In my low level assembler interrupt handler I'm detecting a Cause register value of 0x00800000. According to "See MIPS Run", the bit that is set should be zero - but I haven't been able to find any RM5231A documentation that defines this bit as anything else. Any ideas? BTW, the exception is raised under fairly heavy network traffic and in either disable_irq_nosync() or ei_start_xmit(). The latter is in the network card driver and itself contains a call to disable_irq_nosync(). I don't believe (although I may be wrong) that this was happening under the old style interrupt code. Thanks, Phil
