Service manual

6.4 MS65A Functional Description
The <REFERENCE>(xma2) consists of an XMI Corner, a
memory control gate array, address and control drivers,
block state DRAMs, DRAM arrays, and an EEPROM.
Figure 6–3: MS65A Block Diagram
Bank 2
Data
DRAMs
Bank 3
Data
DRAMs
Bank 1
Data
DRAMs
Bank 0
Data
DRAMs
MUX
msb-0730-90
To DRAM Array
Buffers
Block
State
DRAMs
Address/Control
EEPROM
Memory
Control
Array
XMI
Corner
PROM Bus
Diag Test Bus
XMI Bus
XCI
MUX SEL
6–6 VAX 6000 Models 300 and 400 Service Manual