Define the function of the following 8086 IC pins

Define the function of the following 8086 IC pins, 

a. BHE 

b. NMI 

c. INTA

Solution

BHE:

Bus High Enable is the abbreviation for Bus High Enable. It's located at pin 34 and is used to signify data flow through data bus D8-D15. During the first clock cycle, this signal is low; after that, it is active. It's located on pin 32 and is utilised to read signals for the read function.

NMI: 

NMI is a non-maskable interrupt, while INTR is a lower-priority maskable interrupt. INTA, which stands for interrupt acknowledge, is another interrupt pin. It is a type 2 interrupt with a single non-maskable interrupt pin (NMI) that has a higher priority than the maskable Interrupt request pin (INTR).

INTA:

One more interrupt pin associated is INTA called Interrupt acknowledge. It is a single non-maskable interrupt pin (NMI) having higher priority than the maskable interrupt request pin (INTR)and it is of type 2 Interrupt. Completes the current instruction that is in progress 

.