the "only memory", cant be, because they have a proper switch (the red ones) :-D
Switch Function
1 Enable / Disable Hard Drive
2 Enable / Disable RAM
3 Kickstart 1.2 / Kickstart 1.3
4 Reserved
5 Reserved
6 SCSI ID 0xx / 1xx
7 SCSI ID x0x / x1x
8 SCSI ID xx0 / xx1