Clear MBR
A:\>DEBUG
-f 200 l8000 0
-a
1856:0100 mov ax, 033f
1856:0103 mov bx, 200
1856:0106 mov cx, 1
1856:0109 mov dx, 80
1856:010C int 13
1856:010E int 3
1856:010F
-g (這會清除 Cylinder 0, Head 0, Sector 1 開始的 63 sectors, 就是 MBR)
-a 109
1856:0109 mov dx, 180
1856:010C
-g=100 (這會清除 Cylinder 0, Head 1, Sector 1 開始的 63 sectors, 就是 Boot Sector)
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