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External Hardware-Interrupts
External hardware-interrupts are generated by controllers of external devices or coprocessors and are connected to the processor pin for Non Mask able Interrupts (NMI) or to the pin for Mask able Interrupts (INTR). The NMI line is generally booked for interrupts that occur because of fatal errors like a power distortion or parity error.
Interrupts from external devices may also be associated to the processor via the Intel 8259A Programmable Interrupt Controller (PIC). The CPU utilizes a group of I/O ports to control the PIC and the PIC puts its signals on the INTR pin. The PIC makes possible to enable or disable interrupts and to change the priority levels under supervision of a program.
The instructions CLI and STI may be utilized to enable/disable interrupts on the INTR pin, it has not any effect on NMI interrupts.
ALP to preform of two 16-bit numbers in register addressing mode
Description: LC3 allows input from keyboard and output to display on the screen. This lab will exercise the input/output capability using LC-3 Assembly language. Procedure
this is my first project i dont know where to start
64-bit integer calculator, which processes using 16-bits at a time (reg/mem16 operands)
how to write the alp for matrix addition in microprocessor 8086?
DAS: Decimal Adjust after Subtraction:- This instruction converts the result of subtraction operation of 2 packed BCD numbers to a valid BCD number. The subtraction operation has
Register Organization of 8086 8086 has a great set of registers containing special purpose and general purpose registers. All the 8086 resisters are 16-bit registers.
NOT : Logical Invert: The NOT instruction complements (inverts) the contents of an a memory location or operand register bit by bit. The instance are as following: Example :
I need help with assembly programing
Flag Register : 8086 has a 16-bit flag register which is divided into 2 parts, viz. (a)machine control flagsand (b)condition code or status flags. The condition code flag regi
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