HP Forum Archive 21

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Mapping HP48 Text to Unicode Message #1 Posted by Chris Dreher on 9 Dec 2012, 1:19 a.m. Here is a table for how to translate HP48 text characters into Unicode characters, which is what modern computers use for text. Now HP48 developers create software that transfers, displays, or edits HP48 characters (ex: copying a file from an HP48 calc to a computer) with code that will reliably display a corresponding character. By using this mapping table, we should be able to avoid the garbage data, bugs, and crashes that has been an issue for some PC/Mac/Linux side HP48 software. Further details and explanations in an easier to read format is available at http://www.drehersoft.com/mapping-hp48-text-to-unicode Mapping HP48 Text to Unicode Most HP48 characters can be directly mapped to Unicode characters for the ranges of 0x00 to 0x1F, 0x20 to 0x7E, and 0xA0 to 0xFF. For example, an HP48 character of 'A' is 0x41 (65 in decimal) and in Unicode would be 0041 (65 in decimal). However, the 34 special characters of 0x1F and from 0x7F to 0x9F should be translated by the below table: HP48 Unicode Dec Hex Code Name --------- ------------ 31 1F 2026 Ellipsis 127 7F 2592 Medium Shade 128 80 2220 Measured Angle 129 81 0101 Latin Small Letter a with Macron 130 82 2207 Nabla 131 83 221A Square Root 132 84 222B Integral 133 85 03A3 Greek Capital Letter Sigma 134 86 25B6 Black Right-Pointing Triangle 135 87 03C0 Greek Small Letter Pi 136 88 2202 Partial Differential 137 89 2264 Less-Than or Equal To 138 8A 2265 Greater-Than or Equal To 139 8B 2260 Not Equal To 140 8C 03B1 Greek Small Letter Alpha 141 8D 2192 Rightwards Arrow 142 8E 2190 Leftwards Arrow 143 8F 2193 Downwards Arrow 144 90 2191 Upwards Arrow 145 91 03B3 Greek Small Letter Gamma 146 92 03B4 Greek Small Letter Delta 147 93 03B5 Greek Small Letter Epsilon 148 94 03B7 Greek Small Letter Eta 149 95 03B8 Greek Small Letter Theta 150 96 03BB Greek Small Letter Lamda 151 97 03C1 Greek Small Letter Rho 152 98 03C3 Greek Small Letter Sigma 153 99 03C4 Greek Small Letter Tau 154 9A 03C9 Greek Small Letter Omega 155 9B 0394 Greek Capital Letter Delta 156 9C 03A0 Greek Capital Letter Pi 157 9D 03A9 Greek Capital Letter Omega 158 9E 25A0 Black Square 159 9F 221E Infinity If you are using UTF-8, then it is necessary to encode each Unicode characters into the appropriate 1, 2, or 3 byte sequences. Resources Unicode Standard: http://unicode.org/ Unicode Character Name Index: http://www.unicode.org/charts/charindex.html UTF-8 summary: http://en.wikipedia.org/wiki/Utf-8

Re: Mapping HP48 Text to Unicode Message #2 Posted by peacecalc on 9 Dec 2012, 3:29 a.m., in response to message #1 by Chris Dreher Hello Chris, is that also a problem by transferring files between HP 50g and PC? If yes, it is possible to use same mapping table? Thank you for your efforts, peacecalc Edited: 9 Dec 2012, 3:30 a.m.

Re: Mapping HP48 Text to Unicode Message #3 Posted by Chris Dreher on 11 Dec 2012, 1:37 a.m., in response to message #2 by peacecalc I'm no expert on the HP 49/50 line of products. However, I did find an HP-49 manual at http://h10032.www1.hp.com/ctg/Manual/bpia5324.pdf Overall, the table I provided is fine with the following exceptions. Someone will need to search the Unicode tables for the correct character. Dec Hex Name 160 A0 Euro (HP changed the standard non-breaking space to the Euro character) 10 0A Newline 28 1B Large Left-pointing Black Arrow 29 1C Solid Black Cursor 30 1D Ellipse

Re: Mapping HP48 Text to Unicode Message #4 Posted by peacecalc on 11 Dec 2012, 12:33 p.m., in response to message #3 by Chris Dreher Hello Chris, thank you for sharing your knowledge! This is a good information for hp 50g user. Greetings peacecalc

Re: Mapping HP48 Text to Unicode Message #5 Posted by David Hayden on 10 Dec 2012, 4:38 p.m., in response to message #1 by Chris Dreher Chris, Thanks for putting this together. Can I suggest that you put it in the articles section of this forum? This seems like a useful bit of information. Dave

Re: Mapping HP48 Text to Unicode Message #6 Posted by Chris Dreher on 11 Dec 2012, 1:38 a.m., in response to message #5 by David Hayden That's a great idea! I'll look into writing one.

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