This is an experimental Icarus-based bitstream for the Cairnsmore1, in several 
versions:

shortfin_dcmwd3_140_test.bit: 140 MHash/s per FPGA.
shortfin_dcmwd3_150_test.bit: 150 MHash/s per FPGA.
etc.

Please use a standard (non-Glasswalker2) bitstream on the controller and set 
your DIP switches as follows:

SW1: all switches to left
SW6: switch 1 (the bottommost one) to the right, all others to left.

SW2 and SW5: all switches in top position

SW3 and SW4: switch 2 in bottom position, all other switches in top position.

Whilst loading the bitstream it may help if you move switch 3 on SW1 (second
from top) to the right temporarily. Don't forget to change it back before you
start mining. This diagram by Lethos may help you:

https://bitcointalk.org/index.php?topic=94317.msg1073047#msg1073047

You can follow the instructions on the Cairnsmore1 webpage to load your chosen
bitstream, but it's probably faster to 

You'll need to connect your miner to it as two seperate Icarus boards. I hear 
getting miners to recognize the boards intially may be a bit unreliable and 
that software other than mpbm may not work, though this may be fixed now.

Good luck! I'd suggest starting with either the 160 MHash/s version or the 
overclocked 190 MHash/s version, which works on most boards with serial
numbers above 50. The 200 MHash/s one tends to produce too many invalids
on a lot of boards.

Warning: the reported MHash/s figures in your mining software may not be 
entirely accurate. You need to look at the U/m figure instead. For the 
190 MHash/s bitstream, this should settle at roughly around 5.3 after a 
few hours. If you're using MPBM, you can add this stat to the web interface
using ebereon's instructions here:

https://bitcointalk.org/index.php?topic=78239.msg1030353#msg1030353

