David Griffith P112 Manuals

Manuals and User Guides for David Griffith P112. We have 1 David Griffith P112 manual available for free PDF download: Assembly And Operation Manual

David Griffith P112 Assembly And Operation Manual

David Griffith P112 Assembly And Operation Manual (52 pages)

Revision 1.1

Brand: David Griffith | Category: Motherboard | Size: 0.33 MB

Table of Contents

Table of Contents
3
1 Introduction

6
2 Cables and Components

9
- Cables
  9
  - Power Cable
    9
  - Terminal Cable
    9
  - Disk Drive Cable
    10
  - Parallel Port Cable
    10
- Complete List of Parts
  11
3 Construction

13
- Before Anything else
  13
- Getting Started
  13
- Soldering the First Parts
  14
- Soldering Everything else
  14
4 Setting up

16
- Jumper Settings
  16
- Terminal Settings
  17
- Disk Drives
  17
- Powering up
  18
5 Debugger

20
- Help Function
  20
- Set Breakpoint
  21
- Display / Set Memory
  21
- Go (Run Program)
  22
- Trace Instructions
  22
- Display / Set Registers
  23
- Loading Files
  23
- Input from Port
  24
- Output to Port
  24
- System Boot
  24
- Load os and Return to DEBUG
  24
- DS-1302 RAM Parameters
  25
6 Troubleshooting

27
- Stone Dead
  27
- Garbaged Sign-On Message
  27
- Disk Drive Won't Work
  27
- An Example
  29
7 Logic Description

30
- Cpu
  30
  - Serial Port
    30
  - Parallel Port
    31
  - Dma
    31
  - Memory Mapping
    31
- Memory
  32
  - Rom
    32
  - On-Board RAM
    33
  - Expansion RAM
    33
- IO Cycle Control
  33
- Real-Time Clock
  33
- Expansion Socket
  34
- Multi-I/O Chip
  34
  - Address Decoding
    34
  - Cycle Timing
    34
  - Safety Latch
    34
- Serial Port 2
  35
- Diskette Port
  35
- Printer Port
  35
8 Major Components

36
- CPU Chip
  36
- I/O Combination
  36
  - Port Addressing
    36
- Flash ROM
  37
- Realtime Clock
  37
9 Connector Pins

38
- P1 - RAM Size Selector
  38
- P2 - DMA Requests
  38
- P3 - Flash Bootload Selector
  38
- P4 - Serial Port 1
  40
- P5 - SYNC Jumper
  40
- P6 - Power Supply / Reset
  41
- P7 - Parallel Printer
  41
- P8 - Serial Port 2
  42
- P9 - Disk Drives 0 and 1
  43
- P10 - Disk Drives 2 and 3
  43
- P11 - Battery Isolator
  43
- P12 - ROM Pin-3 Function
  44
- P13 - RAM Pin-30 Function
  44
- P14 - Extra Serial Ports
  44
- J1 - Bus Expansion
  47

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