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ภาษาแอสแซมบลี
ภาษาแอสเซมบลี
      เป็นภาษาที่ใช้ในการเขียนโปรแกรมภาษาหนึ่งซึ่งจะทางานโดยขึ้นกับรุ่นของ
ไมโครโพรเซซเซอร์ หรือ “หน่วยประมวลผล" (CPU)ของคอมพิวเตอร์
   การใช้ภาษาแอสเซมบลีจาเป็นต้องผ่านการแปลภาษาด้วยคอมไพลเลอร์
    เฉพาะเรียกว่า แอสแซมเบอร์ (assembler) ต้องจัดการให้อยู่ในรูปของ
    รหัสคาสั่งก่อน โดยที่ภาษาแอสเซมบลีใช้รหัสเป็นคาแทนคาสั่ง
    ภาษาเครื่อง ทาให้นักเขียนโปรแกรมสามารถเขียนโปรแกรมได้ง่ายขึ้น
ตัวอย่างโค้ดโปรแกรม
 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], '!'
   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 16h
    ◦   ret

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อุบลวรรณ ทัพซ้าย

  • 2. ภาษาแอสเซมบลี เป็นภาษาที่ใช้ในการเขียนโปรแกรมภาษาหนึ่งซึ่งจะทางานโดยขึ้นกับรุ่นของ ไมโครโพรเซซเซอร์ หรือ “หน่วยประมวลผล" (CPU)ของคอมพิวเตอร์
  • 3. การใช้ภาษาแอสเซมบลีจาเป็นต้องผ่านการแปลภาษาด้วยคอมไพลเลอร์ เฉพาะเรียกว่า แอสแซมเบอร์ (assembler) ต้องจัดการให้อยู่ในรูปของ รหัสคาสั่งก่อน โดยที่ภาษาแอสเซมบลีใช้รหัสเป็นคาแทนคาสั่ง ภาษาเครื่อง ทาให้นักเขียนโปรแกรมสามารถเขียนโปรแกรมได้ง่ายขึ้น
  • 4. ตัวอย่างโค้ดโปรแกรม  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], '!'
  • 5. 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 16h ◦ ret