gistfile1.txt

TITLE Reversing a String
INCLUDE Irvine32.inc

.data
buffer		BYTE	100	DUP(0)
byteCount	DWORD	?

.code
main PROC

; Read string from stdin
	mov	edx, OFFSET buffer
	mov	ecx, SIZEOF buffer
	call	ReadString
	mov	byteCount, eax

; Push the string into stack 
	mov	ecx, eax
	mov	esi, 0
Push:
	movzx	eax, buffer[esi]
	push	eax
	inc	esi
	loop	Push

; Pop the string from stack, in reverse	
	mov	ecx, byteCount
	mov	esi, 0
Pop:
	pop	eax
	mov	buffer[esi], al
	inc	esi
	loop	L2
	
; Print the string to stdout
	mov	edx, OFFSET buffer
	call	WriteString

	call	Crlf
	exit
main ENDP
END main