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