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Last change
on this file since 2 was 2, checked in by Mattia Monga, 15 years ago |
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Importazione sorgenti
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File size:
844 bytes
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| 1 | ;Copyright (C) 2007 by Mattia Monga <mattia.monga@unimi.it>
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| 2 | bits 16 ; 16 bit real mode
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| 3 | org 0x7C00 ; origine indirizzo 0000:7C00
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| 4 |
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| 5 | start:
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| 6 | mov ax, 0xb800 ; text video memory dest array index [ES:DI]
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| 7 | mov es, ax
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| 8 | mov di, 0 ; start of video memory
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| 9 |
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| 10 | cld ; clears direction flag (index regs incremented)
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| 11 | mov ah, 0x0F ; attrib = white on black
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| 12 | mov si, msg
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| 13 | call message
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| 14 | hlt
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| 15 |
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| 16 | message:
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| 17 | lodsb ; carica un byte da [DS:SI] in AL e inc SI
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| 18 | cmp al, 0
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| 19 | jz done
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| 20 | stosw ; memorizza una word da [ES:DI] in AL e inc SI
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| 21 | jmp message
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| 22 | done: ret
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| 23 |
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| 24 |
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| 25 | msg db "Hello world from the bare machine!!!", 0
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| 26 |
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| 27 | times 510-($-$$) db 0
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| 28 | dw 0xAA55
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