Probleme ACSO 2013

S se defineasc la ce este utilizat codul de mai jos, i s fie descris fiecare funcie din exemplu.Varianta 1 DOSmoval,'.'

int29h movah,86h

xorcx,cx

movdx,50000

int15h

movah,1

int16h jzRepeat xorah,ahint16h cmpax,011Bh

jneRepeat S se defineasc la ce este utilizat codul de mai jos,

i s fie descris fiecare funcie din exemplu.

Varianta 2 DOSSTART:AH = 3Ch X = DS:DX = END: CF = 0 - , AX = CF = 1 - , AX = A file must be created before it can be used. To create a new file, or to rewrite an

existing file, the user provides a filename and an attribute. DOS returns a file handle.

INT 21h, Function 3Ch DOS function: Open a new file/rewrite a file

Input:

AH = 3Ch

DS:DX = address of filename (an ASCIIZ string ending with a zero byte)

CL = attribute

Output: If successful, AX = file handle

Error: if CF = 1, AX = error code (3, 4, or 5)

http://fleder44.net/312/notes/16Files/Index.html

S se defineasc la ce este utilizat codul de mai jos,


Varianta 3 DOSSTART:AH = 3Dh AL = (0 , 1 - , 2 - ) DS:DX = END: CF = 0 , AX = CF = 1 - , AX = , :

AH 3dHAL (0 = , 1 = , 2 = , ..)DS:DX ASCII AX CF CY

, S se defineasc la ce este utilizat codul de mai jos,


Varianta 4 DOSSTART: AH = 3Eh BX = END: CF = 0 CF = 1 - , AX = (06h )

, . 3dh AX. .

AH 3eHBX

AX CF CYS se defineasc la ce este utilizat codul de mai jos,


Varianta 5 DOSSTART:AH = 3Fh BX = CX = DS:DX = END: CF = 0 , AX = CF = 1 - , AX =



Varianta 6 DOSSTART:AH = 40h BX = CX = DS:DX = END: CF = 0 , AX = CF = 1 - , AX =



Varianta 7 DOSSTART: AH = 42h AL = 0 1 2 BX = CX:DX = END: CF = 0 DX:AX = CF = 1 - , AX = S se defineasc la ce este utilizat codul de mai jos,


Varianta 8 DOSSTART: AX = 4406h BX = END: CF = 0 -

AL = 0

AL = 0FFh CF = 1 - , AX = S se defineasc la ce este utilizat codul de mai jos,


Varianta 9 pushf push bp movbp,sp

push ax

movax,[bp+8] mov[bp+2],ax

popax bp

pusha ; flags

; cf

pushf

pop ax

xor ax,01h

push ax

popfhttp://www.kolasc.net.ru/cdo/programmes/assembler/pushf.htmlhttp://www.kolasc.net.ru/cdo/programmes/assembler/pusha.html


i s fie descris fiecare funcie din exemplu. Varianta 10

Func1 proc near

push ax

in al,61h

and al,not 3

out 61h,al

pop ax

ret

Func1 endp

in al,60h ; -

push ax ;

in al,61h ; 61h

or al,80h ; 61h 1

out 61h,al ; -

pop ax

out 61h,al ; 61h; ; : X= http://forum.codenet.ru/q44474?nowrap=1&s=#http://www.kolasc.net.ru/cdo/programmes/assembler/in.htmlhttp://www.kolasc.net.ru/cdo/programmes/assembler/not.htmlhttps://courses.engr.illinois.edu/ece390/books/labmanual/io-devices-speaker.html



Varianta 11 DOSbegin: mov AX,text mov DS,AX

mov AH,09h mov DX,offset message int 21h

mov AH,4Ch

mov AL,00h int 21h

message db 'Assembler4Ever$' text ends end begin begin: mov AX,text ; (3) mov DS,AX ; (4) AX, DS

mov AH,09h ; (5) DOS 09h

mov DX,offset message ; (6)

int 21h ; (7) DOS

mov AH,4Ch ; (8) 4Ch

mov AL,00h ; (9) 0

int 21h ; (10) DOS

message db ' $' ; (11)

text ends ; (12)

end begin ; (13)

http://netlib.narod.ru/library/book0027/ch01_00.htmS se defineasc la ce este utilizat codul de mai jos,


Varianta 12 jmp bx

mov bp,7c03h + len1

mov ah,13h

mov al,01h

mov bh,0h

mov bl,01h

mov cx,len2

mov dh,02h

mov dl,12h

int 10h

mov ah,00h

int 16hhttp://devel.archefire.org/mirrors/my.execpc.com/~geezer/osd/cons/bios13.asm

; write string

mov ah,13h

mov al,1 ; write mode (advance cursor, ASCII string)

mov bh,0 ; video page

mov bl,02 ; attribute (green on black)

mov cx,5 ; string length

mov dh,2 ; starting row

mov dl,2 ; starting col

push cs

pop es

mov bp,string1

int 10h

http://www.programmersforum.ru/showthread.php?t=125335 00h , . , , - . - ASCII- .

: : AH = 00h

: AL = ASCII- 0, AH ASCII- ;

AH = - ASCII-, AL=0;



Varianta 13 mov cx, 100+weight

mov dx, 20

mov al, 15

u1: mov ah, 0ch

mov al,03h

mov bh,0

int 10h

dec cx

cmp cx, 100

jae u1

; draw upper line:

mov cx, 100+w ; column

mov dx, 20 ; row

mov al, 15 ; white

u1: mov ah, 0ch ; put pixel

int 10h

dec cx

cmp cx, 100

jae u1

https://github.com/AhmadAbdelNaser/emu8086/blob/master/examples/0_sample_vga_graphics.asm

Varianta 14 mov ax, 40h

mov ds, ax

mov ah, 06h

mov al, 0

mov bh, 01011111b

mov ch, 1

mov cl, 30

mov di, 84h

mov dh, [di]

mov di, 4ah

mov dl, [di]

dec dl

int 10h

CLEAR_SCREEN PROC NEAR

; clear the screen by scrolling entire screen window,

; and set cursor position on top.

; default attribute is set to white on blue.

clear_screen proc near

push ax ; store registers...

push ds ;

push bx ;

push cx ;

push di ;

mov ax, 40h

mov ds, ax ; for getting screen parameters.

mov ah, 06h ; scroll up function id.

mov al, 0 ; scroll all lines!

mov bh, 1001_1111b ; attribute for new lines.

mov ch, 0 ; upper row.

mov cl, 0 ; upper col.

mov di, 84h ; rows on screen -1,

mov dh, [di] ; lower row (byte).

mov di, 4ah ; columns on screen,

mov dl, [di]

dec dl ; lower col.

int 10h

; set cursor position to top

; of the screen:

mov bh, 0 ; current page.

mov dl, 0 ; col.

mov dh, 0 ; row.

mov ah, 02

int 10h

pop di ; re-store registers...

pop cx ;

pop bx ;

pop ds ;

pop ax ;

ret

clear_screen endp

http://read.pudn.com/downloads166/sourcecode/os/759925/micro-os_kernel.asm__.htmS se defineasc la ce este utilizat codul de mai jos,


Varianta 15

push cx

mov bp,0c01bh

mov ah,13h

mov al,01h

mov cx,mes1_len

mov bh,05h

mov bl,02h

mov dh,06h

mov dl,0

int 10h

pop cx

jmp endLineWrite string (EGA+, meaningPC ATminimum)AH=13hAL = Write mode, BH = Page Number, BL =Color, CX = String length, DH = Row, DL = Column, ES:BP = Offset of string



Varianta 16 mov ah,02h

mov al,1

mov ch,0

mov cl,2

mov dh,0

mov dl,0

mov bx,7f00h

int 13h

mov ah,00h

DISK - READ SECTOR(S) INTO MEMORYAH = 02h

AL = number of sectors to read (must be nonzero)

CH = low eight bits of cylinder number

CL = sector number 1-63 (bits 0-5)

high two bits of cylinder (bits 6-7, hard disk only)

DH = head number

DL = drive number (bit 7 set for hard disk)

ES:BX -> data buffer

Return:CF set on error

if AH = 11h (corrected ECC error), AL = burst length

CF clear if successful

AH = status (see #00234)AL = number of sectors transferred (only valid if CF set for some

BIOSes)



Varianta 17

push bpmov bp,spcld mov ax,ds

mov es,ax

mov di,es

mov al,0

mov cx,0ffffh repne scasb dec di

dec di

mov ax,dx

pop bp

ret

registru al este egal cu null. Scasb verifica byte cu byte caracterele incarcate in di, si le compara cu valoarea din registru al. Conform ascii 0 = null , deci aici se face o iteratie cu repne pentru a gasi sfirsitul stringului, si rezultatul pastrat in dx se introduce in ax.S se defineasc la ce este utilizat codul de mai jos,


Varianta 18 DOSmov ah,1

int 21h mov [StarageBuffer+di],al

cmp al,END_OF_DATA

je DataAckquired

inc di cmp di,STORAGE_BUFFER_SIZE jb StorageLoop 6 http://do.znate.ru/docs/index-14186.html?page=8

6.1 EQU

EQU. :mov ah,1

int 21h;

mov [StarageBuffer+di],al;

cmp al,end_of_data; " "?

je DataAckquired; ,

inc di;

cmp di,storage_buffer_size; ?

jb StorageLoop; ,

; ...

;



Varianta 19 Temp EQU [bp-2]

I EQU [bp+4]

J EQU [bp+6]

K EQU [bp+8]

;

_Add PROC push bp mov bp,sp sub sp,2 mov ax,I

add ax,J

mov ax,K

mov Temp,ax

mov sp,bp pop bp

ret

_Add ENDP

push bp ; save old value of bp

mov bp, sp ; make bp our reference point

sub sp, 2 ; creates a local variable,it can be accessed by [bp-2]http://books.google.ru/books?id=WLgCBAAAQBAJ&pg=PA650&lpg=PA650&dq=push+bp++++++++++++++++++++++++mov++bp,sp+++++++++++++++++++++sub++sp,2++++++++++++++++++++++mov++ax,I++++++++++++++++++++++add++ax,J&source=bl&ots=dz5UImNI58&sig=L2moTB75y-qr-ywZ0b0WUCMxBC8&hl=ru&sa=X&ei=zNhPVLewIoOhyAPO34FY&ved=0CCUQ6AEwAQ#v=onepage&q=push%20bp%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20mov%20%20bp%2Csp%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20sub%20%20sp%2C2%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20mov%20%20ax%2CI%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20add%20%20ax%2CJ&f=false

Varianta 40 KeyLoop:

mov ah,1 int 21h

mov [bx],al inc bx cmp al,0dh loopne KeyLoop http://www.codenet.ru/progr/asm/tasm/39.php , ,

, ENTER

128 .

( LOOPNE):

KeyLoop:

mov ah,1 ; DOS

;

int 21h ;

;

mov [bx],al ;

inc bx ;

;

cmp al,0dh ; ENTER?

loopne KeyLoop ; ,

; ,

; -

;

Probleme ACSO 2013

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