DEC Special Graphics

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DEC Special Graphics
Shift In and Shift out on Linux.png
A modified DEC Special Graphics set (with additional fill blocks and arrows, and without the control pictures) accessed in a Linux terminal using Shift Out.
Alias(es)IBM-1090
Based onASCII
Other related encoding(s)PETSCII
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DEC Special Graphics[1] is a 7-bit character set developed by Digital Equipment Corporation. This was used very often to draw boxes on the VT100 video terminal and the many emulators, and used by bulletin board software. The designation escape sequence ESC ( 0 (hexadecimal 1B 28 30) switched the codes for lower-case ASCII letters to draw this set, and the sequence ESC ( B (hexadecimal 1B 28 42) switched back.[2] IBM calls it Code page 1090.[3]

Character set[]

DEC Special[1][3]
0 1 2 3 4 5 6 7 8 9 A B C D E F
5x NBSP
6x ◆ ▒[a] ␉ ␌ ␍ ␊ ° ± ␤ ␋ ┘ ┐ ┌ └ ┼ ⎺
7x ⎻ ─[b] ⎼ ⎽ ├ ┤ ┴ ┬ │ ≤ ≥ π ≠ £ ·
  Same as ASCII (not shown)

See also[]

Footnotes[]

  1. ^ In IBM's system of character IDs, this is SV240000,[3] not the SF150000 which is mapped to U+2592 ▒ in other code pages such as code page 437.[4] The reference glyph for SV240000 differs in showing a chequerboard pattern[3] rather than SF150000's dithered shade.[4] U+1FB95