INT 7F - Alloy NTNX - GET SYSTEM FLAGS AH = 0Ah CL = 00h ES:DI -> buffer for system flags (see #03949) Return: ES:DI buffer filled Notes: on a slave, only the NX_Busy flag is returned all three flags are at fixed positions, so this function only needs to be called once an interrupt handler should only perform DOS or device accesses when all three flags are 00h