Service manual

4.3 KA64A Functional Description
The <REFERENCE>(XRP) processor has four functional
sections (see Figure 4–3): the CPU section, the backup cache,
the XMI interface, and the console and diagnostics sections.
Figure 4–3: <REFERENCE>(XRP) Block Diagram
Cache
Control
XMI
Inter-
face
XCI
Inval-Bus
Clock
XClock
XLatch x 7
XMI
Corner
XMI Bus
Cache
Control
Addr
Data
Data and Address Lines
Control
Float-
ing
Point
System
Sup-
port
CPU
with
Cache
Data
Addr
ROM
and
EEPROM
System and
Aux Console
msb-0181-89
VIB
To Vector
Module
4–6 VAX 6000 Models 300 and 400 Service Manual