I just bought this card.
To turn off the SCSI ROM you have to remove jumper from J4.
The delay of booting will be shorter. It is still possible to use a SCSI devices, but doesn't boot a hard drive.
J2 only have to remove, if you 're using 4 MB SIMMs.
J1 only have to remove, if you 're using the PCMCIA port.
CN2 Only have to remove, if you don't have a FPU crystal.
The other jumpers J3, J5 to J7, CN1, CN3 to CN4 are reserved don't change the jumper settings.