When DOS uses CodePage 437, 18 is an up arrow glyph. A PC ANSI terminal interprets 18 as a control character.
Mike > -----Original Message----- > From: Ni, Ruiyu > Sent: Tuesday, November 7, 2017 11:47 PM > To: Kinney, Michael D <michael.d.kin...@intel.com>; > edk2-devel@lists.01.org > Cc: Dong, Eric <eric.d...@intel.com>; Zeng, Star > <star.z...@intel.com> > Subject: RE: [edk2] [Patch] MdeModulePkg/TerminalDxe: > Fix PCANSI mapping for TRIANGLE and ARROW > > Mike, > I am a bit confused about mapping 0x18 to upper arrow. > I remembered that in old days, pressing ALT+18 in DOS > window can generate upper arrow. > > Thanks/Ray > > > -----Original Message----- > > From: edk2-devel [mailto:edk2-devel- > boun...@lists.01.org] On Behalf Of > > Michael D Kinney > > Sent: Wednesday, November 8, 2017 12:24 PM > > To: edk2-devel@lists.01.org > > Cc: Dong, Eric <eric.d...@intel.com>; Zeng, Star > <star.z...@intel.com> > > Subject: [edk2] [Patch] MdeModulePkg/TerminalDxe: Fix > PCANSI mapping > > for TRIANGLE and ARROW > > > > https://bugzilla.tianocore.org/show_bug.cgi?id=761 > > > > When a TerminalType is set to PCANSI, characters in > the range 0x00 to 0x1F > > are control characters. The mapping table for PCANSI > maps TRIANGLE glyphs, > > ARROW_UP glyph, and ARROW_DOWN glyph into this > control character > > range and that causes no characters to be displayed > by PCANSI compatible > > terminal emulators. > > > > The mappings are updated so these glyphs are mapped > to ANSI characters in > > the range 0x20 to 0x7E. > > > > GEOMETRICSHAPE_UP_TRIANGLE '^' > > GEOMETRICSHAPE_RIGHT_TRIANGLE '>' > > GEOMETRICSHAPE_DOWN_TRIANGLE 'v' > > GEOMETRICSHAPE_LEFT_TRIANGLE '<' > > ARROW_UP '^' > > ARROW_DOWN 'v' > > > > Cc: Star Zeng <star.z...@intel.com> > > Cc: Eric Dong <eric.d...@intel.com> > > Contributed-under: TianoCore Contribution Agreement > 1.1 > > Signed-off-by: Michael D Kinney > <michael.d.kin...@intel.com> > > --- > > .../Universal/Console/TerminalDxe/TerminalConOut.c > | 18 +++++++++---- > > ----- > > 1 file changed, 9 insertions(+), 9 deletions(-) > > > > diff --git > > > a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalCo > nOut.c > > > b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalCo > nOut.c > > index e677a76e6b..5a8343162f 100644 > > --- > a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalCo > nOut.c > > +++ > b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalCo > nOut.c > > @@ -66,15 +66,15 @@ UNICODE_TO_CHAR > UnicodeToPcAnsiOrAscii[] = { > > { BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*' > }, > > { BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+' > }, > > > > - { GEOMETRICSHAPE_UP_TRIANGLE, 0x1e, L'^' > }, > > - { GEOMETRICSHAPE_RIGHT_TRIANGLE, 0x10, L'>' > }, > > - { GEOMETRICSHAPE_DOWN_TRIANGLE, 0x1f, L'v' > }, > > - { GEOMETRICSHAPE_LEFT_TRIANGLE, 0x11, L'<' > }, > > - > > - { ARROW_LEFT, 0x3c, L'<' > }, > > - { ARROW_UP, 0x18, L'^' > }, > > - { ARROW_RIGHT, 0x3e, L'>' > }, > > - { ARROW_DOWN, 0x19, L'v' > }, > > + { GEOMETRICSHAPE_UP_TRIANGLE, '^', L'^' }, > > + { GEOMETRICSHAPE_RIGHT_TRIANGLE, '>', L'>' }, > > + { GEOMETRICSHAPE_DOWN_TRIANGLE, 'v', L'v' }, > > + { GEOMETRICSHAPE_LEFT_TRIANGLE, '<', L'<' }, > > + > > + { ARROW_LEFT, '<', L'<' }, > > + { ARROW_UP, '^', L'^' }, > > + { ARROW_RIGHT, '>', L'>' }, > > + { ARROW_DOWN, 'v', L'v' }, > > > > { 0x0000, 0x00, L'\0' > } > > }; > > -- > > 2.14.2.windows.3 > > > > _______________________________________________ > > edk2-devel mailing list > > edk2-devel@lists.01.org > > https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
