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Memory Address Decoding
Binary Decoders - Decoders have 2n-inputs and n outputs, each input combination results in a single output line contain a 1, and all other lines contain a 0 on the output. Examples of use are decoding memory addresses and CPU instructions.Typically Decoders have an enable when 1 enables decoding the input to 1 on a single output, when not enabled all outputs are zero. The switching function for an enabled 2-input binary decoder is:
The 2 to 4 decoder representation is:
Memory Address Decoding - Figure indicate a 16K by 1 bit word memory (8 bit words are implemented by selecting 8 bits as a group, for instance). Since 214 is about 16K, a single decoder would require 14 inputs and 214 output
The memory decoder is linked to the CPU by the address bus. Each memory cell is linked to an output and input data bus, a write/read control, and the decoder which enables the memory cell when the suitable address appears. The decoder ensures that just a single memory cell is activated at a time for either output or input.
DMA controller : Steps include in transferring a block of data from I/O devices (for example a disk) to memory: 1. CPU sends a signal to initiate disk transfe
Software Interrupts Software interrupts are the result of an INT instruction in an executed program. It may be assumed as a programmer triggered event that immediately stops e
write an assembly language program that has two subroutines : one for encrypting alphabates of a string and second fo decrypting the encoded string . in encryption simply converta
1. Write a program that will generate an array of ten random 32-bit integers, and that will display on the monitor the numbers followed by either the words " has the fourth bit se
wap proram for bthe addition of two 3*3 matrix
Write a program to evaluate the following expression. You are to evaluate the following equation: num1 - (input + num2) - (num3 + num4) Input will be a hex number input by
Interrupt Table Each interrupt level has a booked memory location, called an interrupt vector. All these vectors (or pointers) are stored in the interrupt table. Table lies at
This is a short program to practice assembly language loops and if/else statements. You will use various jump commands and the cmp instruction. The program will generate a random
i have trying to do the homework but there is a mistake. (Counting positive and negative numbers and computing the average of numbers) write a program that reads an unspecified nu
Overview of Intel Pro-Pentium : The 2 chief players in the PC CPU market are Motorola and Intel. Intel has enjoyed incredible success with its processors since the early 1980
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