CHAPTER 1
Board Level Hardware Description
Introduction................................................................................................................1-1
Overview.............................................................................................................1-1
Related Documentation.......................................................................................1-2
Models Available ................................................................................................1-3
Document Requirements.....................................................................................1-4
Available Software..............................................................................................1-5
Required Equipment ...........................................................................................1-5
Features...............................................................................................................1-5
Specifications......................................................................................................1-7
Cooling Requirements ........................................................................................1-8
Manual Terminology.........................................................................................1-10
Block Diagram .........................................................................................................1-11
Functional Description.............................................................................................1-12
Switches and LEDs...........................................................................................1-12
ABORT Switch..........................................................................................1-12
RESET Switch ...........................................................................................1-12
Data Bus Structure ............................................................................................1-13
MC68XX040 Cache ..................................................................................1-14
Memory Options ...............................................................................................1-15
DRAM Options..........................................................................................1-15
SRAM Options ..........................................................................................1-15
SRAM Batteries.........................................................................................1-17
I/O Interfaces ....................................................................................................1-19
Ethernet Interface ......................................................................................1-20
SCSI Interface............................................................................................1-21
SCSI Termination ......................................................................................1-21
Contents
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