Big-endian

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Big-endian is most often referred to the endianness or order of multiple Bytes inside a composite item, such as a Word (two bytes), a Double Word (four bytes) or a Quad Word (eight bytes), which keeps the byte order (in the arithmetical sense) in the reverse order of their addresses in memory - for instance the integer 16909060 or 0x01020304.
Big-Endian, big-end first (left, top)

Memory layout

0x01020304
Address
 Byte
 Significance
0x0000
 0x01
 MS Byte
0x0001
 0x02
0x0002
 0x03
0x0003
 0x04
 LS Byte

Big-Endian Files

File index 0 maps the H-File, index 7 the A-File.

Big-Endian Ranks

Rank index 0 maps the eight Rank, index 7 the first Rank.

Least Significant Ranks

squareIndex = 8*fileIndex + rankIndex
fileIndex   = squareIndex div 8
rankIndex   = squareIndex mod 8
The BERF-coordinates with Big-endian Files and Big-endian Ranks:
enum enumSquare {
  h8, h7, h6, h5, h4, h3, h2, h1, //  0 ..  7
  g8, g7, g6, g5, g4, g3, g2, g1, //  8 .. 15
  f8, f7, f6, f5, f4, f3, f2, f1, // 16 .. 23
  e8, e7, e6, e5, e4, e3, e2, e1, // 24 .. 31
  d8, d7, d6, d5, d4, d3, d2, d1, // 32 .. 39
  c8, c7, c6, c5, c4, c3, c2, c1, // 40 .. 47
  b8, b7, b6, b5, b4, b3, b2, b1, // 48 .. 55
  a8, a7, a6, a5, a4, a3, a2, a1, // 56 .. 63
};
Note: If printing boards from top to bottom, one has to start with the big-end rank.
     A    B    C    D    E    F    G    H
   +----+----+----+----+----+----+----+----+
 8 | 56 | 48 | 40 | 32 | 24 | 16 |  8 |  0 |  8th rank
   +----+----+----+----+----+----+----+----+
 7 | 57 | 49 | 41 | 33 | 25 | 17 |  9 |  1 |  7th rank
   +----+----+----+----+----+----+----+----+
 6 | 58 | 50 | 42 | 34 | 26 | 18 | 10 |  2 |  6th rank
   +----+----+----+----+----+----+----+----+
 5 | 59 | 51 | 43 | 35 | 27 | 19 | 11 |  3 |  5th rank
   +----+----+----+----+----+----+----+----+
 4 | 60 | 52 | 44 | 36 | 28 | 20 | 12 |  4 |  4th rank
   +----+----+----+----+----+----+----+----+
 3 | 61 | 53 | 45 | 37 | 29 | 21 | 13 |  5 |  3rd rank
   +----+----+----+----+----+----+----+----+
 2 | 62 | 54 | 46 | 38 | 30 | 22 | 14 |  6 |  2nd rank
   +----+----+----+----+----+----+----+----+
 1 | 63 | 55 | 47 | 39 | 31 | 23 | 15 |  7 |  1st rank
   +----+----+----+----+----+----+----+----+
     A    B    C    D    E    F    G    H - file(s)

Date-Format

The big-endian date format: yyyy-mm-dd.

See also


External Links


What links here?

Page Date Edited
6800 Jun 23, 2017
68000 Jun 7, 2016
68030 Jun 7, 2016
Big-endian Jan 25, 2015
Crafty Jan 28, 2018
Data Nov 26, 2017
Dictionary Aug 24, 2017
Double Word Jan 25, 2015
Endianness Jan 25, 2015
Extended Position Description Dec 2, 2017
Fairchild F8 Jul 31, 2015
Forsyth-Edwards Notation Sep 10, 2017
H8 Jul 21, 2015
IBM 360 Jan 2, 2016
Little-endian Jan 25, 2015
Nibble Jan 25, 2015
NoraGrace Nov 23, 2014
Nova Jan 20, 2016
Pieces Feb 19, 2018
PowerPC Oct 6, 2017
Quad Word Jan 25, 2015
Rasjid Chan Nov 26, 2014
SPARC Jan 17, 2017
Square Mapping Considerations Feb 28, 2018
Word Jan 25, 2015
Yunpeng Zhang Jul 9, 2016

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