Hardware code page: Difference between revisions

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==Code page assignments==
In North American [[IBM-compatible PC]]s, the hardware code page of the display adapter is typically [[code page 437]].<ref name="Elliott_2005_MDA"/> However, various portable machines<ref name="HP_1985_PP"/><ref name="HP_1986_PP"/><ref name="HP_1991_95LXUG"/> as well as (Eastern) European, Arabic, Middle Eastern and Asian PCs used a number of other code pages as their hardware code page,<ref name="Paul_2001_CPSwitchFD"/> including [[code page 100]] ("Hebrew"),<ref name="Paul_2002-09-05"/> [[code page 151|151]] ("Nafitha Arabic"),<ref name="Paul_2002-12-04"/> [[code page 667|667]] ("[[Mazovia encoding|Mazovia]]"),<ref name="Paul_2001_CPSwitchFD"/><ref name="Fujitsu_1994_DL6400_DL6600"/> [[code page 737|737]] ("Greek"), [[code page 850|850]] ("Multilingual"),<ref name="HP_1991_95LXUG"/> encodings like "[[HP Roman-8|Roman-8]]",<ref name="HP_1985_PP"/><ref name="HP_1986_PP"/> "[[Kamenický encoding|Kamenický]]",<ref name="Paul_2001_CPSwitchFD"/><ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1992_Flyer"/> "[[KOI-8]]", "[[MIK code page|MIK]]",<ref name="Fujitsu_1994_DL6400_DL6600"/> and others. Most display adapters support a single 8-bit hardware code page only.<ref name="Paul_2001_CPSwitchFD"/> The [[bitmap]]s were often stored in an [[EPROM]]<ref name="RBIL_61_INT15h_AX67C3h"/><ref name="Brown_2000_RBIL"/><ref name="Elliott_2005_MDA"/> in a [[DIP socket]].<ref name="Elliott_2005_MDA"/> At most, the hardware code page to be activated was user-selectable via [[jumper (computing)|jumper]]s,<ref name="Derfler_1985"/> configuration [[EEPROM]]s<ref name="HP_1985_PP"/><ref name="HP_1986_PP"/> or [[CMOS setup]]. However, some of the display adapters designed for Eastern European, Arabic and Hebrew PCs supported multiple software-''switchable'' hardware code pages, also named '''font pages''',<ref name="Paul_2001_CPSwitchFD"/> selectable via I/O ports<ref name="Elliott_2005_MDA"/> or additional BIOS functions.<ref name="RBIL_61_INT15h_AX67C3h"/><ref name="Brown_2000_RBIL"/>
 
In contrast to this, printers frequently support several user-switchable character sets, often including various variants of the 7-bit [[ISO/IEC 646]] character sets such as [[code page 367]] ("[[ISO/IEC 646-US]] / [[ASCII]]"<ref name="Paul_2001_CPSwitchFD"/>), sometimes also a couple of 8-bit code pages like [[code page 437]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1990_P90"/><ref name="Epson_1991_GQ"/> [[code page 850|850]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1990_P90"/><ref name="Epson_1991_GQ"/> [[code page 851|851]],<ref name="Fujitsu_1994_DL6400_DL6600"/> [[code page 852|852]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1993_EPROMs"/> [[code page 853|853]],<ref name="Epson_1992_EPL-4300"/> [[code page 855|855]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1993_EPROMs"/> [[code page 857|857]],<ref name="Epson_1992_EPL-4300"/> [[code page 860|860]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1990_P90"/><ref name="Epson_1991_GQ"/> [[code page 861|861]],<ref name="Epson_1991_GQ"/> [[code page 863|863]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1990_P90"/><ref name="Epson_1991_GQ"/> [[code page 865|865]],<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1990_P90"/><ref name="Epson_1991_GQ"/> and [[code page 866|866]].<ref name="Fujitsu_1994_DL6400_DL6600"/><ref name="NEC_1993_EPROMs"/><ref name="FreeBSD_2016_1"/><ref name="FreeBSD_2016_2"/> Printers for the Eastern European or Middle Eastern markets sometimes support other locale-specific hardware code pages to choose from. They can be selected via [[DIP switch]]es or configuration menus on the printer, or via specific [[escape sequence]]s.<ref name="Paul_2001_CPSwitchFD"/><ref group="nb" name="Escape_sequence_Epson_NEC"/>
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<ref name="NEC_1983_APC">{{cite book |title=Advanced Personal Computer - MS-DOS System Programmer's Guide |publisher=[[NEC Corporation]] |author=[[NEC Information Systems, Inc.]] |date=November 1983
|id=part number 819-000104-3001 |edition=REV 00 |url=http://bitsavers.informatik.uni-stuttgart.de/pdf/nec/APC/NEC_APC_MS-DOS_System_Programmers_Guide_Sep83.pdf |access-date=2016-11-25 |dead-url=no |archive-url=https://web.archive.org/web/20161125154102/http://bitsavers.informatik.uni-stuttgart.de/pdf/nec/APC/NEC_APC_MS-DOS_System_Programmers_Guide_Sep83.pdf |archive-date=2016-11-25}}</ref>
<ref name="HP_1985_PP">{{cite book |title=Hewlett-Packard - Technical Reference Manual - Portable PLUS |date=August 1985 |edition=1 |id=45559-90001 |publisher=[[Hewlett-Packard Company]], Portable Computer Division |___location=Corvallis, OR, USA |url=https://archive.org/details/bitsavers_hpportableblePLUSTechnicalReferenceManualAug1985_25919880 |access-date=2016-11-27 |dead-url=no}}</ref>
<ref name="HP_1986_PP">{{cite book |title=Hewlett-Packard - Technical Reference Manual - Portable PLUS |date=December 1986 |orig-year=August 1985 |edition=2 |id=45559-90006 |publisher=[[Hewlett-Packard Company]] |___location=Portable Computer Division, Corvallis, OR, USA |url=http://www.jeffcalc.hp41.eu/hpplus/files/techrefman.pdf |access-date=2016-11-27 |dead-url=no |archive-url=https://web.archive.org/web/20161128194426/http://www.jeffcalc.hp41.eu/hpplus/files/techrefman.pdf |archive-date=2016-11-27}}</ref>
<ref name="HP_1991_95LXUG">{{cite book |title=HP 95LX User's Guide |publisher=[[Hewlett-Packard Company]], Corvallis Division |___location=Corvallis, OR, USA |edition=2 |date=June 1991 |orig-year=March 1991 |id=F0001-90003 |url=http://www.retroisle.com/others/hp95lx/OriginalDocs/95LX_UsersGuide_F1000-90001_826pages_Jun91.pdf |access-date=2016-11-27 |dead-url=no |archive-url=https://web.archive.org/web/20161128202642/http://www.retroisle.com/others/hp95lx/OriginalDocs/95LX_UsersGuide_F1000-90001_826pages_Jun91.pdf |archive-date=2016-11-27 |pages=E-1 – E-3, F-1 – F-7|quote=The [[HP 95LX]] character set is equivalent to [[code page 850]], the [[IBM PC]] multilingual character set. (Note that your HP 95LX contains [[MS-DOS 3.22]], which does not support [[code-page switching]].) All the HP 95LX applications use this set except [[Lotus 1-2-3|1-2-3]], which uses [[LICS (character set)|LICS]], the [[Lotus International Character Set]]. Most LICS characters are included in code page 850; the few that are not will not display […] If your HP 95LX cannot display […] or if your printer cannot print a LICS character, the HP 95LX uses a fallback presentation for that character […] if you use the <tt>©</tt> symbol and your printer cannot print it, the HP 95LX might display <tt>(c)</tt> or <tt>c</tt> as the fallback presentation (depending on the capabilities of your printer).}}</ref>
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