Converting Binary Coded Decimal

From BeebWiki
Revision as of 23:58, 28 August 2013 by WikiSysop (talk | contribs) (1 revision)
Jump to: navigation, search

Binary Coded Decimal (BCD) is a method of representing a decimal number as a hexadecimal value using the hex digits 0-9 and ignoring A-F. For example, the number 21 (hex &15) would be represented as &21 (decimal 33). It can be a convenient internal representation of decimal numbers as each hexadecimal digit can be displayed without any further processing. See Wikipedia. BCD values can be decoded with: 

     number% = VALSTR$~bcd%

Numbers can be encoded in BCD using: 

     bcd% = EVAL("&"+STR$number%)

Jgharston 21:11, 23 June 2007 (BST)

Retrieved from "http://beebwiki.mdfs.net/index.php?title=Converting_Binary_Coded_Decimal&oldid=1451"