Mercury 040

Processor: 040@28Mhz, 040@33Mhz or 040@35Mhz
FPU: Internal
MMU: Internal
Max Ram: 32MB
Ram Type: 4 x 30pin SIMM slots (Supports Static Column, Fast Page of Nibble RAM)

In order to use this card, you require at least Kickstart 2.04.

Jumpers

There are 5 banks of jumpers on the Mercury as follows.
(O = Open, X = Closed)

Jumper bank A (Memory Speed)

33Mhz 28Mhz Bank A
40ns 60ns X X
60ns 80ns X O
80ns 100ns O X

Jumper bank B (Memory Configuration)

Memory 1MB x 8 4MB x 8 Bank 0 Bank 1 Jumpers
0MB NONE NONE NONE NONE O X X X
4MB 4 NONE 1MB x 8 NONE O X O X
8MB 8 NONE 1MB x 8 1MB x 8 O X O O
16MB NONE 4 4MB x 8 NONE O O X O
20MB 4 4 4MB x 8 1MB x 8 O O O X
20MB 4 4 1MB x 8 4MB x 8 O O X X
32MB NONE 8 4MB x 8 4MB x 8 O O O O

Jumper Bank C (Processor Settings)

Jumper Open Closed
C1 Use the 040 on the accelerator (default) Use the motherboard processor
C2 Cache Disabled Cache Enabled (default)
C3 Off-Board Burst Mode Enabled Off-Board Burst Mode Disabled (default)
C4 On-Board Burst Mode Enabled On-Board Burst Mode Disabled (default)

Jumper bank D

Jumper Open Closed
D1 (Default) DO NOT CLOSE
D2 Fast ROM Enabled (default) Fast ROM Disabled
C3 Off-Board Burst Mode Enabled Off-Board Burst Mode Disabled (default)
C4 On-Board Burst Mode Enabled On-Board Burst Mode Disabled (default)

Jumper bank E is reserved.

Thanks to Thomas Newsom