Performance Computer PT-VME161 User Manual page 6

Table of Contents
SCSI device grounds ............................................................................................ 24
Device addresses ....................................................................................................... 25
Serial Port Cabling
Example...................................................................................................................... 25
Mechanical restraints.................................................................................................. 26
Section 3 FUNCTIONAL DESCRIPTION
Microprocessor
Memory
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DRAM ......................................................................................................................... 28
DRAM Mapping..................................................................................................... 29
Sizing .................................................................................................................... 29
Parity .......................................................................................................................... 30
Checking ............................................................................................................... 30
Initialization ........................................................................................................... 31
Testing .................................................................................................................. 31
PROM/SRAM Sockets................................................................................................ 31
Nonvolatile SRAM and Time of Day/Calendar Clock ................................................. 31
Serial EEPROM.......................................................................................................... 31
Interval Timer
VMEbus Interface
SCV64 ........................................................................................................................ 33
VME 64 Transfers .................................................................................................. 33
Transfer Modes ..................................................................................................... 33
Decoupled........................................................................................................ 33
Atomic.............................................................................................................. 34
VMEbus Control Logic .......................................................................................... 34
VMEbus Slave Accesses ...................................................................................... 35
SCV64 register access from the VMEbus ....................................................... 35
EPAK access from the VMEbus ...................................................................... 35
VMEbus Master Accesses .................................................................................... 35
68060 Accesses .............................................................................................. 35
Read-Modify-Write........................................................................................... 36
DMAC.................................................................................................................... 36
Location Monitor.................................................................................................... 37
Registers ............................................................................................................... 37
Test and Diagnostics............................................................................................. 37
Reset..................................................................................................................... 38
Local Bus Timer .................................................................................................... 38
Watchdog Timer.................................................................................................... 38
Tick Timer ............................................................................................................. 38
Register Block ....................................................................................................... 39
Interrupt Handler ................................................................................................... 39
vi Extensible Single Board Computer/Controller User's Manual
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