What are the 12 interrupts in 8085?

Answer 1

An interrupt in the 8085, like in most computers, is a request to execute code out of sequence, usually by an external event, such as a signal from an IO device. In the 8085, an interrupt is almost exactly like a CALL instruction, except that the accumulator and flags register is also pushed on the stack. (Recall that the CALL instruction only pushes the return address on the stack.)This means that to return from an interrupt you must also pop the accumulator and flags, and this is done simply with the IRET instruction, as opposed to the RET instruction. In the 8085, the interrupt addresses are located in low memory, though the actual interrupt address could be anywhere if the interrupting device is capable of generating the three byte CALL sequence instead of the simpler INTx sequence, or the even simpler INTx.5 sequence.

Answer 2

The 8085 does not have 12 interrupts, it has five.

INTR

RST5.5

RST6.5

RST7.5

TRAP

If you are thinking about the interrupt vector table in low memory, which happens to have 12 entries, you are misclassifying things, as this table only applies to RST5.5, RST6.5, RST7.5, TRAP, and INTR vectors that use the RST instuction. In point of fact, the INTR vector can be anywhere in memory, because the hardware response vector can easily provide a CALL instruction instead of an RST instruction.

That said, the RST vector table in low memory is...

00H - RST 0

08H - RST 1

10H - RST 2

18H - RST 3

20H - RST 4

24H - TRAP

28H - RST 5

2CH - RST 5.5

30H - RST 6

34H - RST 6.5

38H - RST 7

3CH - RST 7.5

... where RST 0 through RST 7 are software interrupts or hardware vectors for INTR, and RST x.5 and TRAP are hardware interrupts.

Answer 3

For X86 systems there are many different IRQs (Interrupt requests) But i can list the main ones.

IRQ 0- System timer

IRQ 1-Keyboard controller

IRQ 2- transfers signals from 8-15

IRQ3-Serial port controller for COM2

IRQ4-Serial port controller

IRQ5-Sound card

IRQ6- Floppy disk controller

IRQ7-Parallel port

IRQ8- RTC Timer

IRQ9-SCSI peripherals.

IRQ10-SCSI or NIC

IRQ11-SCSI or NIC

IRQ12-PS/2 Mouse.

IRQ13-Co-Processor

IRQ14-ATA

IRQ15-Secondary ATA

Answer 4

There are 2 types interrupts in 8085 such as:

1)hardware interrupt

2)software interrupt

Answer 5

There are 2 types of interrupts they are:

1) mask-able interrupts

2)non-mask able interrupts

Answer 6

TRAP, RST7.5, RST6.5, RST5.5, and INTR.