assembly-programs/12.EvenZeroFifty(Proc).asm at main · liulalemx/assembly-programs · GitHub

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TITLE EvenZeroFifty

;Program Desctiption: This program displays even numbers between Zero and Fifty
;Author: Liul Alemayehu

include 'emu8086.inc'

.MODEL SMALL                                 ; com program, Memory Descriptor (Tiny | Small | Medium | Large)
.STACK 100                                   ; stack

.DATA                                        ; Beginning of data segment where data is stored
    msg1 db 'Hi,Even numbers(0-50): ',0      ; Declare variable msg1 and assigned it a value
    newline db 13,10,'$'                     ; Creates newline

.CODE                                        ; Beginning of code segment
main PROC
    ; Start
    MOV Ax,@DATA                             ; Moving address of data (data segment) to Ax register
    MOV Ds,Ax                                ; Initializing of Data segment register (Ds) from Accumilator register (Ax)

    ; Prompt1
    LEA Si,msg1                              ; Loading the effective address of our msg to the Source index register (Si)
    CALL PRINT_STRING                        ; Calling the PRINT_STRING procedure

    ; Newline
    LEA Dx,newline
    MOV Ah,09
    INT 21h

    MOV Bx,00                                ; Store the value of Zero in the Bx register
    MOV Cx,50                                ; Store the value of Fifty in the Cx register

    L1:
    CMP Bx,Cx                                ; Compares the numbers
    JLE L2                                   ; Jumps to lable 'L2' if conditions met
    JMP Exit                                 ; Jumps to exit

    L2:
    JMP Print                                ; Jumps to 'Print' label

    ; Print Result
    Print:
    MOV Ax,Bx                                ; Moves current value to Ax
    CALL PRINT_NUM                           ; Prints number stored in Ax
    PRINT ' '                                ; Prints an empty space
    ADD Bx,02                                ; Increments the current value by 2
    JMP L1                                   ; Jumps back to 'L1' label

    Exit:
    MOV Ah,4Ch                               ; Exit
    INT 21h                                  ; Does it!

main ENDP

DEFINE_SCAN_NUM
DEFINE_PRINT_NUM_UNS
DEFINE_PRINT_NUM
DEFINE_PRINT_STRING

END main