Table of Contents
How are memory locations addressed?
To access the memory location either you must know the memory location by its unique name or it is required to provide a unique address to each memory location. The memory locations are addressed from 0 to 2K-1 i.e. a memory has 2K addressable locations. And thus the address space of the computer has 2K addresses.
How many memory location are identified by a processor with 8 bits address bus at a time?
The facile answer is “256” because 8 bits can only have 256 different values.
What is 8bit address?
8-bit CPUs use an 8-bit data bus and can therefore access 8 bits of data in a single machine instruction. The address bus is typically a double octet (16 bits) wide, due to practical and economical considerations. This implies a direct address space of 64 KB (65,536 bytes) on most 8-bit processors.
How many address locations can a 16-bit microprocessor with 8 bit data bus address?
There are 16 bits gling out to the memory so it can choose 64ki locations. Then, each location contains 8 bits. The word size here may or may not match the CPU computation unit size, and this may or may not match the logical granularity in addressing.
What are the characteristics of memory addresses?
Memory addresses are fixed-length sequences of digits conventionally displayed and manipulated as unsigned integers. Such numerical semantic bases itself upon features of CPU (such as the instruction pointer and incremental address registers ), as well upon use of the memory like an array endorsed by various programming languages .
How does a processor address a large amount of memory?
The processor can usually address a memory space that is much larger than the memory space covered by an individual memory chip. In order to splice a memory device into the address space of the processor, decoding is necessary. For example, the 8088 issues 20-bit addresses for a total of 1MB of memory address space.
What determines the efficiency of addressing of memory?
The efficiency of addressing of memory depends on the bit size of the bus used for addresses – the more bits used, the more addresses are available to the computer.
What is the number of bits in a chip?
• Memory Organization: Each memory chip contains 2N locations, where N is the no. of address pins on the chip. Each location contains M bits, where M is the no. of data pins on the chip. The entire chip will contain 2N x M bits. E.g. for 4K x 4, 212 =4096 locations, each location holding 4 bits, so N=12 & M=4. 5.