Cunix kernel
============

# Versions
`0.362s-boot`:  
    `Boot` read `loader` from `boot-device`, then it jumps to it.  
    Loader doesn't load anything, it just enable long-mode and paging.  
    Loader defines temporary page table at `0x70000` (0x0000:0x7000),  
    it uses `2MB` page to make 0-12 MB memory to `0x0000 - 0xc0000`.  


`0.385s-boot`:  
    rebuild `boot` and `loader`.  


`0.391s-boot`:  
    `loader` forgot open A20 line, so `0.385` and `0.362` just can
    use 1MB memory like real-mode.  


`0.432s-boot`:  
    make directory `include/`, and add segment.inc, but it doesn't work. :-)  


`0.451s-boot`:  
    `boot` can load 8 sectors (4KB) of loader (not 1 sector).  


`0.466s-boot`:  
    rebuild `boot`
    

`0.487s-boot`:  
    `loader` let FS can access 4GB memory in real-mode. because 
    `loader` loaded GDT and load a data-segment to fs, then disable
    protect-mode. 


`0.484s-boot`:
    let `readdisk.inc` smaller, but we just can use CHS or LBA, not both. 


`0.509s-kernel`: 
    load kernel to 0x8200-0x9200 for 4KB, kernel.asm display 'K' to screen. 

`0.556s-int`: 
    init IDT at 0x0000-0x1000, and set all handler at `ignore_int`, but it do nothing. 

`0.619s-boot`: 
    load 180KB of disk, not 4KB