english dictionary definition meaningYesDictionary.com



a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   







Lookup English Definition:

moby    : [m'obi]
/moh'bee/ (From {MIT}, seems to have been in use
among model railroad fans years ago. Derived from Melville's
"Moby Dick", some say from "Moby Pickle") 1. Large, immense,
complex, impressive. "A Saturn V rocket is a truly moby
frob." "Some MIT undergrads pulled off a moby hack at the
Harvard-Yale game."

2. (Obsolete) The maximum {address space} of a computer (see
below). For a 680[234]0 or {VAX} or most modern 32-bit
architectures, it is 4,294,967,296 8-bit bytes (four
{gigabytes}).

3. A title of address (never of third-person reference),
usually used to show admiration, respect, and/or friendliness
to a competent hacker. "Greetings, moby Dave. How's that
address-book thing for the Mac going?"

4. In backgammon, doubles on the dice, as in "moby sixes",
"moby ones", etc. Compare this with {bignum}: double sixes
are both bignums and moby sixes, but moby ones are not bignums
(the use of "moby" to describe double ones is sarcastic).

5. The largest available unit of something which is available
in discrete increments. Thus a "moby Coke" is not just large,
it's the largest size on sale.

This term entered hackerdom with the Fabritek 256K memory
added to the MIT AI PDP-6 machine, which was considered
unimaginably huge when it was installed in the 1960s (at a
time when a more typical memory size for a {time-sharing}
system was 72 kilobytes). Thus, a moby is classically 256K
36-bit words, the size of a PDP-6 or PDP-10 moby. Back when
{address registers} were narrow the term was more generally
useful, because when a computer had {virtual memory} mapping,
it might actually have more physical memory attached to it
than any one program could access directly. One could then
say "This computer has six mobies" meaning that the ratio of
physical memory to address space is six, without having to say
specifically how much memory there actually is. That in turn
implied that the computer could timeshare six "full-sized"
programs without having to swap programs between memory and
disk.

Nowadays the low cost of processor logic means that address
spaces are usually larger than the most physical memory you
can cram onto a machine, so most systems have much *less* than
one theoretical "native" moby of {core}. Also, more modern
memory-management techniques (especially paging) make the
"moby count" less significant. However, there is one series
of widely-used chips for which the term could stand to be
revived --- the Intel 8088 and 80286 with their incredibly
{brain-damaged} segmented-memory designs. On these, a "moby"
would be the 1-megabyte address span of a segment/offset pair
(by coincidence, a PDP-10 moby was exactly one megabyte of
nine-bit bytes).

[{Jargon File}]

(1997-10-01)




install english dictionary definition & meaning lookup widget!


english dictionary definition meaning工具:
Select Color:

































































english dictionary meaning information:
  • Auto - definition of auto by The Free Dictionary
    Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only
  • Essay Writing Service | EssayErudite. com
    ABOUT US We value excellent academic writing and strive to provide outstanding essay writing services each and every time you place an order We write essays, research papers, term papers, course works, reviews, theses and more, so our primary mission is to help you succeed academically
  • Think Julia: How to Think Like a Computer Scientist
    I knew the book Think Python by Allen Downey, which contains all the key ingredients to learn to program properly However, this book was based on the Python programming language My first draft of the course notes was a melting pot of all kinds of reference works, but the longer I worked on it, the more the content started to resemble the chapters of Think Python
  • Comprehensive NCLEX Questions Most Like The NCLEX
    Delegation strategies for the NCLEX, Prioritization for the NCLEX, Infection Control for the NCLEX, FREE resources for the NCLEX, FREE NCLEX Quizzes for the NCLEX, FREE NCLEX exams for the NCLEX, Failed the NCLEX - Help is here
  • Index sets up China shop – Variety
    Index Holdings, a mobile communications and media group, has launched a China office, Index China, through group company Index Asia Pacific, the company announced Thursday
  • SQL Developer Concepts and Usage - Oracle
    1 3 2 Restoring the Original "Look and Feel" If you have made changes to the SQL Developer user interface ("look and feel"), such as accidentally repositioning navigators and panes, you can restore the window to the way it was after SQL Developer was installed by clicking Window, then Reset Windows to Factory Settings (However, if you have customized the main toolbar and want to restore it
  • PTES Technical Guidelines - The Penetration Testing . . .
    This section is designed to be the PTES technical guidelines that help define certain procedures to follow during a penetration test Something to be aware of is that these are only baseline methods that have been used in the industry
  • Full text of NEW - Internet Archive
    Search the history of over 361 billion web pages on the Internet
  • www. mit. edu
    a aa aaa aaaa aaacn aaah aaai aaas aab aabb aac aacc aace aachen aacom aacs aacsb aad aadvantage aae aaf aafp aag aah aai aaj aal aalborg aalib aaliyah aall aalto aam





English Dictionary  2005-2009

|dictionary |Business Directories,Company Directories |ZIP Code,Postal Code