bug fix for setup_idt #19
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the setup_idt() has not configured default ISR for all interrupt. CPU lookup IVT and set 0x0:0x0 (cs:ip) as interrupt handler entry when received an unexpected interrupt which not setup ISR via set_realmode_int in setup_idt(). howerver, the 0x0:0x0 point to IVT-self and executing it caused invalid opcode exception, which the interrupt vector is 6, and the handler bios_intfake not fixing this problem, this makes CPU run into a infinite loop.
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the setup_idt() has not configured default ISR for all interrupt.
CPU lookup IVT and set 0x0:0x0 (cs:ip) as interrupt handler entry
when received an unexpected interrupt which not setup ISR via
set_realmode_int in setup_idt().
howerver, the 0x0:0x0 point to IVT-self and executing it caused
invalid opcode exception, which the interrupt vector is 6, and the
handler bios_intfake not fixing this problem, this makes CPU run
into a infinite loop.