Jumper Default Description

J2 SHORTED 68030 Enabled

J3 OPEN MMU Enabled

J7 OPEN RESERVED

J8 OPEN ROM Type (should not be changed)

J9 SHORTED ROM Enabled (should not be changed)

J10 OPEN RESERVED

J13 OPEN RESERVED

J14 ===> OPEN if SCSI drive is connected; otherwise CLOSED

J15 OPEN RESERVED

CN7 PINS 1&2 RESERVED

CN14 PINS 2&3 RESERVED

CN15 PINS 1&2 RESERVED

CN16 PINS 2&3 68882 FPU uses CPU clock

Jumpers specific to the 25MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 SHORTED RESERVED

J6 OPEN RESERVED

J11 OPEN RESERVED

J12¹ SHORTED Bank 1 or 2 as Autoconfig RAM

CN8 PINS 2&3 RESERVED

Jumpers specific to the 40MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 OPEN RESERVED

J6 SHORTED RESERVED

J11 SHORTED RESERVED

J12¹ SHORTED Bank 1 & 2 as Autoconfig RAM

CN8 OPEN RESERVED

Jumpers specific to the 50MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 SHORTED RESERVED

J6 SHORTED RESERVED

J11 OPEN RESERVED

J12¹ SHORTED Bank 1 & 2 as Autoconfig RAM

CN8 PINS 1&2 RESERVED

1 When jumper J12 is OPEN, ALL banks of RAM are placed into the Extended memory range, beginning at $1000000. With jumper J12 CLOSED, the top two banks are placed into Autoconfig range, beginning at $200000. The exception to this is the 25MHz accelerator: if J12 is CLOSED and no 4MB SIMM is in the top SIMM connector (CN11), then the 1MB on the card is Autoconfig. If there is a 4MB SIMM in CN11 and J12 is CLOSED, then the 4MB SIMM is Autoconfig and the 1MB on the board is Extended.

Jumper Default Description

J2 SHORTED 68030 Enabled

J3 OPEN MMU Enabled

J7 OPEN RESERVED

J8 OPEN ROM Type (should not be changed)

J9 SHORTED ROM Enabled (should not be changed)

J10 OPEN RESERVED

J13 OPEN RESERVED

J14 ===> OPEN if SCSI drive is connected; otherwise CLOSED

J15 OPEN RESERVED

J16 OPEN DTACK Pull-up Disabled; Enabled when CLOSED

CN7 PINS 1&2 RESERVED

CN14 PINS 2&3 RESERVED

CN15 PINS 1&2 RESERVED (PINS 2&3 with ROM versions before 4.5)

CN16 PINS 2&3 68882 FPU uses CPU clock

Jumpers specific to the 25MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 SHORTED RESERVED

J6 OPEN RESERVED

J12¹ SHORTED Bank 1 or 2 as Autoconfig RAM

CN8 PINS 2&3 RESERVED

CN17 PINS 2&3 RESERVED

Jumpers specific to the 40MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 OPEN RESERVED

J6 SHORTED RESERVED

J12¹ SHORTED Bank 1 & 2 as Autoconfig RAM

CN8 OPEN RESERVED

CN17 PINS 1&2&3 RESERVED (NOTE: ALL pins are CLOSED)

Jumpers specific to the 50MHz accelerator

Jumper Default Description

J4 SHORTED RESERVED

J5 SHORTED RESERVED

J6 SHORTED RESERVED

J12¹ SHORTED Bank 1 & 2 as Autoconfig RAM

CN8 PINS 1&2 RESERVED

CN17 PINS 2&3 RESERVED

1 When jumper J12 is OPEN, ALL banks of RAM are placed into the Extended memory range, beginning at $1000000. With jumper J12 CLOSED, the top two banks are placed into Autoconfig range, beginning at $200000. The exception to this is the 25MHz accelerator: if J12 is CLOSED and no 4MB SIMM is in the top SIMM connector (CN11), then the 1MB on the card is Autoconfig. If there is a 4MB SIMM in CN11 and J12 is CLOSED, then the 4MB SIMM is Autoconfig and the 1MB on the board is Extended.