TITLE Writing characters, strings, and integers  (output.asm)

; Testing Following Procedures in the assembly32.lib Library:

; Clrscr:       Clears the console screen
; Crlf:         Write CR and LF characters (end-of-line)
; WriteChar:    Write a single character to standard output
; WriteString:  Write a null-terminated string to standard output
; WriteHex:     Write 32-bit integer in eax in hexadecimal format
; WriteBin:     Write 32-bit integer in eax in binary format
; WriteDec:     Write 32-bit integer in eax in unsigned decimal format
; WriteInt:     Write 32-bit integer in eax in signed decimal format


.686
.MODEL flat, stdcall
.STACK

INCLUDE Irvine32.inc

.data

CR  EQU     0Dh         ; carriage return
LF  EQU     0Ah         ; line feed

string  BYTE "Hello World",CR,LF,0

.code
main PROC
; Clear the screen
    call Clrscr         ; Call procedure Clrscr

; Write a character to standard output
    mov  al, 'A'        ; al = 'A' (or 41h)
    call WriteChar      ; Write character in register al
    call Crlf           ; Write CR and LF chars (end-of-line)
    
; Write a null-terminated string to standard output
    lea  edx, string    ; load effective address of string into edx
    call WriteString    ; write string whose address is in edx

; Write an integer to standard output
    mov  eax,0F1A37CBFh ; eax = 0F1A37CBFh
    call WriteHex       ; Write eax in hexadecimal format
    call Crlf           ; Write CR and LF chars (end-of-line)

    call WriteBin       ; Write eax in binary format
    call Crlf           ; Write CR and LF chars (end-of-line)

    call WriteDec       ; Write eax in unsigned decimal format
    call Crlf           ; Write CR and LF chars (end-of-line)

    call WriteInt       ; Write eax in signed decimal format
    call Crlf           ; Write CR and LF chars (end-of-line)

    exit
main ENDP
END main