Small operating system made in assembly language
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.model tiny |
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.486 |
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smart |
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.code |
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org 0h |
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include ..\include\mem.h |
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start: |
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jmp tsr |
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offsets dd 0 |
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db 'KEYBOARD' |
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tsr: |
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pushf |
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db 2eh,0ffh,1eh |
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dw offsets |
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cli |
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cmp cs:isstate,1 |
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je endofforce |
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mov cs:isstate,1 |
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mov cs:eaxr,eax |
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in al,60h |
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cmp al,68 |
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je F10 |
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cmp al,87 |
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je F11 |
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cmp al,88 |
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je F12 |
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endof: |
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mov cs:isstate,0 |
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mov eax,cs:eaxr |
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endofforce: |
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sti |
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iret |
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isstate db 0 |
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infos db 40 dup (0) |
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feax dd 0 |
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F10: |
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push cs |
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pop ds |
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mov si,offset com |
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mov ah,5 |
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int 49h |
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pop ax |
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pop ax |
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pop ax |
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push gs |
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push gs |
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push gs |
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pop ds |
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pop es |
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pop fs |
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push gs |
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push size exe |
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sti |
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mov cs:[isstate],0 |
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retf |
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com db 'COMMANDE.CE',0 |
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F11: |
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push ax di es |
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push cs |
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pop es |
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mov di,offset infos |
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mov ah,34 |
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int 47h |
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mov al,cs:[di+7] |
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inc al |
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cmp al,9 |
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jbe notabove |
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mov al,0 |
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notabove: |
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mov ah,0 |
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int 47h |
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pop es di ax |
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jmp endof |
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f12: |
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pushad |
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pushf |
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push ds |
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mov cs:[eaxr],eax |
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mov cs:[ebxr],ebx |
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mov cs:[ecxr],ecx |
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mov cs:[edxr],edx |
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mov cs:[esir],esi |
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mov cs:[edir],edi |
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mov cs:[espr],esp |
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mov cs:[ebpr],ebp |
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mov cs:[csr],cs |
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mov cs:[dsr],ds |
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mov cs:[esr],es |
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mov cs:[fsr],fs |
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mov cs:[gsr],gs |
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mov cs:[ssr],ss |
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push cs |
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pop ds |
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mov si,offset sep |
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call Showstr |
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mov si,offset reg |
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mov di,offset regdata |
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mov bx,7 |
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showregs: |
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cmp byte ptr cs:[si+6],":" |
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jne endshowregs |
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call Showstr |
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cmp byte ptr cs:[si+4]," " |
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je segsss |
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mov edx,cs:[di] |
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mov cx,32 |
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call Showhex |
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add di,4 |
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jmp showmax |
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segsss: |
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mov dx,cs:[di] |
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mov cx,16 |
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call Showhex |
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add di,2 |
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showmax: |
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add si,9 |
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mov bp,dx |
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push si |
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mov si,offset beginds |
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call showstr |
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mov si,bp |
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mov cx,8 |
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mov al,0 |
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letshow: |
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mov dl,ds:[si] |
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inc si |
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call showhex |
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inc al |
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cmp al,10 |
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jb letshow |
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mov si,offset ende |
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call showstr |
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mov si,offset begines |
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call showstr |
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mov si,bp |
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mov cx,8 |
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mov al,0 |
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letshow2: |
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mov dl,es:[si] |
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inc si |
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call showhex |
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inc al |
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cmp al,10 |
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jb letshow2 |
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mov si,offset ende |
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call showstr |
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pop si |
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jmp showregs |
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endshowregs: |
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mov si,offset sep |
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call Showstr |
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xor ax,ax |
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int 16h |
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pop ds |
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popf |
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popad |
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jmp endof |
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begines db ' es[',0 |
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beginds db ' ds[',0 |
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ende db '] ',0 |
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;==============================Affiche le nombre nb hexa en EDX de taille CX et couleur BL============== |
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ShowHex: |
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push ax bx cx edx si di |
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mov di,cx |
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sub cx,32 |
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neg cx |
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shl edx,cl |
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shr di,2 |
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mov ah,09h |
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and bx,1111b |
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Hexaize: |
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rol edx,4 |
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mov si,dx |
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and si,1111b |
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mov al,[si+offset tab] |
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push cx |
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mov cx,1 |
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cmp al,32 |
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jb control2 |
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mov ah,09h |
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int 10h |
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control2: |
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mov ah,0Eh |
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int 10h |
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pop cx |
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dec di |
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jnz Hexaize |
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pop di si edx cx bx ax |
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ret |
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Tab db '0123456789ABCDEF' |
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;==============================Affiche une chaine DS:SI de couleur BL============== |
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showstr: |
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push ax bx cx si |
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mov cx,1 |
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again: |
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lodsb |
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or al,al |
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jz fin |
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and bx,0111b |
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cmp al,32 |
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jb control |
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mov ah,09h |
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int 10h |
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control: |
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mov ah,0Eh |
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int 10h |
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jmp again |
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fin: |
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pop si cx bx ax |
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ret |
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;================================================ |
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;Routine de d<EFBFBD>bogage |
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;================================================ |
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regdata: |
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eaxr dd 0 |
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ebxr dd 0 |
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ecxr dd 0 |
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edxr dd 0 |
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esir dd 0 |
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edir dd 0 |
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espr dd 0 |
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ebpr dd 0 |
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csr dw 0 |
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dsr dw 0 |
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esr dw 0 |
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fsr dw 0 |
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gsr dw 0 |
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ssr dw 0 |
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reg db 0Dh,0Ah,"eax : ",0 |
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db 0Dh,0Ah,"ebx : ",0 |
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db 0Dh,0Ah,"ecx : ",0 |
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db 0Dh,0Ah,"edx : ",0 |
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db 0Dh,0Ah,"esi : ",0 |
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db 0Dh,0Ah,"edi : ",0 |
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db 0Dh,0Ah,"esp : ",0 |
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db 0Dh,0Ah,"ebp : ",0 |
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db 0Dh,0Ah,"cs : ",0 |
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db 0Dh,0Ah,"ds : ",0 |
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db 0Dh,0Ah,"es : ",0 |
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db 0Dh,0Ah,"fs : ",0 |
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db 0Dh,0Ah,"gs : ",0 |
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db 0Dh,0Ah,"ss : ",0 |
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sep db 0Ah,0Dh,'********************',0Ah,0Dh,0 |
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end start
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