These plug in to the GPIO header (header "A", I believe, since there are two of 
them). So you use a standard GPIO yellow block with the "GPIO A" selection. 
Bits 0-7 should be valid.

Remember to set the extra direction bit to "output", as described here: 
http://casper.berkeley.edu/wiki/GPIO

Jason

On 09 Feb 2011, at 05:46, Peter wrote:

> Hi,
> 
> The on-board LEDs for ROACH 1 seem to be "mapped" to the "ROACH:led" GPIO
> block in Simulink, with bits 0-3 valid choices.
> 
> What is the Simulink "mapping" for the LEDs that are connected to header
> cables that lead to 8 LEDs on the front of the ROACH Motel?
> 
> Thanks,
> Peter
> 
> 
> 
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