import atk16

TEXT_MODE: atk16.ConstInt          = 1
GRAPHICS_MODE_ADDR: atk16.ConstInt = 0x17

atk16.store(GRAPHICS_MODE_ADDR, TEXT_MODE)
atk16.store(0xF800, 'H')
atk16.store(0xF801, 'E')
atk16.store(0xF802, 'L')
atk16.store(0xF803, 'L')
atk16.store(0xF804, 'O')

a = atk16.call_inline(
  atk16.load(0xF000)
)

atk16.asm("ldi 1 RA")