bedstead/NOTES

Precise pixel layouts for mosaic graphics:

Based on a 6x10 grid of pixels:

............  000000111111  ..0000..1111  
......##....  000000111111  ..0000..1111
....##..##..  000000111111  ............
..##......##  222222333333  ..2222..3333
..##......##  222222333333  ..2222..3333
..##########  222222333333  ..2222..3333
..##......##  222222333333  ............
..##......##  444444555555  ..4444..5555
............  444444555555  ..4444..5555
............  444444555555  ............

Mosaic characters are not smoothed, and smoothing also doesn't apply
between mosaic characters and adjacent alphanumeric characters.

The SAA5050 series is generally compatible with the G0 primary
character sets defined by ETSI EN 300 706 V1.2.1:

SAA5050: Latin with English option
SAA5051: Latin with German option
SAA5052: Latin with Swedish option
SAA5053: Latin with Italian option
SAA5054: Latin with French option

SAA5057: Cyrillic (Russian)

There's no ETSI EN 300 706 character set that corresponds to the
SAA5055.  The ETSI EN 300 706 Hebrew set is almost identical to the
SAA5056 set, except that the old Sheqel sign on the SAA5056 is
replaced by the new Sheqel sign in ETSI EN 300 706.

ETSI EN 300 706 to Unicode mapping:

ZVBI, the Zapping teletext decoder has opinions on this:

 * Exceptions:
 * ETS 300 706 Table 36 Latin National Subset Turkish character
 * 0x23 Turkish currency symbol is not representable in Unicode,
 * translated to private code U+E800. Was unable to identify all
 * Arabic glyphs in Table 44 and 45 Arabic G0 and G2, these are
 * mapped to private code U+E620 ... U+E67F and U+E720 ... U+E77F
 * respectively. Table 47 G1 Block Mosaic is not representable
 * in Unicode, translated to private code U+EE00 ... U+EE7F.
 * (contiguous form has bit 5 set, separate form cleared).
 * Table 48 G3 Smooth Mosaics and Line Drawing Set is not
 * representable in Unicode, translated to private code U+EF20
 * ... U+EF7F.
 *
 * Note that some Teletext character sets contain complementary
 * Latin characters. For example the Greek capital letters Alpha
 * and Beta are reused as Latin capital letter A and B, while a
 * separate code exists for Latin capital letter C. This function
 * is unable to distinguish between uses, so it will always translate
 * Greek A and B to Alpha and Beta, C to Latin C.
 *
 * Private codes U+F000 ... U+F7FF are reserved for DRCS.

Latin G0 primary set is mostly ASCII, with the exception of:

0x24 0x00A4 # CURRENCY SIGN
0x7C 0x00A6 # BROKEN BAR
0x7F 0x25A0 # BLACK SQUARE

G0 national options each vary a few characters:

Czech/Slovak:
0x23 0x0023 # NUMBER SIGN
0x24 0x016F # LATIN SMALL LETTER U WITH RING ABOVE
0x40 0x010D # LATIN SMALL LETTER C WITH CARON
0x5B 0x0165 # LATIN SMALL LETTER T WITH CARON
0x5C 0x017E # LATIN SMALL LETTER Z WITH CARON
0x5D 0x00FD # LATIN SMALL LETTER Y WITH ACUTE
0x5E 0x00ED # LATIN SMALL LETTER I WITH ACUTE
0x5F 0x0159 # LATIN SMALL LETTER R WITH CARON
0x60 0x00E9 # LATIN SMALL LETTER E WITH ACUTE
0x7B 0x00E1 # LATIN SMALL LETTER A WITH ACUTE
0x7C 0x011B # LATIN SMALL LETTER E WITH CARON
0x7D 0x00FA # LATIN SMALL LETTER U WITH ACUTE
0x7E 0x0161 # LATIN SMALL LETTER S WITH CARON

English:
0x23 0x00A3 # POUND SIGN
0x24 0x0024 # DOLLAR SIGN
0x40 0x0040 # COMMERCIAL AT
0x5B 0x2190 # LEFTWARDS ARROW
0x5C 0x00BD # VULGAR FRACTION ONE HALF
0x5D 0x2192 # RIGHTWARDS ARROW
0x5E 0x2191 # UPWARDS ARROW
0x5F 0x0023 # NUMBER SIGN
0x60 0x2014 # EM DASH
0x7B 0x00BC # VULGAR FRACTION ONE QUARTER
0x7C 0x2016 # DOUBLE VERTICAL LINE
0x7D 0x00BE # VULGAR FRACTION THREE QUARTERS
0x7E 0x00F7 # DIVISION SIGN

Estonian:
0x23 0x0023 # NUMBER SIGN
0x24 0x00F5 # LATIN SMALL LETTER O WITH TILDE
0x40 0x0160 # LATIN CAPITAL LETTER S WITH CARON
0x5B 0x00C4 # LATIN CAPITAL LETTER A WITH DIAERESIS
0x5C 0x00D6 # LATIN CAPITAL LETTER O WITH DIAERESIS
0x5D 0x017D # LATIN CAPITAL LETTER Z WITH CARON
0x5E 0x00DC # LATIN CAPITAL LETTER U WITH DIAERESIS
0x5F 0x00D5 # LATIN CAPITAL LETTER O WITH TILDE
0x60 0x0161 # LATIN SMALL LETTER S WITH CARON
0x7B 0x00E4 # LATIN SMALL LETTER A WITH DIAERESIS
0x7C 0x00F6 # LATIN SMALL LETTER O WITH DIAERESIS
0x7D 0x017E # LATIN SMALL LETTER Z WITH CARON
0x7E 0x00FC # LATIN SMALL LETTER U WITH DIAERESIS

French:
0x23 0x00E9 # LATIN SMALL LETTER E WITH ACUTE
0x24 0x00EF # LATIN SMALL LETTER I WITH DIAERESIS
0x40 0x00E0 # LATIN SMALL LETTER A WITH GRAVE
0x5B 0x00EB # LATIN SMALL LETTER E WITH DIAERESIS
0x5C 0x00EA # LATIN SMALL LETTER E WITH CIRCUMFLEX
0x5D 0x00F9 # LATIN SMALL LETTER U WITH GRAVE
0x5E 0x00EE # LATIN SMALL LETTER I WITH CIRCUMFLEX
0x5F 0x0023 # NUMBER SIGN
0x60 0x00E8 # LATIN SMALL LETTER E WITH GRAVE
0x7B 0x00E2 # LATIN SMALL LETTER A WITH CIRCUMFLEX
0x7C 0x00F4 # LATIN SMALL LETTER O WITH CIRCUMFLEX
0x7D 0x00FB # LATIN SMALL LETTER U WITH CIRCUMFLEX
0x7E 0x00E7 # LATIN SMALL LETTER C WITH CEDILLA

German:
0x23 0x0023 # NUMBER SIGN
0x24 0x0024 # DOLLAR SIGN
0x40 0x00A7 # SECTION SIGN
0x5B 0x00C4 # LATIN CAPITAL LETTER A WITH DIAERESIS
0x5C 0x00D6 # LATIN CAPITAL LETTER O WITH DIAERESIS
0x5D 0x00DC # LATIN CAPITAL LETTER U WITH DIAERESIS
0x5E 0x005E # CIRCUMFLEX ACCENT
0x5F 0x005F # LOW LINE
0x60 0x00B0 # DEGREE SIGN
0x7B 0x00E4 # LATIN SMALL LETTER A WITH DIAERESIS
0x7C 0x00F6 # LATIN SMALL LETTER O WITH DIAERESIS
0x7D 0x00FC # LATIN SMALL LETTER U WITH DIAERESIS
0x7E 0x00DF # LATIN SMALL LETTER SHARP S

Italian:
0x23 0x00A3 # POUND SIGN
0x24 0x0024 # DOLLAR SIGN
0x40 0x00E9 # LATIN SMALL LETTER E WITH ACUTE
0x5B 0x00B0 # DEGREE SIGN
0x5C 0x00E7 # LATIN SMALL LETTER C WITH CEDILLA
0x5D 0x2192 # RIGHTWARDS ARROW
0x5E 0x2191 # UPWARDS ARROW
0x5F 0x0023 # NUMBER SIGN
0x60 0x00F9 # LATIN SMALL LETTER U WITH GRAVE
0x7B 0x00E0 # LATIN SMALL LETTER A WITH GRAVE
0x7C 0x00F2 # LATIN SMALL LETTER O WITH GRAVE
0x7D 0x00E8 # LATIN SMALL LETTER E WITH GRAVE
0x7E 0x00EC # LATIN SMALL LETTER I WITH GRAVE

Lettish/Lithuanian:
0x23 0x0023 # NUMBER SIGN
0x24 0x0024 # DOLLAR SIGN
0x40 0x0160 # LATIN CAPITAL LETTER S WITH CARON
0x5B 0x0117 # LATIN SMALL LETTER E WITH DOT ABOVE
0x5C 0x0229 # LATIN SMALL LETTER E WITH CEDILLA
# should 0x5C be U+0119 LATIN SMALL LETTER E WITH OGONEK?
0x5D 0x017D # LATIN CAPITAL LETTER Z WITH CARON
0x5E 0x010D # LATIN SMALL LETTER C WITH CARON
0x5F 0x016B # LATIN SMALL LETTER U WITH MACRON
0x60 0x0161 # LATIN SMALL LETTER S WITH CARON
0x7B 0x0105 # LATIN SMALL LETTER A WITH OGONEK
0x7C 0x0173 # LATIN SMALL LETTER U WITH OGONEK
0x7D 0x017E # LATIN SMALL LETTER Z WITH CARON
0x7E 0x012F # LATIN SMALL LETTER I WITH OGONEK

Polish:
0x23 0x0023 # NUMBER SIGN
0x24 0x0144 # LATIN SMALL LETTER N WITH ACUTE
0x40 0x0105 # LATIN SMALL LETTER A WITH OGONEK
0x5B 0x01B5 # LATIN CAPITAL LETTER Z WITH STROKE
0x5C 0x015A # LATIN CAPITAL LETTER S WITH ACUTE
0x5D 0x0141 # LATIN CAPITAL LETTER L WITH STROKE
0x5E 0x0107 # LATIN SMALL LETTER C WITH ACUTE
0x5F 0x00F3 # LATIN SMALL LETTER O WITH ACUTE
0x60 0x0119 # LATIN SMALL LETTER E WITH OGONEK
0x7B 0x017C # LATIN SMALL LETTER Z WITH DOT ABOVE
0x7C 0x015B # LATIN SMALL LETTER S WITH ACUTE
0x7D 0x0142 # LATIN SMALL LETTER L WITH STROKE
0x7E 0x017A # LATIN SMALL LETTER Z WITH ACUTE

Portuguese/Spanish:
0x23 0x00E7 # LATIN SMALL LETTER C WITH CEDILLA
0x24 0x0024 # DOLLAR SIGN
0x40 0x00A1 # INVERTED EXCLAMATION MARK
0x5B 0x00E1 # LATIN SMALL LETTER A WITH ACUTE
0x5C 0x00E9 # LATIN SMALL LETTER E WITH ACUTE
0x5D 0x00ED # LATIN SMALL LETTER I WITH ACUTE
0x5E 0x00F3 # LATIN SMALL LETTER O WITH ACUTE
0x5F 0x00FA # LATIN SMALL LETTER U WITH ACUTE
0x60 0x00BF # INVERTED QUESTION MARK
0x7B 0x00FC # LATIN SMALL LETTER U WITH DIAERESIS
0x7C 0x00F1 # LATIN SMALL LETTER N WITH TILDE
0x7D 0x00E8 # LATIN SMALL LETTER E WITH GRAVE
0x7E 0x00E0 # LATIN SMALL LETTER A WITH GRAVE

Rumanian:
0x23 0x0023 # NUMBER SIGN
0x24 0x00A4 # CURRENCY SIGN
0x40 0x0162 # LATIN CAPITAL LETTER T WITH CEDILLA
0x5B 0x00C2 # LATIN CAPITAL LETTER A WITH CIRCUMFLEX
0x5C 0x015E # LATIN CAPITAL LETTER S WITH CEDILLA
0x5D 0x01CD # LATIN CAPITAL LETTER A WITH CARON
# should 0x5D be U+0102 LATIN CAPITAL LETTER A WITH BREVE?
0x5E 0x00CD # LATIN CAPITAL LETTER I WITH ACUTE
0x5F 0x0131 # LATIN SMALL LETTER DOTLESS I
0x60 0x0163 # LATIN SMALL LETTER T WITH CEDILLA
0x7B 0x00E2 # LATIN SMALL LETTER A WITH CIRCUMFLEX
0x7C 0x015F # LATIN SMALL LETTER S WITH CEDILLA
0x7D 0X01CE # LATIN SMALL LETTER A WITH CARON
# should 0x7D be U+0103 LATIN SMALL LETTER A WITH BREVE?
0x7E 0x00EE # LATIN SMALL LETTER I WITH CIRCUMFLEX

Serbian/Croation/Slovenian:
0x23 0x0023 # NUMBER SIGN
0x24 0x00CB # LATIN CAPITAL LETTER E WITH DIAERESIS
0x40 0x010C # LATIN CAPITAL LETTER C WITH CARON
0x5B 0x0106 # LATIN CAPITAL LETTER C WITH ACUTE
0x5C 0x017D # LATIN CAPITAL LETTER Z WITH CARON
0x5D 0x00D0 # LATIN CAPITAL LETTER ETH
# should 0x5D be U+0110 LATIN CAPITAL LETTER D WITH STROKE?
0x5E 0x0160 # LATIN CAPITAL LETTER S WITH CARON
0x5F 0x00EB # LATIN SMALL LETTER E WITH DIAERESIS
0x60 0x010D # LATIN SMALL LETTER C WITH CARON
0x7B 0x0107 # LATIN SMALL LETTER C WITH ACUTE
0x7C 0x017E # LATIN SMALL LETTER Z WITH CARON
0x7D 0x00F0 # LATIN SMALL LETTER ETH
# should 0x5F be U+0111 LATIN SMALL LETTER D WITH STROKE?
0x7E 0x0161 # LATIN SMALL LETTER S WITH CARON

Swedish/Finnish:
0x23 0x0023 # NUMBER SIGN
0x24 0x00A4 # CURRENCY SIGN
0x40 0x00C9 # LATIN CAPITAL LETTER E WITH ACUTE
0x5B 0x00C4 # LATIN CAPITAL LETTER A WITH DIAERESIS
0x5C 0x00D6 # LATIN CAPITAL LETTER O WITH DIAERESIS
0x5D 0x00C5 # LATIN CAPITAL LETTER A WITH RING ABOVE
0x5E 0x00DC # LATIN CAPITAL LETTER U WITH DIAERESIS
0x5F 0x005F # LOW LINE
0x60 0x00E9 # LATIN SMALL LETTER E WITH ACUTE
0x7B 0x00E4 # LATIN SMALL LETTER A WITH DIAERESIS
0x7C 0x00F6 # LATIN SMALL LETTER O WITH DIAERESIS
0x7D 0x00E5 # LATIN SMALL LETTER A WITH RING ABOVE
0x7E 0x00FC # LATIN SMALL LETTER U WITH DIAERESIS

Turkish:
0x23 0xE800 # <private use>
0x24 0x011F # LATIN SMALL LETTER G WITH BREVE
0x40 0x0130 # LATIN CAPITAL LETTER I WITH DOT ABOVE
0x5B 0x015E # LATIN CAPITAL LETTER S WITH CEDILLA
0x5C 0x00D6 # LATIN CAPITAL LETTER O WITH DIAERESIS
0x5D 0x00C7 # LATIN CAPITAL LETTER C WITH CEDILLA
0x5E 0x00DC # LATIN CAPITAL LETTER U WITH DIAERESIS
0x5F 0x011E # LATIN CAPITAL LETTER G WITH BREVE
0x60 0x0131 # LATIN SMALL LETTER DOTLESS I
0x7B 0x015F # LATIN SMALL LETTER S WITH CEDILLA
0x7C 0x00F6 # LATIN SMALL LETTER O WITH DIAERESIS
0x7D 0x00E7 # LATIN SMALL LETTER C WITH CEDILLA
0x7E 0x00FC # LATIN SMALL LETTER U WITH DIAERESIS

Latin G2 supplementary set:
0x00A0 # NO-BREAK SPACE
0x00A1 # INVERTED EXCLAMATION MARK
0x00A2 # CENT SIGN
0x00A3 # POUND SIGN
0x0024 # DOLLAR SIGN
0x00A5 # YEN SIGN
0x0023 # NUMBER SIGN
0x00A7 # SECTION SIGN
0x00A4 # CURRENCY SIGN
0x2018 # LEFT SINGLE QUOTATION MARK
0x201C # LEFT DOUBLE QUOTATION MARK
0x00AB # LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
0x2190 # LEFTWARDS ARROW
0x2191 # UPWARDS ARROW
0x2192 # RIGHTWARDS ARROW
0x2193 # DOWNWARDS ARROW
0x00B0 # DEGREE SIGN
0x00B1 # PLUS-MINUS SIGN
0x00B2 # SUPERSCRIPT TWO
0x00B3 # SUPERSCRIPT THREE
0x00D7 # MULTIPLICATION SIGN
0x00B5 # MICRO SIGN
0x00B6 # PILCROW SIGN
0x00B7 # MIDDLE DOT
0x00F7 # DIVISION SIGN
0x2019 # RIGHT SINGLE QUOTATION MARK
0x201D # RIGHT DOUBLE QUOTATION MARK
0x00BB # RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
0x00BC # VULGAR FRACTION ONE QUARTER
0x00BD # VULGAR FRACTION ONE HALF
0x00BE # VULGAR FRACTION THREE QUARTERS
0x00BF # INVERTED QUESTION MARK
0x0020 # SPACE
0x02CB # MODIFIER LETTER GRAVE ACCENT
0x02CA # MODIFIER LETTER ACUTE ACCENT
0x02C6 # MODIFIER LETTER CIRCUMFLEX ACCENT
0x02DC # SMALL TILDE
0x02C9 # MODIFIER LETTER MACRON
0x02D8 # BREVE
0x02D9 # DOT ABOVE
0x00A8 # DIAERESIS
0x002E # FULL STOP
0x02DA # RING ABOVE
0x02CF # MODIFIER LETTER LOW ACUTE ACCENT
0x02CD # MODIFIER LETTER LOW MACRON
0x02DD # DOUBLE ACUTE ACCENT
0x02DB # OGONEK
0x02C7 # CARON
0x2014 # EM DASH
0x00B9 # SUPERSCRIPT ONE
0x00AE # REGISTERED SIGN
0x00A9 # COPYRIGHT SIGN
0x2122 # TRADE MARK SIGN
0x266A # EIGHTH NOTE
0x20A0 # EURO-CURRENCY SIGN
0x2030 # PER MILLE SIGN
0x0251 # LATIN SMALL LETTER ALPHA
0x0020 # SPACE
0x0020 # SPACE
0x0020 # SPACE
0x215B # VULGAR FRACTION ONE EIGHTH
0x215C # VULGAR FRACTION THREE EIGHTHS
0x215D # VULGAR FRACTION FIVE EIGHTHS
0x215E # VULGAR FRACTION SEVEN EIGHTHS
0x2126 # OHM SIGN
0x00C6 # LATIN CAPITAL LETTER AE
0x00D0 # LATIN CAPITAL LETTER ETH
# should this be U+0110 LATIN CAPITAL LETTER D WITH STROKE? See T.51.
0x00AA # FEMININE ORDINAL INDICATOR
0x0126 # LATIN CAPITAL LETTER H WITH STROKE 
0x0020 # SPACE
0x0132 # LATIN CAPITAL LIGATURE IJ
0x013F # LATIN CAPITAL LETTER L WITH MIDDLE DOT
0x0141 # LATIN CAPITAL LETTER L WITH STROKE
0x00D8 # LATIN CAPITAL LETTER O WITH STROKE
0x0152 # LATIN CAPITAL LIGATURE OE
0x00BA # MASCULINE ORDINAL INDICATOR
0x00DE # LATIN CAPITAL LETTER THORN
0x0166 # LATIN CAPITAL LETTER T WITH STROKE
0x014A # LATIN CAPITAL LETTER ENG
0x0149 # LATIN SMALL LETTER N PRECEDED BY APOSTROPHE
0x0138 # LATIN SMALL LETTER KRA
0x00E6 # LATIN SMALL LETTER AE
0x0111 # LATIN SMALL LETTER D WITH STROKE
0x00F0 # LATIN SMALL LETTER ETH
0x0127 # LATIN SMALL LETTER H WITH STROKE
0x0131 # LATIN SMALL LETTER DOTLESS I
0x0133 # LATIN SMALL LIGATURE IJ
0x0140 # LATIN SMALL LETTER L WITH MIDDLE DOT
0x0142 # LATIN SMALL LETTER L WITH STROKE
0x00F8 # LATIN SMALL LETTER L WITH STROKE
0x0153 # LATIN SMALL LIGATURE OE
0x00DF # LATIN SMALL LETTER SHARP S
0x00FE # LATIN SMALL LETTER THORN
0x0167 # LATIN SMALL LETTER T WITH STROKE
0x014B # LATIN SMALL LETTER ENG
0x25A0 # BLACK SQUARE

Cyrillic Russian option:
0x042E # CYRILLIC CAPITAL LETTER YU
0x0410 # CYRILLIC CAPITAL LETTER A
0x0411 # CYRILLIC CAPITAL LETTER BE
0x0426 # CYRILLIC CAPITAL LETTER TSE
0x0414 # CYRILLIC CAPITAL LETTER DE
0x0415 # CYRILLIC CAPITAL LETTER IE
0x0424 # CYRILLIC CAPITAL LETTER EF
0x0413 # CYRILLIC CAPITAL LETTER GHE
0x0425 # CYRILLIC CAPITAL LETTER HA
0x0418 # CYRILLIC CAPITAL LETTER I
0x040D # CYRILLIC CAPITAL LETTER I WITH GRAVE
# Should be U+0419 CYRILLIC CAPITAL LETTER SHORT I ?
0x041A # CYRILLIC CAPITAL LETTER KA
0x041B # CYRILLIC CAPITAL LETTER EL
0x041C # CYRILLIC CAPITAL LETTER EM
0x041D # CYRILLIC CAPITAL LETTER EN
0x041E # CYRILLIC CAPITAL LETTER O
0x041F # CYRILLIC CAPITAL LETTER PE
0x042F # CYRILLIC CAPITAL LETTER YA
0x0420 # CYRILLIC CAPITAL LETTER ER
0x0421 # CYRILLIC CAPITAL LETTER ES
0x0422 # CYRILLIC CAPITAL LETTER TE
0x0423 # CYRILLIC CAPITAL LETTER U
0x0416 # CYRILLIC CAPITAL LETTER ZHE
0x0412 # CYRILLIC CAPITAL LETTER VE
0x042C # CYRILLIC CAPITAL LETTER SOFT SIGN
0x042A # CYRILLIC CAPITAL LETTER HARD SIGN
0x0417 # CYRILLIC CAPITAL LETTER ZE
0x0428 # CYRILLIC CAPITAL LETTER SHA
0x042D # CYRILLIC CAPITAL LETTER E
0x0429 # CYRILLIC CAPITAL LETTER SHCHA
0x0427 # CYRILLIC CAPITAL LETTER CHE
0x042B # CYRILLIC CAPITAL LETTER YERU
0x044E # CYRILLIC SMALL LETTER YU
0x0430 # CYRILLIC SMALL LETTER A
0x0431 # CYRILLIC SMALL LETTER BE
0x0446 # CYRILLIC SMALL LETTER TSE
0x0434 # CYRILLIC SMALL LETTER DE
0x0435 # CYRILLIC SMALL LETTER IE
0x0444 # CYRILLIC SMALL LETTER EF
0x0433 # CYRILLIC SMALL LETTER GHE
0x0445 # CYRILLIC SMALL LETTER HA
0x0438 # CYRILLIC SMALL LETTER I
0x045D # CYRILLIC SMALL LETTER I WITH GRAVE
0x043A # CYRILLIC SMALL LETTER KA
0x043B # CYRILLIC SMALL LETTER EL
0x043C # CYRILLIC SMALL LETTER EM
0x043D # CYRILLIC SMALL LETTER EN
0x043E # CYRILLIC SMALL LETTER O
0x043F # CYRILLIC SMALL LETTER PE
0x044F # CYRILLIC SMALL LETTER YA
0x0440 # CYRILLIC SMALL LETTER ER
0x0441 # CYRILLIC SMALL LETTER ES
0x0442 # CYRILLIC SMALL LETTER TE
0x0443 # CYRILLIC SMALL LETTER U
0x0436 # CYRILLIC SMALL LETTER ZHE
0x0432 # CYRILLIC SMALL LETTER VE
0x044C # CYRILLIC SMALL LETTER SOFT SIGN
0x044A # CYRILLIC SMALL LETTER HARD SIGN
0x0437 # CYRILLIC SMALL LETTER ZE
0x0448 # CYRILLIC SMALL LETTER SHA
0x044D # CYRILLIC SMALL LETTER E
0x0449 # CYRILLIC SMALL LETTER SHCHA
0x0447 # CYRILLIC SMALL LETTER CHE
0x25A0 # BLACK SQUARE

Hebrew:
  0x2190u, 0x00BDu, 0x2192u, 0x2191u, 0x0023u,
  0x05D0u, 0x05D1u, 0x05D2u, 0x05D3u, 0x05D4u, 0x05D5u, 0x05D6u, 0x05D7u, 0x05D8u, 0x05D9u, 0x05DAu, 0x05DBu, 0x05DCu, 0x05DDu, 0x05DEu, 0x05DFu,
  0x05E0u, 0x05E1u, 0x05E2u, 0x05E3u, 0x05E4u, 0x05E5u, 0x05E6u, 0x05E7u, 0x05E8u, 0x05E9u, 0x05EAu, 0x20AAu, 0x2016u, 0x00BEu, 0x00F7u, 0x25A0u


ZVBI doesn't have a mapping for Arabic characters, but maybe we can.

0x20 0x0020
0x21 0x0021
0x22 0x0022
0x23 0x00A3
0x24 0x00A4
0x25 0x0025

0x40 0xFE94 # ARABIC LETTER TEH MARBUTA FINAL FORM
0x41 0xFE80 # ARABIC LETTER HAMZA ISOLATED FORM
0x42 0xFE92 # ARABIC LETTER BEH MEDIAL FORM
0x43 0xFE8F # ARABIC LETTER BEH ISOLATED FORM (also final?)
0x44 0xFE98 # ARABIC LETTER TEH MEDIAL FORM
0X45 0xFE95 # ARABIC LETTER TEH ISOLATED FORM (also final?)
0x46 0xFE8E # ARABIC LETTER ALEF FINAL FORM
0x47 0xFE8D # ARABIC LETTER ALEF ISOLATED FORM
0x48 0xFE91 # ARABIC LETTER BEH INITIAL FORM
0x49
0x4A 0xFE97 # ARABIC LETTER TEH INITIAL FORM
0x4B 0xFE9B # ARABIC LETTER THEH INITIAL FORM
0x4C 0xFE9F # ARABIC LETTER JEEM INITIAL FORM
0x4D 0xFEA3 # ARABIC LETTER HAH INITIAL FORM
0x4E 0xFEA7 # ARABIC LETTER KHAH INITIAL FORM
0x4F
0x50 0x0631 # ARABIC LETTER REH (final and isolated)
0x51 0x0630 # ARABIC LETTER THAL (final and isolated)
0x52 0xFEB3 # ARABIC LETTER SEEN INITIAL FORM (also medial)
0x53 0xFEB7 # ARABIC LETTER SHEEN INITIAL FORM (also medial)

0x5B 0xFE9C # ARABIC LETTER THEH MEDIAL FORM
0x5C 0xFEA0 # ARABIC LETTER JEEM MEDIAL FORM
0x5D 0xFEA4 # ARABIC LETTER HAH MEDIAL FORM
0x5E 0xFEA8 # ARABIC LETTER KHAH MEDIAL FORM

0x6B 0xFE99 # ARABIC LETTER THEH ISOLATED FORM (also final?)
0x6C 0xFE9D # ARABIC LETTER JEEM ISOLATED FORM (also final?)
0x6D 0xFEA1 # ARABIC LETTER HAH ISOLATED FORM (also final?)
0x6E 0xFEA5 # ARABIC LETTER KHAH ISOLATED FORM (also final?)

UK patent number 1343298 (filed 1971 by Mullard) describes the
character rounding technique used by the SAA5050.

FontForge's "Expand stroke" may be useful for converting single-line
font into something useful.  A 50-unit circular pen generates Bedstead
Plotter.  A 100×50-unit, 20° rectangular pen generates a surprisingly
good Bedstead Calligraphic.

Typographers seem to like explaining how to design their languages'
unique letters:

Æ and æ:
https://medium.com/@frodefrodefrode/designing-the-letter-%C3%A6-862cffbe22b

Polish characters
http://www.twardoch.com/download/polishhowto/

ẞ:
https://typography.guru/journal/capital-sharp-s-designs/
https://typography.guru/journal/how-to-draw-a-capital-sharp-s-r18/

Microsoft have their own suggestions:
https://docs.microsoft.com/en-gb/typography/develop/character-design-standards/

Good bitmap sizes for Bedstead fulfill two characteristics:

1: An integer number of output pixels per Bedstead pixel (so
horizontal and vertical lines work).

2: Edges of diagonals don't pass through pixel centres (so no doubt
whether any pixel is in or out).

The first requires that the height be 10n for integer n.

The second requires that the height _not_ be 40n for integer n.

So good sizes are 10, 20, 30, 50, 60, 70, 90, 100, etc.

The best sizes would be those where the area of a (long) diagonal line
is correct.  The outline version has an area of 1 - (0.25^2) + (0.75^2) =
1.5/pixel.  Others:

size | area/diagonal pixel
-----|--------------------
10   | 1
20   | 1+1/2 = 1.5
30   | 1+6/9 = 1.67
50   | 1+10/25 = 1.4
60   | 1+18/36 = 1.5
70   | 1+28/49 = 1.57
90   | 1+36/81 = 1.44
100  | 1+50/100 = 1.5

So the _very_ best sizes are 20, 60, 100, etc.  90 and 50 are pretty
good because they're between √2 and 1.5.