Harold Hallikainen wrote:
> I'm working on a project where I have to display Unicode using a PIC
> driving a graphic display. I'm using Unifont
> (http://czyborra.com/unifont/) for the character bitmaps. However, there
> are THOUSANDS of bitmaps, more than will fit in flash in my 24hj256gp610.
> I'm particularly interested in covering the Americas, Europe, Japan, and
> China. So, I clearly have to include Unicode 0x0000 through 0x007f
> (ASCII), plus some of the supplemental and extended characters through
> 0x024f. The trick is what to cover for Chinese.
>
> Unifont defines the following Unicode code ranges:
>
> 128	U+0000..U+007F:Basic Latin
> 128	U+0080..U+00FF:Latin-1 Supplement
> 128	U+0100..U+017F:Latin Extended-A
> 156	U+0180..U+024F:Latin Extended-B
> 89	U+0250..U+02AF:IPA Extensions
> 57	U+02B0..U+02FF:Spacing Modifier Letters
> 72	U+0300..U+036F:Combining Diacritical Marks
> 105	U+0370..U+03FF:Greek
> 230	U+0400..U+04FF:Cyrillic
> 85	U+0530..U+058F:Armenian
> 82	U+0590..U+05FF:Hebrew
> 62	U+0600..U+06FF:Arabic
> 87	U+0E00..U+0E7F:Thai
> 65	U+0E80..U+0EFF:Lao
> 40	U+10A0..U+10FF:Georgian
> 348	U+1200..U+137F:Ethiopic
> 246	U+1E00..U+1EFF:Latin Extended Additional
> 233	U+1F00..U+1FFF:Greek Extended
> 77	U+2000..U+206F:General Punctuation
> 28	U+2070..U+209F:Superscripts and Subscripts
> 14	U+20A0..U+20CF:Currency Symbols
> 20	U+20D0..U+20FF:Combining Marks for Symbols
> 57	U+2100..U+214F:Letterlike Symbols
> 48	U+2150..U+218F:Number Forms
> 91	U+2190..U+21FF:Arrows
> 242	U+2200..U+22FF:Mathematical Operators
> 123	U+2300..U+23FF:Miscellaneous Technical
> 37	U+2400..U+243F:Control Pictures
> 11	U+2440..U+245F:Optical Character Recognition
> 139	U+2460..U+24FF:Enclosed Alphanumerics
> 128	U+2500..U+257F:Box Drawing
> 22	U+2580..U+259F:Block Elements
> 80	U+25A0..U+25FF:Geometric Shapes
> 106	U+2600..U+26FF:Miscellaneous Symbols
> 73	U+2700..U+27BF:Dingbats
> 256	U+2800..U+28FF:Braille Pattern Symbols
> 35	U+3000..U+303F:CJK Symbols and Punctuation
> 87	U+3040..U+309F:Hiragana
> 90	U+30A0..U+30FF:Katakana
> 37	U+3100..U+312F:Bopomofo
> 94	U+3130..U+318F:Hangul Compatibility Jamo
> 69	U+3200..U+32FF:Enclosed CJK Letters and Months
> 84	U+3300..U+33FF:CJK Compatibility
> 18174	U+4E00..U+9FFF:CJK Unified Ideographs
> 11172	U+AC00..U+D7A3:Hangul Syllables
> 270	U+F900..U+FAFF:CJK Compatibility Ideographs
> 57	U+FB00..U+FB4F:Alphabetic Presentation Forms
> 12	U+FB50..U+FDFF:Arabic Presentation Forms-A
> 4	U+FE20..U+FE2F:Combining Half Marks
> 28	U+FE30..U+FE4F:CJK Compatibility Forms
> 26	U+FE50..U+FE6F:Small Form Variants
> 140	U+FE70..U+FEFF:Arabic Presentation Forms-B
> 171	U+FF00..U+FFEF:Halfwidth and Fullwidth Forms
> 2	U+FFF0..U+FFFF:Specials
>
>
> Just covering CJK Compatibility Ideographs uses more flash than I have.
> So, ideas on what character ranges I should include, trying to fit this in
> flash?
>   
I think the simple answer is you won't be able to use CJK ideographs 
with that setup unless you can limit yourself to a small subset of 
possible characters which will have to be determined by someone who has 
both knowlage of your messages and knowlage of the languages in 
question, possiblly not even then.

You may want to consider using a serial flash or eeprom chip for 
character storage.


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