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FastOS
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boot.asm
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56 lines (47 loc) · 1002 Bytes
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BITS 16
start:
mov ax, 07C0h
add ax, 288
mov ss, ax
mov sp, 4096
mov ax, 07C0h
mov ds, ax
; 设置文本模式为80x25
mov ax, 0x0003
int 0x10
; 设置光标位置
call set_cursor_position
; 无限循环,接收用户输入并显示
.input_loop:
mov ah, 0x00
int 0x16 ; 等待键盘输入
cmp al, 0x0D ; 检查是否为Enter键
je .newline ; 如果是Enter键,跳转到换行
mov ah, 0x0E
int 0x10 ; 显示字符
jmp .input_loop
.newline:
call move_to_next_line
jmp .input_loop
move_to_next_line:
; 获取当前光标位置
mov ah, 0x03
mov bh, 0
int 0x10
; 计算下一行的光标位置
inc dh ; 行号加1
mov dl, 0 ; 列号重置为0
; 设置新的光标位置
mov ah, 0x02
int 0x10
ret
set_cursor_position:
; 设置光标位置为左上角
mov ah, 0x02
mov bh, 0
mov dh, 0 ; 行
mov dl, 0 ; 列
int 0x10
ret
times 510-($-$$) db 0
dw 0xAA55
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