I am writting a program for target board which have a 486 cpu, 512K
ram(0x0 to 0x7ffff), 512k flash (0x80000 to 0xFFFFF).My program will
be burned into flash.
My program is to initialize the GDT, IDT, TSS, move them to memory.
Now I can enter protected model and mov GDT, IDT correctly.But when I
am about to mov TSS, some exception came out, and the CPU reset
automaticly. The code casue the problem is like this:
mov cx, gdt_idx
mov gs, cx
when cpu run to the instuction 'mov gs, cx', CPU will reset.
i can assure the value in cx is correctly.
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