bits 32
org 0x100000

main:
  push .msg
  call puts
  add esp, 4
.loop:
  ; loop forever
  jmp .loop
.msg: db "Hello World from Userspace!", 0

puts:
  push ebp
  mov ebp, esp
  push esi
  push edi
  mov esi, [ebp+8]
  mov edi, 0xB8000
.loop:
  lodsb
  cmp al, 0
  je .end
  mov [edi], al
  mov byte [edi+1], 0x07
  add edi, 2
  jmp .loop
.end:
  pop edi
  pop esi
  pop ebp
  ret