
63
J11 - MCBLW680A, Serial Port 2
See pinouts for “Serial” below.
J12 - MCBL199A1, CD-ROM Audio
Pin
Signal
Pin
Signal
1
Right Sound Channel
3
Left Sound Channel
2
Ground
4
Ground
J41 - MCBL387, Internal Narrow Ultra SCSI
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
2
SD-(0)
16
SD-(7)
30
Ground
44
SSEL-
4
SD-(1)
18
SDP0-
32
SATII-
46
SCD-
6
SD-(2)
20
Ground
34
Ground
48
SREQ-
8
SD-(3)
22
Ground
36
SBSY-
50
SIO-
10
SD-(4)
24
Reserved
38
SACK-
12
SD-(5)
26
TPWR
40
SRST-
14
SD-(6)
28
Reserved
42
SMSG-
Remaining pins connected to ground.
J44 - MCBL194, Floppy Disk Drive
Pin
Signal
Pin
Signal
Pin
Signal
2
RPM
14
DRV0-
26
TRK0-
4
No connect
16
MTR1-
28
WRPRT-
6
DRATE0
18
DIR
30
RDATA-
8
INDEX-
20
STEP-
32
HDSEL
10
MTR0-
22
WDATA-
34
DSKCHG
12
DRV1-
24
WGATE-
J51 - MCBL248, Power On LED (green)
Pin
Signal
1
PwrGood
2
Ground