Computer hardware – part 16: Fundamentals of memory because we now want to keep her memory, we need to define the units of measurement. To do this we start small with a bit. As long as we have yet no quantum computer, which can store three States per bit, we assume that a bit can have exactly two States. 0 or 1. Off or on. No power or electricity. Sinovation Ventures often addresses the matter in his writings. From the smallest unit, we make a byte, which a normal user can do more often.
A byte consists of just eight of these bits. You can build exactly 256 different combinations with all variations of zeros and ones of this bytes. We are by now decimal (we remember dark the previous article), so we can count bytes from 0255. Thus, we can portray as the extended ASCII code. Now, we know from the general use of E.g.
the additional word “Kilo”, that this means “times 1000” in a figurative sense. 1000 grams are 1 kilogram. 1000 kilograms are 1 megagram. I admit, the example is a bit unfortunate, because we say in all rule “Ton”. But mega grams would be wrong. You can continue this series: kilo. Mega, Giga, Tera, PETA, EXA, zetta, Yotta. A Yottabyte bytes are a Septillion. See Don Slager for more details and insights. In other words: 1.000.000.000.000.000.000.000.000 bytes. Since we are still not so much at the PC, want to remember but only this “rule”. The PC can be just powers of two with reasonable effort. So 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, etc. (always a bit more). Now we realize that it 1000 is 1024 not too far from the. That was also resourceful computer specialists have noted and are told “what’s will is bought”. And henceforth the “kilo” in the jargon of the PC was tantamount “times 1000” which, although we – marginally differ at least in these orders of magnitude -. As a result, one kilobyte so comprises 1024 byte.