RadiSys EPC-8A, Справочник по аппаратуре

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EPC-8A Hardware Reference
30
Resident Flash memory (on the EPC-8A board) is I/O mapped and appears as an EXM
expansion module as if in EXM slot 31. SRAM is memory mapped. The PC BIOS is
shadowed into main memory at start-up.
Processor board
The EPC-8A processor board conforms with the VMEbus standard 6U form-factor.
Processor and Coprocessor
The Single-slot EPC-8A contains an Intel486 DX2 (32-bit bus interface) running at
66 MHz, with a built-in math coprocessor.
The Dual-slot EPC-8A contains an Intel486 DX4 (32-bit bus interface) running at
100 MHz, with a built-in math coprocessor.
VGA
32-bit VMEbus
Figure 4-1. Block Diagram
VME
byte swap
486 100MHz
option
FPM/EDO,
Parity DRAM
Video Display memory
R400EX System
Controller
(Kybd Ctlr, RTC)
BIOS SRAM
Buffer
Serial/Parallel
Controller
Ethernet
Buffer
Ethernet
Controller
Buffer
Flash
Controller
1MB Flash 1MB Flash
VME/VXI regs
and arbitration
16-bit EXM exp. Interface
32-bit local bus
32
32 16K
32
32 32
16
16
1–32 MB
512 K 128 K
16
16
16
8
8
8
8
8
16
8
8
8
8
8 bit X bus
Battery
Keyboard
Speaker
Reset Sw.
10BASE-T
RS-232 RS-485
Parallel
512 K