02_ Assembly Language (sub-program 01_ basic input and output function template)

Program Requirements:

The data contains a variable that writes an input method to enter a number NUM (0<=num<=65535) from the command line and outputs the number using the output method.

Objective:

Input function template

Output function template

Code implementation:

1 ;Example: Data contains a variable, write an input method to enter a number from the command line, output this number2Stack SEGMENT Stack'STACK'3STAK DW theDUP (?)4 STACK ENDS5 6 DATA SEGMENT7 NUM DW?8 DATA ENDS9 Ten CODE SEGMENT OneAssumeCS:CODE,DS:DATA,SS:STACK A MAIN PROC - START:  MOVAx,data -         MOVDs,ax the         XORAx,ax;Ax Reset 0 -         PagerINPUT -         PagerOUTPUT -         MOVah,4ch +         INT21H - MAIN ENDP +  AINPUT PROC;Inlet parameter: No Exit parameter: BX (therefore cannot exceed 65535) at         PUSHAX -         PUSHCX -         PUSHDX -         PUSHSI;Save Multiplier -         XORBX,BX -         XORcx,cx in         XORDX,DX -         MOVSI,Ten to NEXT:   MOVAH, on +         INT21H;receive the number of the keyboard -         CMPAl,0dh;determine if it is a carriage return the         JZDone;JZ: equals then jumps *         CMPAL,'0' $         JBERROR1;JB: Less then jumpPanax Notoginseng         CMPAL,'9' -         JAERROR1;JA: Greater than the jump the         SUBal,30h;converts ASCII characters into corresponding numbers +         MOVCl,al A         MOVAX,BX the         MULSI +         ADDax,cx -         MOVBx,ax $         JMPNEXT;continue to receive next data $ ERROR1: MOVBX,0FFFFH -         JMPEXIT - Done :   MOVdl,0ah the         MOVAH, Geneva -         INT21H;Output EnterWuyi         MOVDL,0DH the         MOVAH, Geneva -         INT21H Wu EXIT:   POPSI -         POPDX About         POPCX $         POPAX -         RET        ;subroutine returns - INPUT ENDP -  AOUTPUT PROC near;Inlet parameter: BX exit parameter: None +         PUSHAx;Protection Registers the         PUSHBX -         PUSHCX $         PUSHDX the         PUSHSI the         MOVSI,Ten    ;The si is the divisor the         XORcx,cx the         MOVAx,bx;inlet parameters in BX - NEXT1:  MOVDx0    ;DX Storage Remainder, clear 0 in         DIVSI;Ax and DX consist of 32 bits divided by 16 bits of SI, the quotient is saved in Microsoft Dynamics AX, the remainder is saved in DX the         PUSHDX the         INCCX;CX++,CX How many bits are recorded? About         CMPAx0 the         jnzNEXT1;JNZ does not equal the jump the OUTP:   POPDx;remainder out of stack the         ADDdl,30h +         MOVAH,2 -         INT21H the LOOP OUTPBayi         POPSI;Recovery Register the         POPDX the         POPCX -         POPBX -         POPAX the         RET        ;subroutine returns the OUTPUT ENDP the CODE ENDS theEND START

02_ Assembly Language (sub-program 01_ basic input and output function template)