
5. Theory of Operation
This chapter specifies other information about the operation of the EPC-7 that might
be useful to the system designer. The block diagram below shows the overall data-
path structure of the EPC-7. Note that numbers in parentheses denote the data width
of the path.
486
RadiSys data-
path switch
gate array
(pair)
VXIbus
VXI gate
arrays and
control logic
BIOS
Serial and
parallel port
controller
8242
controller
ATU
ASIC
Reset switch
Battery
Speaker
(DMA, interrupt ctrl,
clock, timers,
control, reset logic)
DRAM
SCSI
controller
Floppy
disk
controller
IDE
disk
interface
(32)
(16)
(64)
EXM
(16)
(32)
(8)
(16)
(8)
Expansion
Interface
keyboard
VXI
bus
5
5
Figure 12. Data Path Block Diagram.
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