Symbol: IIR_PENDING
src/add-ons/kernel/drivers/ports/pc_serial/SerialDevice.cpp
393
bool pending = (fCachedIIR & IIR_PENDING) == 0;
src/add-ons/kernel/drivers/ports/pc_serial/SerialDevice.cpp
421
while ((iir & IIR_PENDING) == 0) { // 0 means yes