FLDCW (http://siyobik.info/index.php?module=x86&id=102)
> -- Цитата:
> None; however, this operation might unmask a pending exception in the FPU status word. That exception is then generated upon execution of the next "waiting" floating-point instruction.Для проверки этого варианта, попробуйте рекомендацию из описания инструкции.> -- Цитата:
> To avoid raising exceptions when changing FPU operating modes, clear any pending exceptions (using the FCLEX or FNCLEX instruction) before loading the new control word.FCLEX/FNCLEX:http://siyobik.info/index.php?module=x86&id=85

## Код:
```
PROCEDURE [code] FCLEX 9BH 0DBH 0E2H;

...
      x: REAL;
   BEGIN
      FCLEX;
      x:= 1;
      ...
```
