The AppleCD 300 Jumpers are:
Ground---------------------------------
1| 2| 3| 4| 5| 6| 7|
* * * * * * *
* * * * * *
8| 9| 10| 11| 13| 14|
Parity----- | | | | |--- Test Mode
0 2 3 |
SCSI Select Prevent/Allow
Parity Enabled (jumper installed)
SCSI ID Set to Apple specified ID
Prevent/Allow Allow manual eject switch (jumper installed)
Test Mode Disabled (no jumper)
Pin Signal
1 Ground
2 Ground
3 Ground
4 Ground
5 Ground
6 Ground
7 Ground
8 Parity
9 SCSI Select 0
10 SCSI Select 2
11 SCSI Select 3
13 Prevent/Allow
14 Test Mode