C1 controls

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File Format
Name C1 controls
Ontology

The C1 controls are the control characters (code positions 128-159 decimal) which are defined by ISO/IEC 6429:1992 and are part of the ISO 8859 and other encodings. They are not often used, and in otherwise equivalent Microsoft character sets (e.g., Windows 1252) they are replaced by printing characters. It is common in both the web and e-mail for the character set to be announced as an ISO-8859 encoding but actually be in a Windows encoding, including the printable characters where these controls are located in the official standards, making it unsafe for software to even attempt to interpret them as control characters even though that is what the standards technically say to do in such cases. Because of their rarity of use, there is little agreement on their exact meaning and implementation.

Hex Dec Abbreviation Name Description and uses
80 128 PAD Padding Character Not part of ISO/IEC 6429.
81 129 HOP High Octet Preset Not part of ISO/IEC 6429. On Commodore computers, sets text color to orange.
82 130 BPH Break Permitted Here Follows a graphic character where a line break is permitted.
83 131 NBH No Break Here Follows a graphic character where a line break is not permitted.
84 132 IND Index Moves the active position one line down.
85 133 NEL Next Line Yet another line ending. On Commodore computers, Function Key 1.
86 134 SSA Start of Selected Area On Commodore computers, Function Key 3.
87 135 ESA End of Selected Area On Commodore computers, Function Key 5.
88 136 HTS Horizontal Tabulation Set Sets a horizontal tab stop. On Commodore computers, Function Key 7.
89 137 HTJ Horizontal Tabulation with Justification Sets a horizontal tab stop and indicates text should be justified out to the stop. On Commodore computers, Function Key 2.
8A 138 VTS Vertical Tabulation Set Sets a vertical tab stop. On Commodore computers, Function Key 4.
8B 139 PLD Partial Line Down Moves the active position down to a position suitable for subscripts, or undoes PLU. On Commodore computers, Function Key 6.
8C 140 PLU Partial Line Up Moves the active position up to a position suitable for superscripts, or undoes PLD. On Commodore computers, Function Key 8.
8D 141 RI Reverse Index Moves the active position one line up. On Commodore computers, used for line feed.
8E 142 SS2 Single-Shift 2 Indicates that the next code only should be interpreted in the G2 character set. On Commodore computers, Shift In.
8F 143 SS3 Single-Shift 3 Indicates that the next code only should be interpreted in the G3 character set.
90 144 DCS Device Control String Introduces a device control sequence, which is terminated by ST (0X9C). On Commodore computers, sets text color to black.
91 145 PU1 Private Use 1 On Commodore computers, Cursor Up.
92 146 PU2 Private Use 2 On Commodore computers, Reverse Video Off.
93 147 STS Set Transmit State On Commodore computers, Form Feed.
94 148 PCH Cancel Character Backspace and cancel the previous character. On Commodore computers, Insert.
95 149 MW Message Waiting On Commodore computers, set text color to brown.
96 150 SPA Start of Protected Area On Commodore computers, set text color to light red.
97 151 EPA End of Protected Area On Commodore computers, set text color to gray 1.
98 152 SOS Start of String Introduces a control string, which is terminated by ST (0X9C). On Commodore computers, set text color to gray 2.
99 153 SGCI Single Graphic Character Introducer Not part of ISO/IEC 6429. On Commodore computes, set text color to light green.
9A 154 SCI Single Character Introducer Followed by a single printing character or format effector. Meaning uncertain. On Commodore computers, set text color to light blue.
9B 155 CSI Control Sequence Introducer On Commodore computers, set text color to gray 3.
9C 156 ST String Terminator Marks the end of control sequences introduced by several C1 codes. On Commodore computers, set text color to purple.
9D 157 OSC Operating System Command Introduces an operating system command, which is terminated by ST (0X9C). On Commodore computers, Cursor Left.
9E 158 PM Privacy Message Introduces a privacy message, which is terminated by ST (0X9C). On Commodore computers, set text color to yellow.
9F 159 APC Application Program Command Introduces an application program command, which is terminated by ST (0X9C). On Commodore computers, set text color to cyan.

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