Data commit

Task/Copy-stdin-to-stdout/8086-Assembly/copy-stdin-to-stdout.8086

@@ -0,0 +1,22 @@
+READ:	equ	3Fh		; MS-DOS syscalls
+WRITE:	equ	40h
+BUFSZ:	equ	4000h		; Buffer size
+	cpu	8086
+	bits	16
+	org	100h
+section	.text
+read:	mov	ah,READ		; Read into buffer
+	xor	bx,bx		; From STDIN (file 0)
+	mov	cx,BUFSZ
+	mov	dx,buffer
+	int	21h
+	test	ax,ax		; Did we read anything?
+	jz	done		; If not, stop
+	xchg	ax,cx		; Write as many bytes as read
+	mov	ah,WRITE
+	inc	bx		; To STDOUT (file 1)
+	int	21h
+	jmp	read		; Go get more
+done:	ret	
+section	.bss
+buffer:	resb	BUFSZ