写出能够在屏幕上显示字符串“HELLO WROLD!"的完整的汇编语言程序。
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发布时间：2024-10-04 09:38
共2个回答
热心网友
时间：2024-10-31 08:50
; by writing directly to video memory.
; in vga memory: first byte is ascii character, byte that follows is character attribute.
; if you change the second byte, you can change the color of
; the character even after it is printed.
; character attribute is 8 bit value,
; high 4 bits set background color and low 4 bits set foreground color.; hex bin color
;
; 0 0000 black
; 1 0001 blue
; 2 0010 green
; 3 0011 cyan
; 4 0100 red
; 5 0101 magenta
; 6 0110 brown
; 7 0111 light gray
; 8 1000 dark gray
; 9 1001 light blue
; a 1010 light green
; b 1011 light cyan
; c 1100 light red
; d 1101 light magenta
; e 1110 yellow
; f 1111 white
org 100h; set video mode
mov ax, 3 ; text mode 80x25, 16 colors, 8 pages (ah=0, al=3)
int 10h ; do it!; cancel blinking and enable all 16 colors:
mov ax, 1003h
mov bx, 0
int 10h
; set segment register:
mov ax, 0b800h
mov ds, ax; print "hello world"
; first byte is ascii code, second byte is color code.mov [02h], 'H'mov [04h], 'e'mov [06h], 'l'mov [08h], 'l'mov [0ah], 'o'mov [0ch], ','mov [0eh], 'W'
mov [10h], 'o'mov [12h], 'r'mov [14h], 'l'mov [16h], 'd'mov [18h], '!'
; color all characters:
mov cx, 12 ; number of characters.
mov di, 03h ; start from byte after 'h'c: mov [di], 11101100b ; light red(1100) on yellow(1110)
add di, 2 ; skip over next ascii code in vga memory.
loop c; wait for any key press:
mov ah, 0
int 16hret
热心网友
时间：2024-10-31 08:50
