Table of Contents
iv
RAM Configuration............................................................................................. 22
Compatible RAM Devices................................................................................... 22
CMOS RAM Configuration ................................................................................ 23
Memory Mapping ................................................................................................ 24
I/O Configuration ............................................................................................................. 25
Using 8-Bit I/O Cards.......................................................................................... 25
Using 10-Bit I/O Cards........................................................................................ 25
Using 16-Bit I/O Cards........................................................................................ 26
COM2 Configuration........................................................................................................ 27
RS-232 Operation ................................................................................................ 27
RS-422 Operation ................................................................................................ 27
RS-485 Operation ................................................................................................ 27
Opto 22 Rack Configuration............................................................................................. 29
Rack Power Control............................................................................................. 29
Multiprocessor Configuration .......................................................................................... 30
Multiprocessor Jumper Configuration................................................................. 30
Resistor Pack Configuration................................................................................ 31
Multiprocessor CPU Reset .................................................................................. 31
Interrupt Configuration..................................................................................................... 32
Interrupt Configuration Jumpers ......................................................................... 33
STD Bus Interrupt Signals................................................................................... 34
CPU Interrupt Request Inputs.............................................................................. 35
Interprocessor Communications Interrupt Configuration ................................... 37
Non-maskable Interrupt Configuration ............................................................... 37
DMA Configuration.......................................................................................................... 38
DMA Channel Allocation................................................................................................. 39
Board Initialization ........................................................................................................... 40
82C836 Initialization ........................................................................................... 41
82C721 Initialization ........................................................................................... 42
486SXLC Initialization........................................................................................ 42
RAM Refresh Initialization ................................................................................. 43
4. Installation
.............................................................................................................................. 45
Introduction ...................................................................................................................... 45
Activating the Battery....................................................................................................... 45
Card Insertion and Extraction........................................................................................... 45
Card Installation .................................................................................................. 46
Card Placement.................................................................................................... 46
STD 32 Bus Installation Guidelines .................................................................... 46
External Connections........................................................................................................ 47
Connector Functions............................................................................................ 47
Connector Locations............................................................................................ 47
Mating Connectors and Cable Assemblies.......................................................... 48
Cable Assembly Diagrams .................................................................................. 49
J1, J4 – Serial Port Connectors............................................................................ 50
J2 – Digital I/O Connector................................................................................... 51
J3 – LPT1 Parallel Port Connector ...................................................................... 52
J5 – Counter/Timer - Digital I/O - Interrupt Connector...................................... 53
