“Interrupt 0” wasn’t its priority, but it’s index. IIRC, the 8086 doesn’t have the concept of interrupt priority. Upon encountering a #DE, the processor would l

“Interrupt 0” wasn’t its priority, but it’s index. IIRC, the 8086 doesn’t have the concept of interrupt priority. Upon encountering a #DE, the processor would look up interrupt 0 in the IVT (located at 0x00000 though 0x00003 in “real mode”).