DEC Special Graphics

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]

DEC Special Graphics

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 on	ASCII
Other related encoding(s)	PETSCII

Character set

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

• DEC Multinational Character Set (MCS)
• DEC National Replacement Character Set (NRCS)
• DEC Technical Character Set
• DEC VT100
• Box-drawing character

References

1. 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. IBM. Code Page 01090 (PDF). Archived from the original (PDF) on 2015-07-08. Retrieved 2020-01-08.