AT&T 3B2/300 Technical Reference Manual page 469

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
CM195K EXPANSION DISK CONTROLLER
PERIPHERAL INPUT/OUTPUT BUS INTERFACE
(BACKPLANE CONNECTOR)
1~
80186 CPU
,
SK X 16
AND
29
READ ONLY
MISCELLANEOUS
,
16
MEMORY
.
LOGIC CIRCUITS
16
.
,
16
oID/VECTOR
7
64K X 16
REGISTER
o PAGE REGISTER
DYNAMIC RANDOM
o PCSR
1~ -
ACCESS MEMORY -
,
-
ADDRESS
DATA
BITS 19-00[1] BITS 15-00[1]
I'"
---------------- ---
~-----------------
--,
HARD DISK INTERFACE
HARD DISK
CONTROLLER
CONTROL DATA CONTROL D ATA
ST-506
WRITE
DATA
CONTROL
PRECOMPENSA TION
SEPARATOR
CIRCUIT
CIRCUIT
, ' 14
!
DATA
f
DATA
DATA AND CONTROL DRIVER
AND RECEIVER CIRCUITS
CONTROL DATA DATA
l
I~
CONTROL DATA 0 DATA 1
CONNECTOR
CONNECTOR CONNECTOR
L---------------------------------------~
Figure 3-67: CM195K XDC Card - Functional Block Diagram
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