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lantern symbol?
by Brian Raiter
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Most of the ACS characters are self-explanatory, but the exception is
ACS_LANTERN, which is only described as a "lantern symbol". I've never been able to find a reference to what character this actually was. Most implementations either don't render this symbol, or else show the graphic representation of ASCII 12 (U+240B), for reasons I can only guess at. Does anybody know what the lantern symbol actually looked like on an actual VT-100? (Sadly I've only once had access to a real, physical VT-100, and it was in a situation without a machine to connect it to.) b _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Thomas Dickey-2
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On Wed, 9 Sep 2009, Brian Raiter wrote:
> Most of the ACS characters are self-explanatory, but the exception is > ACS_LANTERN, which is only described as a "lantern symbol". I've never > been able to find a reference to what character this actually was. > Most implementations either don't render this symbol, or else show the > graphic representation of ASCII 12 (U+240B), for reasons I can only > guess at. > > Does anybody know what the lantern symbol actually looked like on an > actual VT-100? It's not a VT-100 symbol - the comment in ncurses' curses.h says it's from a Teletype 5410v1 (the definition itself was from SVr4 curses). > (Sadly I've only once had access to a real, physical VT-100, and it > was in a situation without a machine to connect it to.) It's been a while since I've seen one (or vt220's or vt420's). -- Thomas E. Dickey http://invisible-island.net ftp://invisible-island.net _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Tim Allen-6
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On Wed, Sep 09, 2009 at 02:34:52PM -0700, Brian Raiter wrote:
> Does anybody know what the lantern symbol actually looked like on an > actual VT-100? I don't know myself (googling only seems to find hits for ncurses source-code, which whimsically maps it to U+2603 SNOWMAN), but I would expect from the name that it would look like a hurricane lantern, like U+2612 BALLOT BOX WITH X or perhaps U+2327 X IN A RECTANGLE BOX. _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Brian Raiter
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> On Wed, Sep 09, 2009 at 02:34:52PM -0700, Brian Raiter wrote:
>> Does anybody know what the lantern symbol actually looked like on an >> actual VT-100? > > I don't know myself (googling only seems to find hits for ncurses > source-code, which whimsically maps it to U+2603 SNOWMAN), but I would > expect from the name that it would look like a hurricane lantern, like > U+2612 BALLOT BOX WITH X or perhaps U+2327 X IN A RECTANGLE BOX. I'm not familiar with the term "hurricane lantern" referring to the x-in-a-box symbol. I suppose the term is meant to refer to the wires holding the glass shield, as they cross in front of the light? I agree, that seems a likely candidate. b _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Tim Allen-6
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On Wed, Sep 09, 2009 at 04:14:21PM -0700, Brian Raiter wrote:
> > On Wed, Sep 09, 2009 at 02:34:52PM -0700, Brian Raiter wrote: > >> Does anybody know what the lantern symbol actually looked like on an > >> actual VT-100? > > > > I don't know myself (googling only seems to find hits for ncurses > > source-code, which whimsically maps it to U+2603 SNOWMAN), but I would > > expect from the name that it would look like a hurricane lantern, like > > U+2612 BALLOT BOX WITH X or perhaps U+2327 X IN A RECTANGLE BOX. > > I'm not familiar with the term "hurricane lantern" referring to the > x-in-a-box symbol. I suppose the term is meant to refer to the wires > holding the glass shield, as they cross in front of the light? I > agree, that seems a likely candidate. I don't have any citations to back up my claim (it's a shame how many 'AT&T Teletype manual' archives don't list anything past the ASR33), but yes - once I figured out they probably meant a hurricane lantern, I just tried to imagine the simplest geometric representation of the glass with two crossed wires. Tim. _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Mike Gran
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> From: Tim Allen <screwtape@...>
> On Wed, Sep 09, 2009 at 04:14:21PM -0700, Brian Raiter wrote: > > > On Wed, Sep 09, 2009 at 02:34:52PM -0700, Brian Raiter wrote: > > >> Does anybody know what the lantern symbol actually looked like on an > > >> actual VT-100? > > > > > > I don't know myself (googling only seems to find hits for ncurses > > > source-code, which whimsically maps it to U+2603 SNOWMAN), but I would > > > expect from the name that it would look like a hurricane lantern, like > > > U+2612 BALLOT BOX WITH X or perhaps U+2327 X IN A RECTANGLE BOX. > > > > I'm not familiar with the term "hurricane lantern" referring to the > > x-in-a-box symbol. I suppose the term is meant to refer to the wires > > holding the glass shield, as they cross in front of the light? I > > agree, that seems a likely candidate. > > I don't have any citations to back up my claim (it's a shame how many > 'AT&T Teletype manual' archives don't list anything past the ASR33), but > yes - once I figured out they probably meant a hurricane lantern, I just > tried to imagine the simplest geometric representation of the glass with > two crossed wires. There is a pic of the VT220 glyphs here. http://vt100.net/dec/vt220/glyphs I think lantern is the one that looks like this (ASCII art) \__/ | | |__| / \ -Mike _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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Re: lantern symbol?
by Brian Raiter
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> There is a pic of the VT220 glyphs here.
> > http://vt100.net/dec/vt220/glyphs But the lantern symbol never existed on the VT220. > I think lantern is the one that looks like this (ASCII art) > > \__/ > | | > |__| > / \ Actually, in my experience most terminal fonts that try to support the ACS characters beyond the line-drawing characters will map the lantern symbol to the VT symbol (U+240B), which is the 11th symbol down on the leftmost column. Presumably this is because the those terminals are specifically emulating the VT220. b _______________________________________________ Bug-ncurses mailing list Bug-ncurses@... http://lists.gnu.org/mailman/listinfo/bug-ncurses |
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