RadiSys EPC-5A, Hardware & Software Reference Manual

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EPC-5A Hardware & Software Reference Manual
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Advanced Menu ....................................................................................................37
EXM Menu............................................................................................................39
VME Menu............................................................................................................42
Exit Menu..............................................................................................................44
5. Theory of Operation ...............................................................................................47
Processor board .....................................................................................................47
Processor and Coprocessor ...........................................................................47
Core Logic.............................................................................................................47
Memory ........................................................................................................48
Memory Map ................................................................................................48
Peripheral Components .........................................................................................50
Real Time Clock....................................................................................................50
Keyboard Controller..............................................................................................51
ROM and ROM Shadowing ..................................................................................51
Embedded Shadow ................................................................................................51
Bootable Device Precedence .................................................................................51
Battery ...................................................................................................................52
Video Controllers ..................................................................................................53
Front Panel LEDs ..................................................................................................53
Resetting the EPC-5A ...........................................................................................54
EXM Expansion Interface .....................................................................................54
6. The VMEbus Interface ...........................................................................................57
Connectivity ..........................................................................................................57
VMEbus System (Slot-1) Controller Functions.....................................................57
Concepts................................................................................................................58
Memory Map ................................................................................................58
Direct VMEbus Accesses .............................................................................59
Byte Ordering ...............................................................................................60
Slave Accesses from the VMEbus ................................................................63
Self Accesses Across the VMEbus ...............................................................64
Read-Modify-Write Operations ....................................................................64
VMEbus Interrupt Response.........................................................................65
Registers Specific to the EPC-5A..........................................................................66
VMEbus Mapped Registers ..........................................................................77
Register State after Reset ..............................................................................78
Supported Address Modifiers................................................................................78
Low-Level Programming the VMEbus Interface ..................................................79
VMEbus Accesses ........................................................................................79
Low-Level Handling of VMEbus Interrupts .................................................82
7. Connectors...............................................................................................................87
Serial Ports ............................................................................................................87