parallel port interrupt identification

Hi all,

is there any way to know if there is an interrupt active for a parallel port ?
When the port is configured from Bios in PS2 mode status register bit #2 holds this information (it is cleared on interrupt), but when the port is configured from Bios in Ecp mode bit #2 in status register is always set regardless the interrupt state.
Also Ecp RegisterB seems not to have a valid information about interrupt status (always set) or better I am not able to read it in the right way.

Any help will be very appreciated,
Paolo