Add simple ftp tool

ftp.asm

@@ -0,0 +1,36 @@
+CPU 8086
+
+chunksize equ 0x20
+
+_start:
+    push bp
+    mov bp, sp
+    sub sp, 8
+    mov [bp-2], word chunksize ; recv size
+    mov [bp-4], word 0xf000 ; recv addr
+    mov [bp-6], word 0x0001 ; send size
+    mov [bp-8], word 0x7000 ; send addr
+    mov bx, [bp-8]
+    mov [bx], byte 0x42
+l0:
+    cmp word [bp-4], 0xf400
+    jb l1
+    add sp, 8
+    pop bp
+    ret
+l1:
+    push word [bp-2]
+    push word [bp-4]
+    mov ah, 0x05
+    int 0x80
+    add sp, 4
+    push word [bp-6]
+    push word [bp-8]
+    mov ah, 0x06
+    int 0x80
+    add sp, 4
+    add word [bp-4], chunksize
+    mov cx, 0x200
+l2: dec cx
+    jnz l2
+    jmp l0