Editing Box-drawing characters (section)

===Historical===
Many [[microcomputer]]s of the 1970s and 1980s had their own proprietary character sets, which also included box-drawing characters. Many of these were added to Unicode as [[Symbols for Legacy Computing]].

====Commodore====
{{main|PETSCII}}
Commodore machines, such as the [[Commodore PET]] and the [[Commodore 64]], included a set of text semigraphics with block elements and dithering patterns in the PETSCII character set.
[[File:PET Keyboard.svg|640px|thumb|left|[[Commodore PET|PET 2001]] keyboard layout, illustrating PETSCII graphics characters]]
{{clear}}
====Sinclair====
[[File:ZX81.chars.00-0A.80-8A.png|frame|ZX81 semigraphics]]
{{see also|ZX80 character set|ZX81 character set|ZX Spectrum character set}}
The [[Sinclair ZX80]], [[Sinclair ZX81|ZX81]], and [[ZX Spectrum]] included a set of text semigraphics with quadrant-based block elements. The ZX80 and ZX81 also included a set of text semigraphics with dithering patterns.
{{clear}}

====BBC and Acorn====
The [[BBC Micro#Display modes|BBC Micro]] could utilize the [[Teletext]] 7-bit character set, which had 128 box-drawing characters, whose code points were shared with the regular alphanumeric and punctuation characters. [[Control characters]] were used to switch between regular text and box drawing.<ref name="Teletex_1976"/>

{| class="wikitable"
|+ Teletext G1 Block Mosaics Set<ref>{{citation |title=Enhanced Teletext specification |url=https://www.etsi.org/deliver/etsi_i_ets/300700_300799/300706/01_60/ets_300706e01p.pdf#page=126 |publisher=European Telecommunications Standards Institute |page=126 |date=May 1997}}</ref>
!
!0!!1!!2!!3!!4!!5!!6!!7!!8!!9!!A!!B!!C!!D!!E!!F
|-
!2
| [[File:TRS-80 character 0x80.png|NBSP]]
| [[File:TRS-80 character 0x81.png|🬀]]
| [[File:TRS-80 character 0x82.png|🬁]]
| [[File:TRS-80 character 0x83.png|🬂]]
| [[File:TRS-80 character 0x84.png|🬃]]
| [[File:TRS-80 character 0x86.png|🬄]]
| [[File:TRS-80 character 0x85.png|🬅]]
| [[File:TRS-80 character 0x87.png|🬆]]
| [[File:TRS-80 character 0x88.png|🬇]]
| [[File:TRS-80 character 0x89.png|🬈]]
| [[File:TRS-80 character 0x8A.png|🬉]]
| [[File:TRS-80 character 0x8B.png|🬊]]
| [[File:TRS-80 character 0x8C.png|🬋]]
| [[File:TRS-80 character 0x8D.png|🬌]]
| [[File:TRS-80 character 0x8E.png|🬍]]
| [[File:TRS-80 character 0x8F.png|🬎]]
|-
!3
| [[File:TRS-80 character 0x90.png|🬏]]
| [[File:TRS-80 character 0x91.png|🬐]]
| [[File:TRS-80 character 0x92.png|🬑]]
| [[File:TRS-80 character 0x93.png|🬒]]
| [[File:TRS-80 character 0x94.png|🬓]]
| [[File:TRS-80 character 0x95.png|▌]]
| [[File:TRS-80 character 0x96.png|🬔]]
| [[File:TRS-80 character 0x97.png|🬕]]
| [[File:TRS-80 character 0x98.png|🬖]]
| [[File:TRS-80 character 0x99.png|🬗]]
| [[File:TRS-80 character 0x9A.png|🬘]]
| [[File:TRS-80 character 0x9B.png|🬙]]
| [[File:TRS-80 character 0x9C.png|🬚]]
| [[File:TRS-80 character 0x9D.png|🬛]]
| [[File:TRS-80 character 0x9E.png|🬜]]
| [[File:TRS-80 character 0x9F.png|🬝]]
|-
!6
| [[File:TRS-80 character 0xA0.png|🬞]]
| [[File:TRS-80 character 0xA1.png|🬟]]
| [[File:TRS-80 character 0xA2.png|🬠]]
| [[File:TRS-80 character 0xA3.png|🬡]]
| [[File:TRS-80 character 0xA4.png|🬢]]
| [[File:TRS-80 character 0xA5.png|🬣]]
| [[File:TRS-80 character 0xA6.png|🬤]]
| [[File:TRS-80 character 0xA7.png|🬥]]
| [[File:TRS-80 character 0xA8.png|🬦]]
| [[File:TRS-80 character 0xA9.png|🬧]]
| [[File:TRS-80 character 0xAA.png|▐]]
| [[File:TRS-80 character 0xAB.png|🬨]]
| [[File:TRS-80 character 0xAC.png|🬩]]
| [[File:TRS-80 character 0xAD.png|🬪]]
| [[File:TRS-80 character 0xAE.png|🬫]]
| [[File:TRS-80 character 0xAF.png|🬬]]
|-
!7
| [[File:TRS-80 character 0xB0.png|🬭]]
| [[File:TRS-80 character 0xB1.png|🬮]]
| [[File:TRS-80 character 0xB2.png|🬯]]
| [[File:TRS-80 character 0xB3.png|🬰]]
| [[File:TRS-80 character 0xB4.png|🬱]]
| [[File:TRS-80 character 0xB5.png|🬲]]
| [[File:TRS-80 character 0xB6.png|🬳]]
| [[File:TRS-80 character 0xB7.png|🬴]]
| [[File:TRS-80 character 0xB8.png|🬵]]
| [[File:TRS-80 character 0xB9.png|🬶]]
| [[File:TRS-80 character 0xBA.png|🬷]]
| [[File:TRS-80 character 0xBB.png|🬸]]
| [[File:TRS-80 character 0xBC.png|🬹]]
| [[File:TRS-80 character 0xBD.png|🬺]]
| [[File:TRS-80 character 0xBE.png|🬻]]
| [[File:TRS-80 character 0xBF.png|█]]
|}
{| class="wikitable"
|+ Braille Sextant Mosaics Set<ref>{{citation |title=Enhanced Teletext specification |url=https://www.etsi.org/deliver/etsi_i_ets/300700_300799/300706/01_60/ets_300706e01p.pdf#page=126 |publisher=European Telecommunications Standards Institute |page=126 |date=May 1997}}</ref>{{verification failed|date=February 2025}}
!
!0!!1!!2!!3!!4!!5!!6!!7!!8!!9!!A!!B!!C!!D!!E!!F
|-
!2
| [[File:TRS-80 character 0x80.png|NBSP]]
| [[File:TRS-80 character 0xB6.png|🬳]]
| [[File:TRS-80 character 0x88.png|🬇]]
| [[File:TRS-80 character 0xBA.png|🬷]]
| [[File:TRS-80 character 0xA7.png|🬥]]
| [[File:TRS-80 character 0xA3.png|🬡]]
| [[File:TRS-80 character 0xB7.png|🬴]]
| [[File:TRS-80 character 0x90.png|🬏]]
| [[File:TRS-80 character 0xBD.png|🬺]]
| [[File:TRS-80 character 0xBE.png|🬻]]
| [[File:TRS-80 character 0xA1.png|🬟]]
| [[File:TRS-80 character 0xB2.png|🬯]]
| [[File:TRS-80 character 0xA0.png|🬞]]
| [[File:TRS-80 character 0xB0.png|🬭]]
| [[File:TRS-80 character 0xA2.png|🬠]]
| [[File:TRS-80 character 0x92.png|🬑]]
|-
!3
| [[File:TRS-80 character 0xB8.png|🬵]]
| [[File:TRS-80 character 0x84.png|🬃]]
| [[File:TRS-80 character 0x94.png|🬓]]
| [[File:TRS-80 character 0x8C.png|🬋]]
| [[File:TRS-80 character 0xAC.png|🬩]]
| [[File:TRS-80 character 0xA4.png|🬢]]
| [[File:TRS-80 character 0x9C.png|🬚]]
| [[File:TRS-80 character 0xBC.png|🬹]]
| [[File:TRS-80 character 0xB4.png|🬱]]
| [[File:TRS-80 character 0x98.png|🬖]]
| [[File:TRS-80 character 0xA9.png|🬧]]
| [[File:TRS-80 character 0xA8.png|🬦]]
| [[File:TRS-80 character 0xA5.png|🬣]]
| [[File:TRS-80 character 0xBF.png|█]]
| [[File:TRS-80 character 0x9A.png|🬘]]
| [[File:TRS-80 character 0xAB.png|🬨]]
|-
!4
| [[File:TRS-80 character 0x82.png|🬁]]
| [[File:TRS-80 character 0x81.png|🬀]]
| [[File:TRS-80 character 0x86.png|🬄]]
| [[File:TRS-80 character 0x83.png|🬂]]
| [[File:TRS-80 character 0x8B.png|🬊]]
| [[File:TRS-80 character 0x89.png|🬈]]
| [[File:TRS-80 character 0x87.png|🬆]]
| [[File:TRS-80 character 0x8F.png|🬎]]
| [[File:TRS-80 character 0x8D.png|🬌]]
| [[File:TRS-80 character 0x85.png|🬅]]
| [[File:TRS-80 character 0x8E.png|🬍]]
| [[File:TRS-80 character 0x91.png|🬐]]
| [[File:TRS-80 character 0x95.png|▌]]
| [[File:TRS-80 character 0x93.png|🬒]]
| [[File:TRS-80 character 0x9B.png|🬙]]
| [[File:TRS-80 character 0x99.png|🬗]]
|-
!5
| [[File:TRS-80 character 0x97.png|🬕]]
| [[File:TRS-80 character 0x9F.png|🬝]]
| [[File:TRS-80 character 0x9D.png|🬛]]
| [[File:TRS-80 character 0x96.png|🬔]]
| [[File:TRS-80 character 0x9E.png|🬜]]
| [[File:TRS-80 character 0xB1.png|🬮]]
| [[File:TRS-80 character 0xB5.png|🬲]]
| [[File:TRS-80 character 0xAE.png|🬫]]
| [[File:TRS-80 character 0xB3.png|🬰]]
| [[File:TRS-80 character 0xBB.png|🬸]]
| [[File:TRS-80 character 0xB9.png|🬶]]
| [[File:TRS-80 character 0xA6.png|🬤]]
| [[File:TRS-80 character 0xAD.png|🬪]]
| [[File:TRS-80 character 0xAF.png|🬬]]
| [[File:TRS-80 character 0x8A.png|🬉]]
| [[File:TRS-80 character 0xAA.png|▐]]
|}
The [[BBC Master]] and later [[Acorn Computers|Acorn]] computers have the soft font by default defined with line drawing characters.

{| class="wikitable"
!
!0!!1!!2!!3!!4!!5!!6!!7!!8!!9!!A!!B!!C!!D!!E!!F
|-
!A
| ||╷||╶||┌||╴||┐||─||┬||╵||│||└||├||┘||┤||┴||┼
|-
!B
|╭||╮||╰||╯|| || || || || || || || || || || || 
|}

====Amstrad====
The [[Amstrad CPC character set]] also has soft characters defined by default as block and line drawing characters.

{| class="wikitable"
!
!0!!1!!2!!3!!4!!5!!6!!7!!8!!9!!A!!B!!C!!D!!E!!F
|-
!8
| ||▘||▝||▀||▖||▍||▞||▛||▗||▚||▐||▜||▃||▙||▟||▉
|-
!9
| ||╵||╶||└||╷||│||┌||├||╴||┘||─||┴||┐||┤||┬||┼
|}

The [[CP/M Plus character set]] used on various [[Amstrad]] computers of the [[Amstrad CPC|CPC]], [[Amstrad PCW|PCW]] and [[Amstrad ZX Spectrum +3|Spectrum]] families included a rich set of line-drawing characters as well:<ref name="Plus3CPM"/><ref name="Elliott_2015_XBIOS"/><ref name="AT_CPMPlus_CS"/>

{| class="wikitable"
! <ref name="Plus3CPM"/>
!0!!1!!2!!3!!4!!5!!6!!7!!8!!9!!A!!B!!C!!D!!E!!F
|-
!8
| ||╧||╟||╚||╤||║||╔||╠||╢||╝||═||╩||╗||╣||╦||╬
|-
!9
| ||╵||╶||└||╷||│||┌||├||╴||┘||─||┴||┐||┤||┬||┼
|}

====Apple====
[[MouseText]] is a set of display characters for the [[Apple IIc]], [[Apple IIe|IIe]], and [[Apple IIGS|IIGS]] that includes box-drawing characters.