Personal Computer User Manual

ix
Contents
CHAPTER 1 BOARD LEVEL HARDWARE DESCRIPTION
Introduction.............................................................................................................1-1
Overview..................................................................................................................1-1
Requirements...........................................................................................................1-2
Features.....................................................................................................................1-3
Block Diagram.........................................................................................................1-4
Functional Description...........................................................................................1-6
Front Panel Switches and Indicators.............................................................1-6
Data Bus Structure...........................................................................................1-7
MC88110 MPU..................................................................................................1-7
BOOT ROM.......................................................................................................1-7
Flash Memory...................................................................................................1-7
Onboard DRAM...............................................................................................1-7
Battery Backup RAM and Clock....................................................................1-8
VMEbus Interface ............................................................................................1-8
I/O Interfaces...................................................................................................1-8
Serial Port Interface..................................................................................1-8
Printer Interface ........................................................................................1-9
Ethernet Interface......................................................................................1-9
SCSI Interface..........................................................................................1-10
SCSI Termination....................................................................................1-10
Peripheral Resources.....................................................................................1-11
Programmable Tick Timers...................................................................1-11
Watchdog Timer.....................................................................................1-11
Software-Programmable Hardware Interrupts..................................1-11
Processor Bus Timeout...........................................................................1-11
Local Peripheral Bus Timeout...............................................................1-11
Interrupt Sources............................................................................................1-12
Connectors......................................................................................................1-12
Memory Maps .......................................................................................................1-12
Processor Bus Memory Map ........................................................................1-12
VMEbus Memory Map..................................................................................1-15
VMEbus Accesses to the Local Peripheral Bus...................................1-15
VMEbus Short I/O Memory Map........................................................1-15