Dear all, I have been trying to boot a kernel >= 2.6.33 without any success. After a few days looking at the issue I got some hints on what may be happening. When the OS boots an idle core, it sends the core an interruption with a memory address pointing to a trampoline code. Until version 2.6.32, this address was fixed at mem. address 0x6000. Now it does some kind of memory allocation, and the new address seems to be 0x10000. Requiring a larger jump than before. I have manually allocated the 0x6000 address for the trampoline and got a 2.6.33 kernel to boot, but with lots of memory corruption warnings. The main cause of the error lies in src/arch/x86/isa/insts/general_purpose/control_transfer/jump.py There is a "fault "new GeneralProtection(0)", flags=(CEZF,)" instruction after checking a segment address "andi t0, t2, 0xFC, flags=(EZF,), dataSize=2" Commenting this fault leads inmediately to another panic "Far jumps to system descriptors aren't implemented". Has anyone fixed this succesfully? Thanks a lot for your time.