What means
It was a glyph in the computer’s European alternate display set. The Sharp MZ-700 alternate character slot 0x77 held this mark.
Introduced in 1982, this computer built pictures from fixed screen cells and extra glyphs. A settings byte selected the alternate table one cell at a time. The glyph could not be typed on the original keyboard; displaying it required writing to video memory with BASIC’s POKE command.
Unicode’s 2021 proposal supplied its descriptive name. A saltire is an X-shaped cross; computer makers usually showed legacy glyphs in charts without individual names.
Don't confuse it with
4Questions people ask
1Why does show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type
𜲉\1CC89Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
