The Atari ST family of computers contained this font stored in ROM in three sizes; as an 8×16 pixels-per-character font used in the high-resolution graphics modes, as an 8×8 pixels-per-character font used in the low- and medium-resolution graphics modes, and as a 6×6 pixels-per-character font used for icon labels in any graphics mode.[1]
All 256 codes were assigned a graphical character in ROM, including the codes from 0 to 31 that in ASCII were reserved for non-graphical control characters.
Digital Research's Intel-based original GEM for IBM compatible PCs utilized the similar GEM character set, with certain accented Latin uppercase characters instead of Hebrew characters as well as a number of other differences.
The following table shows the Atari ST character set. Each character is shown with a potential Unicode equivalent if available. Differences from code page 437 are shown boxed.
Although the ROM provides a graphic for all 256 different possible 8-bit codes, some APIs will not print some of these code points, in particular the range 0–31 and the code at 127. Instead they will interpret them as control characters.
{{chset-table-header|Atari ST character set[4][5][6][7][8]}}0_ 0 | {{chset-ctrl|0000|NUL|0|fn={{Efn|0 may draw a blank space in some API.}}}} | {{chset-cell|21E7|⇧|1|fn={{Efn|name=fn1-8|1–8 are used in GEM AES user interface elements such as icons for closing, resizing and maximizing windows.}}}} | {{chset-cell|21E9|⇩|2|fn={{Efn|name=fn1-8}}}} | {{chset-cell|21E8|⇨|3|fn={{Efn|name=fn1-8}}}} | {{chset-cell|21E6|⇦|4|fn={{Efn|name=fn1-8}}}} | {{chset-cell|274E|❎|5|fn={{Efn|name=fn1-8}}}} | {{chset-cell | 6|fn={{Efn|name=fn1-8}}}} | {{chset-cell | 7|fn={{Efn|name=fn1-8}}}} | {{chset-cell|2713|✓|8|fn={{Efn|name=fn1-8}}}} | {{chset-cell|1F552|🕒|9}} | {{chset-cell|1F514|🔔|10}} | {{chset-cell|266A|♪|11}} | {{chset-cell|240C|␌|12}} | {{chset-cell|240D|␍|13}} | {{chset-cell | 14|fn={{Efn|name=fn14-15|14–15 (0Ehex–0Fhex) are 2 pieces that form an Atari "Fuji" logo, sometimes used together as an alternative to the title "Desk" for the leftmost menu in Atari ST software.}}}} | {{chset-cell | 15|fn={{Efn|name=fn14-15}}}} |
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1_ 16 | {{chset-cell | 0|10px}}|16|fn={{Efn|name=fn16-25|16–25 (10hex–19hex) are alternate representations of the digits 0–9 in the style of a seven-segment display. There are no direct Unicode equivalents although Unicode does have several other alternative sets of digits.}}}} | {{chset-cell | 1|10px}}|17|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 2|10px}}|18|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 3|10px}}|19|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 4|10px}}|20|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 5|10px}}|21|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 6|10px}}|22|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 7|10px}}|23|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 8|10px}}|24|fn={{Efn|name=fn16-25}}}} | {{chset-cell | 9|10px}}|25|fn={{Efn|name=fn16-25}}}} | {{chset-cell|0259|ə|26}} | {{chset-cell|241B|␛|27}} | {{chset-cell | 28|fn={{Efn|name=fn28-31|28–31 (1Chex–1Fhex) are 4 pieces that form the image of J. R. "Bob" Dobbs from the satirical Church of the SubGenius, a rarely used easter egg.}}}} | {{chset-cell | 29|fn={{Efn|name=fn28-31}}}} | {{chset-cell | 30|fn={{Efn|name=fn28-31}}}} | {{chset-cell | 31|fn={{Efn|name=fn28-31}}}} |
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2_ 32 | {{chset-ctrl|0020|SP|32}} | {{chset-cell|0021|!|33}} | {{chset-cell|0022|"|34}} | {{chset-cell|0023|#|35}} | {{chset-cell|0024|$|36}} | {{chset-cell|0025|%|37}} | {{chset-cell|0026|&|38}} | {{chset-cell|0027|'|39}} | {{chset-cell|0028|(|40}} | {{chset-cell|0029|)|41}} | {{chset-cell|002A|*|42}} | {{chset-cell|002B|+|43}} | {{chset-cell|002C|,|44}} | {{chset-cell|002D|-|45}} | {{chset-cell|002E|.|46}} | {{chset-cell|002F|/|47}} |
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3_ 48 | {{chset-cell|0030|0|48}} | {{chset-cell|0031|1|49}} | {{chset-cell|0032|2|50}} | {{chset-cell|0033|3|51}} | {{chset-cell|0034|4|52}} | {{chset-cell|0035|5|53}} | {{chset-cell|0036|6|54}} | {{chset-cell|0037|7|55}} | {{chset-cell|0038|8|56}} | {{chset-cell|0039|9|57}} | {{chset-cell|003A|:|58}} | {{chset-cell|003B|;|59}} | {{chset-cell|003C|<|60}} | {{chset-cell|003D|=|61}} | {{chset-cell|003E|>|62}} | {{chset-cell|003F|?|63}} |
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4_ 64 | {{chset-cell|0040|@|64}} | {{chset-cell|0041|A|65}} | {{chset-cell|0042|B|66}} | {{chset-cell|0043|C|67}} | {{chset-cell|0044|D|68}} | {{chset-cell|0045|E|69}} | {{chset-cell|0046|F|70}} | {{chset-cell|0047|G|71}} | {{chset-cell|0048|H|72}} | {{chset-cell|0049|I|73}} | {{chset-cell|004A|J|74}} | {{chset-cell|004B|K|75}} | {{chset-cell|004C|L|76}} | {{chset-cell|004D|M|77}} | {{chset-cell|004E|N|78}} | {{chset-cell|004F|O|79}} |
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5_ 80 | {{chset-cell|0050|P|80}} | {{chset-cell|0051|Q|81}} | {{chset-cell|0052|R|82}} | {{chset-cell|0053|S|83}} | {{chset-cell|0054|T|84}} | {{chset-cell|0055|U|85}} | {{chset-cell|0056|V|86}} | {{chset-cell|0057|W|87}} | {{chset-cell|0058|X|88}} | {{chset-cell|0059|Y|89}} | {{chset-cell|005A|Z|90}} | {{chset-cell|005B|[|91}} | {{chset-cell|005C|\|92}} | {{chset-cell|005D|]|93}} | {{chset-cell|005E|^|94}} | {{chset-cell|005F|_|95}} |
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6_ 96 | {{chset-cell|0060|`|96}} | {{chset-cell|0061|a|97}} | {{chset-cell|0062|b|98}} | {{chset-cell|0063|c|99}} | {{chset-cell|0064|d|100}} | {{chset-cell|0065|e|101}} | {{chset-cell|0066|f|102}} | {{chset-cell|0067|g|103}} | {{chset-cell|0068|h|104}} | {{chset-cell|0069|i|105}} | {{chset-cell|006A|j|106}} | {{chset-cell|006B|k|107}} | {{chset-cell|006C|l|108}} | {{chset-cell|006D|m|109}} | {{chset-cell|006E|n|110}} | {{chset-cell|006F|o|111}} |
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7_ 112 | {{chset-cell|0070|p|112}} | {{chset-cell|0071|q|113}} | {{chset-cell|0072|r|114}} | {{chset-cell|0073|s|115}} | {{chset-cell|0074|t|116}} | {{chset-cell|0075|u|117}} | {{chset-cell|0076|v|118}} | {{chset-cell|0077|w|119}} | {{chset-cell|0078|x|120}} | {{chset-cell|0079|y|121}} | {{chset-cell|007A|z|122}} | {{chset-cell|007B|{|123}} | {{chset-cell|007C|||124}} | {{chset-cell|007D|}|125}} | {{chset-cell|007E|~|126}} | {{chset-cell|0394|Δ|127}} |
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8_ 128 | {{chset-cell|00C7|Ç|128}} | {{chset-cell|00FC|ü|129}} | {{chset-cell|00E9|é|130}} | {{chset-cell|00E2|â|131}} | {{chset-cell|00E4|ä|132}} | {{chset-cell|00E0|à|133}} | {{chset-cell|00E5|å|134}} | {{chset-cell|00E7|ç|135}} | {{chset-cell|00EA|ê|136}} | {{chset-cell|00EB|ë|137}} | {{chset-cell|00E8|è|138}} | {{chset-cell|00EF|ï|139}} | {{chset-cell|00EE|î|140}} | {{chset-cell|00EC|ì|141}} | {{chset-cell|00C4|Ä|142}} | {{chset-cell|00C5|Å|143}} |
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9_ 144 | {{chset-cell|00C9|É|144}} | {{chset-cell|00E6|æ|145}} | {{chset-cell|00C6|Æ|146}} | {{chset-cell|00F4|ô|147}} | {{chset-cell|00F6|ö|148}} | {{chset-cell|00F2|ò|149}} | {{chset-cell|00FB|û|150}} | {{chset-cell|00F9|ù|151}} | {{chset-cell|00FF|ÿ|152}} | {{chset-cell|00D6|Ö|153}} | {{chset-cell|00DC|Ü|154}} | {{chset-cell|00A2|¢|155}} | {{chset-cell|00A3|£|156}} | {{chset-cell|00A5|¥|157}} | {{chset-cell|00DF|ß|{{Nowrap|158|fn={{Efn|name=fn158,225|158 (9Ehex) is the German sharp S (U+00DF, ß) produced by a German Atari ST keyboard's {{Key_press|ß}} key. 225 (E1hex) is the Greek lowercase beta (U+03B2, β) homoglyph. Note that code page 437 uses 158 for the ₧ symbol so 225 serves both functions there, and the Unicode Consortium's suggestion is to map code page 437's code point 225 to sharp S (U+00DF) presumably based on its more frequent use as the sharp S, despite that its surrounding code points are Greek characters.[1]}}}}}} | {{chset-cell|0192|ƒ|159}} |
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A_ 160 | {{chset-cell|00E1|á|160}} | {{chset-cell|00ED|í|161}} | {{chset-cell|00F3|ó|162}} | {{chset-cell|00FA|ú|163}} | {{chset-cell|00F1|ñ|164}} | {{chset-cell|00D1|Ñ|165}} | {{chset-cell|00AA|ª|166}} | {{chset-cell|00BA|º|167}} | {{chset-cell|00BF|¿|168}} | {{chset-cell|2310|⌐|169}} | {{chset-cell|00AC|¬|170}} | {{chset-cell|00BD|½|171}} | {{chset-cell|00BC|¼|172}} | {{chset-cell|00A1|¡|173}} | {{chset-cell|00AB|«|174}} | {{chset-cell|00BB|»|175}} |
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B_ 176 | {{chset-cell|00E3|ã|176}} | {{chset-cell|00F5|õ|177}} | {{chset-cell|00D8|Ø|178}} | {{chset-cell|00F8|ø|179}} | {{chset-cell|0153|œ|180}} | {{chset-cell|0152|Œ|181}} | {{chset-cell|00C0|À|182}} | {{chset-cell|00C3|Ã|183}} | {{chset-cell|00D5|Õ|184}} | {{chset-cell|00A8|¨|185}} | {{chset-cell|00B4|´|186}} | {{chset-cell|2020|†|187}} | {{chset-cell|00B6|¶|188}} | {{chset-cell|00A9|©|189}} | {{chset-cell|00AE|®|190}} | {{chset-cell|2122|™|191}} |
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C_ 192 | {{chset-cell|0133|ij|{{Nowrap|192|fn={{Efn|name=fn192-223|192–223 (C0hex–EFhex) are used for ij, IJ, the Hebrew alphabet, §, ∧ and ∞ on the Atari ST while they are used for box-drawing characters in code page 437.}}}}}} | {{chset-cell|0132|IJ|{{Nowrap|193|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D0|א|{{Nowrap|194|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D1|ב|{{Nowrap|195|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D2|ג|{{Nowrap|196|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D3|ד|{{Nowrap|197|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D4|ה|{{Nowrap|198|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D5|ו|{{Nowrap|199|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D6|ז|{{Nowrap|200|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D7|ח|{{Nowrap|201|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D8|ט|{{Nowrap|202|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05D9|י|{{Nowrap|203|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DB|כ|{{Nowrap|204|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DC|ל|{{Nowrap|205|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DE|מ|{{Nowrap|206|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E0|נ|{{Nowrap|207|fn={{Efn|name=fn192-223}}}}}} |
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D_ 208 | {{chset-cell|05E1|ס|{{Nowrap|208|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E2|ע|{{Nowrap|209|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E4|פ|{{Nowrap|210|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E6|צ|{{Nowrap|211|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E7|ק|{{Nowrap|212|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E8|ר|{{Nowrap|213|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E9|ש|{{Nowrap|214|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05EA|ת|{{Nowrap|215|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DF|ן|{{Nowrap|216|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DA|ך|{{Nowrap|217|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05DD|ם|{{Nowrap|218|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E3|ף|{{Nowrap|219|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|05E5|ץ|{{Nowrap|220|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|00A7|§|{{Nowrap|221|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|2227|∧|{{Nowrap|222|fn={{Efn|name=fn192-223}}}}}} | {{chset-cell|221E|∞|{{Nowrap|223|fn={{Efn|name=fn192-223}}}}}} |
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E_ 224 | {{chset-cell|03B1|α|224}} | {{chset-cell|03B2|β|{{Nowrap|225|fn={{Efn|name=fn158,225}}}}}} | {{chset-cell|0393|Γ|226}} | {{chset-cell|03C0|π|{{Nowrap|227|fn={{Efn|227 (E3hex) is the Greek lowercase pi (U+03C0, π), but early code page 437 fonts such as Terminal use a variant of pi that is ambiguous in case, and therefore can be used for the Greek capital pi (U+03A0, Π) or the n-ary product sign (U+220F, ∏).}}}}}} | {{chset-cell|03A3|Σ|{{Nowrap|228|fn={{Efn|228 (E4hex) is both the n-ary summation sign (U+2211, ∑) and the Greek uppercase sigma (U+03A3, Σ).}}}}}} | {{chset-cell|03C3|σ|229}} | {{chset-cell|00B5|µ|{{Nowrap|230|fn={{Efn|230 (E6hex) is both the micro sign (U+00B5, µ) and the Greek lowercase mu (U+03BC, μ).}}}}}} | {{chset-cell|03C4|τ|231}} | {{chset-cell|03A6|Φ|232}} | {{chset-cell|0398|Θ|233}} | {{chset-cell|03A9|Ω|{{Nowrap|234|fn={{Efn|234 (EAhex) is both the ohm sign (U+2126, Ω) and the Greek uppercase omega (U+03A9, Ω). (Unicode considers the ohm sign to be equivalent to uppercase omega, and suggests that the latter be used in both contexts.[2])}}}}}} | {{chset-cell|03B4|δ|{{Nowrap|235|fn={{Efn|235 (EBhex) is the Greek lowercase delta (U+03B4, δ), but it has also been used as a surrogate for the Icelandic lowercase eth (U+00F0, ð) and the partial derivative sign (U+2202, ∂).}}}}}} | {{chset-cell|222E|∮|{{Nowrap|236|fn={{Efn|236 (EChex) is used for the ∮ symbol on the Atari ST while code page 437 uses it for the ∞ symbol, which in turn the Atari ST places at 223.}}}}}} | {{chset-cell|03D5|ϕ|{{Nowrap|237|fn={{Efn|237 (EDhex) is both used as the empty set sign (U+2205, ∅), the Greek lowercase phi, the Greek phi symbol in italics (U+03D5, Φ) to name angles, and the diameter sign (U+2300, ⌀).}}}}}} | {{chset-cell|2208|∈|{{Nowrap|238|fn={{Efn|238 (EEhex) is both used as the Greek lowercase epsilon (U+03B5, ε) and the element-of sign (U+2208, ∈). Later it was often used for the euro sign (U+20AC, €).}}}}}} | {{chset-cell|2229|∩|239}} |
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F_ 240 | {{chset-cell|2261|≡|240}} | {{chset-cell|00B1|±|241}} | {{chset-cell|2265|≥|242}} | {{chset-cell|2264|≤|243}} | {{chset-cell|2320|⌠|244}} | {{chset-cell|2321|⌡|245}} | {{chset-cell|00F7|÷|246}} | {{chset-cell|2248|≈|247}} | {{chset-cell|00B0|°|248}} | {{chset-cell|2022|•|249}} | {{chset-cell|00B7|·|250}} | {{chset-cell|221A|√|251}} | {{chset-cell|207F|ⁿ|252}} | {{chset-cell|00B2|²|253}} | {{chset-cell|00B3|³|{{Nowrap|254|fn={{Efn|254 (FEhex) is used for the ³ symbol on the Atari ST while code page 437 uses it for the ■ symbol.}}}}}} | {{chset-ctrl|00AF|¯|{{Nowrap|255|fn={{Efn|255 (FFhex) is used for the ¯ symbol on the Atari ST while code page 437 uses it for the non-breaking space.}}}}}} |
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{{notelist}}Utilizing the Alt Numpad input method, users can enter a character by holding down the Alt key and entering the three-digit decimal code point on the Numpad. This provides a way to enter special characters not provided directly on the keyboard.
The Atari ST character set long pre-dates the introduction of the Euro currency and thus does not provide a code point for the Euro sign (U+20AC, €). However, some software (such as Calamus) utilized code point 238 (0xEE) for this purpose.[12][13] This code point is normally assigned to the mathematical element-of sign (U+2208, ∈), and to the Greek lowercase epsilon (U+03B5, ε) in code page 437.
Alternatively, the rarely used logical conjunction sign (U+2227, ∧) at code point 222 (0xDE) could be replaced by the euro sign.[14]
1. ^{{cite web |url=https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT |title=cp437_DOSLatinUS to Unicode table |format=TXT |publisher=The Unicode Consortium |access-date=2011-11-14}}
2. ^The Unicode Consortium, The Unicode Standard 4.0, Chapter 7, "European Alphabetic Scripts", p176. [https://www.unicode.org/versions/Unicode4.0.0/ch07.pdf#search=%22character%20U%2B2126%20maps%20OR%20map%20OR%20mapping%22 PDF version]
3. ^1 {{cite web |title=Locale::RecodeData::ATARI_ST - Conversion routines for ATARI-ST |author-first=Guido |author-last=Flohr |version=1.1 |work=CPAN libintl-perl |date=2016 |orig-year=2006 |url=http://search.cpan.org/~guido/libintl-perl/lib/Locale/RecodeData/ATARI_ST.pm |access-date=2017-01-14 |dead-url=no |archive-url=https://web.archive.org/web/20170114223110/http://search.cpan.org/~guido/libintl-perl/lib/Locale/RecodeData/ATARI_ST.pm |archive-date=2017-01-14}}
4. ^1 {{cite web |title=Locale::RecodeData::ATARI_ST_EURO - Conversion routines for ATARI-ST-EURO |author-first=Guido |author-last=Flohr |version=1.1 |work=CPAN libintl-perl |date=2016 |orig-year=2006 |url=http://search.cpan.org/~guido/libintl-perl/lib/Locale/RecodeData/ATARI_ST_EURO.pm |access-date=2017-01-14 |dead-url=no |archive-url=https://web.archive.org/web/20170114223252/http://search.cpan.org/~guido/libintl-perl/lib/Locale/RecodeData/ATARI_ST_EURO.pm |archive-date=2017-01-14}}
5. ^1 {{cite web |author-first1=Philippe |author-last1=Verdy |author-first2=Bruno |author-last2=Haible |author-first3=Ulf |author-last3=Zibis |author-first4=Yves-Marie K. |author-last4=Rinquin |orig-year=1998 |date=2015-10-08 |version=1.3 |title=AtariST to Unicode |url=ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MISC/ATARIST.TXT |access-date=2016-12-09 |dead-url=no}}
6. ^1 {{cite web |title=Codepages / Ascii Table Atari ST/TT Character Encoding |publisher=ASCII.ca |date=2016 |orig-year=2006 |url=http://www.ascii.ca/atarist.htm |access-date=2017-01-16 |dead-url=no |archive-url=https://web.archive.org/web/20170116125230/http://www.ascii.ca/atarist.htm |archive-date=2017-01-16}}
7. ^1 {{cite web |author-first=Rebecca G. |author-last=Bettencourt |title=Character Encodings - Legacy Encodings - Atari ST |publisher=Kreative Korporation |date=2016-08-01 |orig-year=1999 |url=http://www.kreativekorp.com/charset/encoding.php?name=Atari+ST |access-date=2016-08-09 |dead-url=no}}
8. ^1 {{cite web |author-first1=Kosta |author-last1=Kostis |author-first2=Alexander |author-last2=Lehmann |title=Atari ST/TT Character Encoding |version=1.56 |url=http://www.kostis.net/charsets/atarist.htm |access-date=2017-01-16 |dead-url=no |archive-url=https://web.archive.org/web/20170116124907/http://www.kostis.net/charsets/atarist.htm |archive-date=2017-01-16}}
9. ^1 {{cite journal |title=Calamus (2) |author-first=Ulf |author-last=Dunkel |date=July 1999 |journal=ST Computer |language=German |url=http://www.stcarchiv.de/stc1999/07/calamus |access-date=2017-01-16 |dead-url=no}}
10. ^1 {{cite web |title=Calamus: RTF 3.0 mit grossem Qualitaetssprung |author-first=Johannes |author-last=Hädrich |date=2002-12-14 |language=German |url=http://www.atari-home.de/2002/12/calamus-rtf-30-mit-grossem-qualitaetssprung/ |access-date=2017-01-16 |dead-url=no |archive-url=https://web.archive.org/web/20170116160429/http://www.atari-home.de/2002/12/calamus-rtf-30-mit-grossem-qualitaetssprung/ |archive-date=2017-01-16}}
11. ^1 2 {{cite journal |title=How do Europeans access special characters in the Atari ST character set? What is the 6x6 font used for? |author-first=John |author-last=Feagans |journal=Atari ST Developers Question and Answer Bulletin |publisher=Atari Corp. |location=Sunnyvale, CA, USA |date=May 1986 |url=http://dev-docs.atariforge.org/files/ASD_May-1986.pdf |access-date=2017-02-19 |dead-url=no |archive-url=https://web.archive.org/web/20170219102658/http://dev-docs.atariforge.org/files/ASD_May-1986.pdf |archive-date=2017-02-19}}