Specifications

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TABLE OF CONTENTS
CHAPTER 1 - INTRODUCTION
1.1 General Description .............................................................................................................. 1-1
1.2 Little Board/286 Features...................................................................................................... 1-3
1.3 Little Board/286 Specifications............................................................................................. 1-4
CHAPTER 2 - HARDWARE CONFIGURATION
2.1 Introduction........................................................................................................................... 2-1
2.1.1 Interface Connectors............................................................................................... 2-1
2.1.2 Jumper Configuration Options ............................................................................... 2-3
2.1.3 "Soft Configuration" Options ................................................................................. 2-3
2.2 DC Power Input..................................................................................................................... 2-4
2.3 Onboard Device Options and Configuration......................................................................... 2-6
2.3.1 CPU and Bus Half-Speed Options.......................................................................... 2-6
2.3.2 DRAM Memory...................................................................................................... 2-6
2.3.3 Math Coprocessor................................................................................................... 2-7
2.3.4 Byte-Wide Memory Sockets................................................................................... 2-8
2.3.5 Battery-Backed Clock............................................................................................. 2-10
2.4 Peripheral Connections and Configuration........................................................................... 2-12
2.4.1 Utility Connector .................................................................................................... 2-12
2.4.2 Keyboard................................................................................................................. 2-13
2.4.3 Parallel Printer Port................................................................................................. 2-14
2.4.4 Serial Ports.............................................................................................................. 2-16
2.4.5 Floppy Disk Interface ............................................................................................. 2-17
2.5 SCSI Interface....................................................................................................................... 2-20
2.5.1 Normal Use of SCSI............................................................................................... 2-21
2.5.2 The Ampro SCSI/BIOS.......................................................................................... 2-21
2.5.3 Simple Bidirectional I/O......................................................................................... 2-22
2.5.4 SCSI Interface Configuration ................................................................................. 2-22
2.6 AT Expansion Bus ................................................................................................................ 2-24
2.6.1 Onboard MiniModule Header and Bus Expansion................................................. 2-24
2.6.2 Using Standard PC and AT Bus Cards................................................................... 2-25
2.6.3 Expansion Bus Cable Considerations..................................................................... 2-26
2.6.4 Expansion Bus Connector Pinouts.......................................................................... 2-26
2.6.5 Interrupt and DMA Channel Usage........................................................................ 2-30