Hi Eddiie,

I'm by far not experienced enough with CBMs to figure out the issue. If however someone comes up with a fix I'm happy to productize it (if necessary) and integrate it into the Contiki 2.x code line.

Best, Oliver

Looking at the SuperCPU unit itself, you'll notice that there is a red LED on it marked "TURBO". This lets you know that the SuperCPU is running along at 20Mhz. If sometimes goes off when the disk drives are running (as it has to drop to 1 Mhz to do this). It often flashes if the SuperCPU is forced to flip between the two modes during operation.

It seems that the SCPU too has to drop down to 1Mhz for cetrain things (disk IO), I remember someone else saying this or something like it, as a fix to the 2Mhz issue. So, I guess that might be the same thing?