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

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[edit]

DEC Special[1][3]
_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _A _B _C _D _E _F
5_
80
NBSP
00A0
6_
96

25C6

2592

2409

240C

240D

240A
°
00B0
±
00B1

2424

240B

2518

2510

250C

2514

253C

23BA
7_
112

23BB

2500

23BC

23BD

251C

2524

2534

252C

2502

2264

2265
π
03C0

2260
£
00A3
·
00B7

  Letter  Number  Punctuation  Symbol  Other  Same as ASCII (not shown)

See also[edit]

References[edit]

  1. ^ a b Digital (1984). "Table 2-4: DEC Special Graphics Character Set". VT220 Programmer Reference Manual (2nd ed.).
  2. ^ Mascheck, Sven; Le Breton, Stefan; Hamilton, Richard L. "About the 'alternate linedrawing character set'". ~sven_mascheck/.
  3. ^ a b IBM. Code Page 01090 (PDF). Archived from the original (PDF) on 2015-07-08. Retrieved 2020-01-08.