Ram Boards - HP 330 Service Handbook

Lower
Sy.nem Board
Address
Lower
010 II
Address
Upper
System Board
Address
Upper
010 II
Address
RAM
Block
Select
RAM
RAM
Address
Control
- t -
Signals
RAM Block
4,8, or 16MB
32 Bit Wide
+
4 Parity Bits
Includes
Buffers & MUX
Write
System
Board
Select
~
I
I_atch
I
I
System Board
r
Select
DIO II
Board
Select
~
010 II
Select
Parity
Bits
f+-
Parity
Check &
Generate
I
50MHz
Generato
Address
Select &
Autosize
IR7
from CPU
~
_ _ .... System Boord
Data
~
_ _ .... 010 II
Data
Bus
Clock