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12606B
Table 5·3. Data Channel Interface Card, 48·Pin Connector Signals
DATA CARD PIN
CONNECTED TO:
SIGNAL
SIGNAL
GROUND
SIGNAL
GROUND
BC
(B)
("not" bit clock, buffered)
DAT·oR
-
CMD-*R
-
CB (Control Bit FF)
DAT-*W
-
CMD-*W
-
eRA ("not" clear RPE and ABS FFs)
DAT··13
-
CMD-*13
-
CRf
("not" clear Run FF)
DAT-*Z
-
CMD-*Z
-
DI (Direction FF)
DAT·*T
-
CMD-*T
-
-
DI ("not" Direction FF)
DAT·*20
-
CMD·*20
-
DR (data read).
DAT·*23
DAT·*24
Jl0-P
J10·R
OW (data write)
DAT·*AA
DAT·*BB
J1O-M
J1O·N
EWR ("not" end-of·word, read)
DAT·*15
-
CMD-'15
-
--
EWW ("not" end-af·word, write)
DAT-*S
-
CMD-*S
-
-'-
EWW '''not'' end-of-word, write)
DAT-*n
-
CMD·*17
-
RFW (ready for first word)
DAT-*U
-
CMD-*U
-
RP (Read Parity FF)
DAT-*V
-
CMD-*V
-
I
RUN
DAT-'14
-
CMD·*14
-
--
STA ("not" strobe track address)
DAT-'19
-
CMD·*19
-
TAO (track address bit
0)
DAT-"
DAT-*2
Jl0-a
J1O-b
TAl !track address bit
11
DAT-'3
DAT-'B
JlO-c
Jl0-d
TA2 (track address bit 21
OAT·*4
DAT·*5
Jl0·e
J1O·f
TA3 !track address bit 3)
OAT·*6
OAT·*E
J10·h
J10-j
TA4 (track address bit 4)
DAT·"7
OAT·"8
Jl0·k
J10-m
TA5 (track address bit 5)
OAT·*9
DAT-*J
!
Jl0-n
Jl0·p
TA6 (track address bit 6)
DAT·*lO
OAT·o8
I
J10·r
Jl0·s
I
TA7 (track address bit 7)
DAT·*12
NC
NC
NC
TP ("not" track protect)
OAT·*16
-
CMO·*16
-
WRD \"not" Word FF)
OAT·*P
-
CMD·*P
-
NOTES:
.. OAT·· .. identifies a pin in the 48·pin connector for the data channel interface card.
"eM
D·'" identifies a pin in the 48·pin connector for the command channel interface card.
":ltC~"
identifies a pin in J10 on the disc memory.
"~\;
.. indicates no connection.
A
r'..;,\.~h
for a ground return indicates that the common ground return between cards is used (pins 1,2,85, and 86 of the 86-pin
c.onnectorl. All signals transferred between the two interface cards use the common ground return. Each signal transferred to
or from the disc uses a separate ground return, with the ground lead and signal lead forming a twisted pair.
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