Jumper Settings for the 22 Mhz. 030-Combo Jumper Default Description J3 OPEN Disables 68030 MMU when shortened. J4 SHORTED when no SCSI devices are connected. OPEN when SCSI drive is connected, to enable autobooting. J6 OPEN Disables 68030CPU and bootup in 68000 model when shorted. J7 SHORTED Reserved. 68030 Cache control. J8 OPEN Reserved. Select offset of code in EPROM. J9 SHORTED Disable EPROM code when open. J10 OPEN See RAM expansion tables in Chapter 3. All extended RAM when shorted. J13 SHORTED See RAM expansion tables in Chapter 3. Default is all Auto-Config RAM, 1MB SIMMs only. J11 OPEN Reserved J12 SHORTED Reserved J14 OPEN Reserved J15 SHORTED Reserved J16 OPEN Reserved J17 SHORTED Reserved J18 SHORTED Reserved J19 SHORTED Reserved J20 OPEN Reserved J21 Pins 1 & 2 Reserved. Jumper on Pins1 & 2 (bottom two pins). J22 SHORTED Reserved for future use. CN6 ---->> LED connector for SCSI drive. CN7 Pins 1 & 2 Reserved. Jumper on Pins 1 & 2 (top two pins). CN8 Pins 1 & 2 Reserved. Jumper on Pins 1 & 2 (top two pins).