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34 lines
814 B
NASM
34 lines
814 B
NASM
; |==================|
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; | 这是loader程序 |
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; |==================|
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; Created by longjin, 2022/01/17
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; 由于实模式下，物理地址为CS<<4+IP，而从boot的定义中直到，loader的CS为0x1000， 因此loader首地址为0x10000
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org 0x10000
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mov ax, cs
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mov ds, ax ; 初始化数据段寄存器
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mov es, ax ; 初始化附加段寄存器
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mov ax, 0x00
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mov ss, ax ;初始化堆栈段寄存器
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mov sp, 0x7c00
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;在屏幕上显示 start Loader
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mov ax, 0x1301
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mov bx, 0x000f
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mov dx, 0x0100 ;在第2行显示
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mov cx, 23 ;设置消息长度
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push ax
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mov ax, ds
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mov es, ax
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pop ax
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mov bp, Message_Start_Loader
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int 0x10
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jmp $
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; 要显示的消息文本
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Message_Start_Loader: db "[DragonOS] Start Loader"
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len_Message_Start_Loader: db 23
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