory
    47
  - Battery-Backed Memory Block Diagram
    47
  - Read Only Memory
    48
- Parallel Printer Control
  48
- Keyboard
  57
  - 2.8.1 Keyboard Layout and Scan Codes
    58
  - Keyboard Layout
    58
  - Interface
    60
  - Keyboard Interface
    60
- Calendar and Clock Generator
  61
  - Keyboard Interface Lines
    61
  - Circuit Description
    62
  - Clock/Calendar Block Diagram
    62
  - Clock/Calendar Instruction Format
    63
  - Programming Considerations
    63
  - Clock/Calendar Format
    64
- Jumper Settings
  65
Chapter 3 Controller Pcb

66

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