Texas Instruments TI-89 and TI-92 Plus Computer 

Last page update: Sunday, November 21, 1999 
Roman Numerals - for the TI-89 and TI-92 Plus
Version 1.0   (Monday, September 07, 1999)
Download [ romnum.89f  | romnum.9xf ] (2,102 bytes)
Reference CRC Standard Mathematical Tables and Formula, 30th Edition, Paragraph 1.1.4.   
Description Converts to and from Roman numeral strings.  
Screen shots
Screen image 
Documentation Usage: 
RomNum(RomNumStr or RealNum

RomNumStr can be a single string or multiple strings, either upper or lower case, joined by mathematical operators. 
RealNum can be any real number. 

Real numbers cannot be combined with Roman numeral strings. 

Return value: 
This function returns a string of Roman numerals if given a real number, or a real number if given a strings of Roman numerals. 

1.  RomNum("xxvi"+"L") 

2. RomNum(1999) 

3. RomNum(log("M"))