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Computer Memory
The computer memory is a physical device used to store data or programs for use in a computer. Some types of computer memory include RAM (random access memory), ROM (read-only memory), and page cache.
4,434 Questions
It used to be lots of space some decades back. But today 844kb just means:
- 20-30 documents.
- 3-4 images.
- even an HD photo takes 2-5 mb.
- very low quality 20 minutes video.
- boring 2-d games that your dad used to play in his childhood!
- 1 complete webpage.
How are the characteristic a ROM chip different from those of a RAM chip?
A RAM Chip (Random access memory) loses it's stored information when power is lost. A RAM chip can have data written to it.
A ROM Chip (Read Only memory) does not lose it's information when power is lost, but it cannot be written to*
* There are different types of ROM...
ROM (Read Only memory) gets "burned" and cannot be changed.
PROM (Programmable Read Only Memory) (not sure if they're used much any more) can be erased by exposing to ultra-violet light and re-programmed.
EPROM (Electrically Programmable Read Only Memory) - can be re-written electrically with special software.
Who discover the photographic memory?
Photographic memory, or eidetic memory, is not attributed to a single discoverer but is a term used to describe the ability to recall images, sounds, or objects with high precision. The concept has been studied by various psychologists and researchers over the years, including Sir Francis Galton in the 19th century, who examined the phenomenon. However, it remains a debated topic in psychology, as true photographic memory is extremely rare and not fully understood.
What is semiconducter memories?
Definition: A device for storing digital information that is fabricated by using integrated circuit technology. Also known as integrated-circuit memory; large-scale integrated memory; memory chip; semiconductor storage; transistor memory.
Semiconductor memory is an electronic data storage device, often used as computer memory, implemented on a semiconductor-based integrated circuit. Examples of semiconductor memory include non-volatile memory such as Read-only memory (ROM), magnetoresistive random access memory (MRAM), and flash memory. It also includes volatile memory such as static random access memory (SRAM), which relies on several transistors forming a digital flip-flop to store one bit, and dynamic random access memory (DRAM), which uses one capacitor and one transistor to store each bits. Shift registers, processor registers, data buffers and other small digital registers that have no memory address decoding mechanism are not considered as memory.
Data is accessed by means of a binary memory address to the memory. If the memory address consists of M bits, the address area consists of two raised by M addresses per chip. Semiconductor memory are manufactured with a certain word length (number of 1-bit cells sharing the same memory address) that power of two, typically M=1, 2, 4 or 8 bit per chip. Consequently, the amount of data stored in each chip is MN2 bits. Possible figures are 1, 2, 4, 8, 16, 32, 64, 128, 256 and 512 bit, kbit, Mbit, Gbit and Tbit, here defined by binary prefixes. By combining several integrated circuits, memory can be arranged for a larger word length and/or address space than what is offered by each chip, often but not necesserily a power of two.
When you open a file it is copied into RAM so that you can view and work on it?
Sort of - certainly to work on it, it or bits of it must be in RAM.
How do you use opcode and operand?
The hard way: Download the processor manuals and code the opcode and operands by hand
The easy way: Use an assembler program. The instructions are slightly different for each program, so try reading the manuals.
There are lots, too many to name. Some of the popular ones are: EDO (Obsolete) SDRAM (Mostly Obsolete) RAMBUS (Obsolete) - Data transfers fast, but takes a long time to find. Only used on P4 systems. DDR/DDR2/DDR3 - Current technology. Basically a pumped up version of SDRAM GDDR2 - An early version of DDR2, only used on graphics cards.
Are two 128 ram better than one 256 ram?
Two RAMs of 128 is no better than having straight 256 RAM, because even though you are dividing the RAM up it still equals up to 256 RAM. This means that having two 128 RAMs will work just the same as using one 256 RAM.
cache memory
bit- byte- kilo- mega- giga- tera- peta- exa- zetta- yotta-
RAM on a 3250 can be upgraded to one gig. It's a single slot, however, which means you'll have to buy a one-gig chip, rather than adding to what you already have:
1 gb PC2700 - DDR - 333MHz - SODIMM - Un-Buffered - Non-Parity
DDR graphics card with DDR2 memory will it work?
In theory it should work; as graphics card memory is independent of the systme memory however you'll find people on google claiming it doesnt and that problems arise, however this could have resorted from a different problem
