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J12 - MCBL199A1, CD-ROM Audio
Pin
Signal
1
Right Sound Channel
2
Ground
J41 - MCBL387, Internal Narrow Ultra SCSI
Pin
Signal
Pin
2
SD-(0)
16
4
SD-(1)
18
6
SD-(2)
20
8
SD-(3)
22
10
SD-(4)
24
12
SD-(5)
26
14
SD-(6)
28
Remaining pins are connected to ground.
J44 - MCBL194, Floppy Disk Drive
Pin
Signal
Pin
2
RPM
14
4
No connect
16
6
DRATE0
18
8
INDEX-
20
10
MTR0-
22
12
DRV1-
24
J51 - MCBL248, Power On LED (green)
Pin
Signal
1
PwrGood
2
Ground
J55 - MCBL250, Front Panel Power Switch
Pin
Signal
1
+ 5 V trickle
2
PWRBTN
Pin
Signal
3
Left Sound Channel
4
Ground
Signal
Pin
Signal
SD-(7)
30
Ground
SDP0-
32
SATII-
Ground
34
Ground
Ground
36
SBSY-
Reserved
38
SACK-
TPWR
40
SRST-
Reserved
42
SMSG-
Signal
Pin
DRV0-
26
MTR1-
28
DIR
30
STEP-
32
WDATA-
34
WGATE-
Pin
Signal
44
SSEL-
46
SCD-
48
SREQ-
50
SIO-
Signal
TRK0-
WRPRT-
RDATA-
HDSEL
DSKCHG
47
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