Specifications

EPC-8 Hardware Reference
Page iv
Video Controller ....................................................................................... 4-6
Ethernet Controller ................................................................................... 4-7
Resident Flash/SRAM Memory................................................................4-7
Resident Flash Memory .................................................. 4-7
SRAM.............................................................................4-7
Watchdog Timer ....................................................................................... 4-8
Battery ...................................................................................................... 4-9
Peripheral Ports ........................................................................................ 4-9
RS-232 Port..................................................................... 4-9
RS-422/485 Port.............................................................. 4-10
Parallel Port .................................................................... 4-10
Keyboard......................................................................... 4-10
Front Panel LEDs ..................................................................................... 4-10
Resetting the EPC-8.................................................................................. 4-11
Register State after Reset.......................................................................... 4-13
VME/VXI Soft RESET state and SYSRESET........................................ 4-13
Signal Register FIFO.........................................................................................4-14
EXM Expansion Interface................................................................................. 4-15
VME Interface .................................................................................................. 4-15
Connectivity.............................................................................................. 4-15
VMEbus System (Slot-1) Controller Functions ........................................ 4-15
VMEbus Access ....................................................................................... 4-16
Byte Ordering ........................................................................................... 4-16
VMEbus Interrupt Response..................................................................... 4-18
VME Extension Registers (VXI).............................................................. 4-18
Passing VME Interrupts and Events to the CPU ............................................... 4-19
Chapter 5 - Programming the VMEbus Interface ................................................. 5-1
Concepts............................................................................................................ 5-1
Atomic access........................................................................................... 5-1
Read-Modify-Write Operations................................................................ 5-2
Setting the VMEbus Access Bit ........................................................................5-2
Real-Mode “ E-page” VMEbus Accesses .........................................................5-3
Supported Address Modifiers............................................................................ 5-4
Low-Level Programming ‘‘E’’ Page Accesses.................................................. 5-4
Example #1............................................................................................... 5-4
Example #2............................................................................................... 5-6
Low-Level Handling of VMEbus Interrupts............................................. 5-7
Protected-Mode Direct VMEbus Accesses ....................................................... 5-10
Generating IACKs in Protected Mode...............................................................5-11
Programming the Watchdog Timer ................................................................... 5-11
Appendix A - Chip Set & I/O Map......................................................................... A-1
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