Question

write assembly language code to print the following poem using _putStr: Ah, Necromancy Sweet! Ah, Wizard...

write assembly language code to print the following poem using _putStr:
Ah, Necromancy Sweet!
Ah, Wizard erudite!
Teach me the skill.
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Answer #1
  1. org 0x7c00
  2. cli ;disable hardware interrupts
  3. cld ;clear direction flag
  4. xor ax,ax ;zero out ax
  5. mov ds,ax ;initialise data segment
  6. mov ss,ax ;initialise stack segment
  7. mov sp, 0x7c00 ;point sp at memory available for stack
  8. mov si, msg ;ds:si -> message
  9. call putstr ;print message
  10. hang:
  11. jmp hang ;loop forever
  12. msg db 'Ah, Necromancy Sweet!', 0
  13. INT 21H                          ;print new line
  14. msg db 'Ah, Wizard erudite!', 0
  15. putstr:
  16. lodsb ;load next character
  17. or al,al ;end of string?
  18. jz finish ;exit loop if so
  19. mov bx, 7 ;page = 0, attribute = 7
  20. mov ah, 0xe ;print character function
  21. int 0x10 ;print character
  22. jmp putstr ;get next character
  23. finish:
  24. retn ;return to caller
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