User guide

Figure 1–1 Digital Alpha VME 4 Block Diagram
Main
Memory
Data Path
4 chips
Cache and
Memory
Controller
CPU
sysBus 128 Bits
Interrupt
Controller
Flash
Super
I/O
Keyboard
and Mouse
Controller
Interval
Timer
TOY Clock
Watchdog Timer
NVRAM
(DS1386)
Nbus 8 Bits
PCI to
PCI Bridge
Ethernet
Controller
SCSI
Controller
PCI-VME
Bridge
PCI Bus 32 Bits
PCI/PMC
option 0 slot
VME Connectors
ML013270
Bcache
64
epiData
32
128
memdata
PCI/PMC
option 1 slot
PCI Host
Bridge
(21071-DA)
CPU Board
PCI to
Nbus
Bridge
I/O Board

PMC Expander Card
Product Overview 1–3