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How many interrupt lines does 8086 have?
8086 have 5 interrupt lines.
Is rst7.5 is a maskable interrupt in 8086?
No. RST7.5 is a maskable interrupt on the 8085, not the 8086/8088.
How the interrupt can be masked or unmasked in 8086?
The 8086 interrupt priorities are concerned ,software interrupt have the highest priority,followed by NMI ,followed by INTR.The lowest priority signals are unmaskable interrupts.
Explain how int 21h can be used for input output in 8086 microprocessor?
The INT 21H instruction in the 8086 is a software interrupt to vector 21H. In order for it to be used for input/output, the programming that responds to INT 21H must be present. This is part of the Operating System.
What do you mean by IVT in 8086?
Interrupt vector table
What is Bios function call in 8086 microprocessor?
The BIOS function in the 8086 microprocessor is called an interrupt function. It is an interrupt function because it is not called by a function call instruction.
What is the size of the interrupt vector table in the 8086-8088 microprocessor?
There are 256 different interrupt vectors in the 8086/8088. Each vector is a far CS:IP address, which is four bytes. That makes the interrupt vector table 1,024 bytes.
What is physical starting address and ending address of interrupt vector table of 8086?
The 8086 interrupt table is from 0000h to 03FFh for interrupt 0 through interrupt 255. It is common practice to design systems that use only the lower-numbered interrupts and then use the upper part of the interrupt table for code or data. For more information see: http://datasheets.chipdb.org/Intel/x86/808x/datashts/8086/231455-005.pdf
What is INTA in 8086 in miscropress?
Interrupt Acknowledgegenerated by the microprocessor in response to INTR. Causes the interrupt vector to be put onto the data bus
Where is interrupt handler and interrupt vector?
In the 8086/8088, the interrupt vector table is the first 1024 bytes of memory. In the 8085, the interrupt vector table is the first 64 bytes of memory if using the RST form of interrupt, otherwise the interrupt vector is provided by the interrupting device, usually in the form of a CALL instruction. The interrupt handler is wherever the interrupt vector points to.
What is type 2 interrupt?
Type-2 interrupt is called NMI (Non-maskable interrupt).May occur when 8086 receives a low to high transition on it's interrupt response.Could be used for handling critical situations like power failure detection.
What is parity interrupt?
There is no parity interrupt on the 8085 or 8086/8088. If you mean a memory parity interrupt, that is a function of system design, not a function of the particular microprocessor involved. Generally, a memory parity error is fatal, so one would typically place it on a non-maskable interrupt, such as TRAP on the 8085, or INT 2 (NMI) on the 8086/8088. This assumes, of course, that the memory parity error does not just crash the processor.
