4bit-ASCIIHex: ;***** UNTESTED!!! mov temp, w ;save the value mov w, #-09 add w, temp ;compare temp with 9 mov w, #'A' ;assume it will be more (no change to compare flags) snc ;if it was less mov w, #'0' ;correct the offset add w, temp ;add the offset to the value retSee: Compareing values in the "X < Y" section "fr < n" subsection for an explination of how the comparison works. For 8 bits you have to call that twice:
8bit-ASCIIHex: ;***** UNTESTED!!! mov w, <>byte ;w is byte with upper and lower nibbles reversed and w, #15 ;mask off the upper (was lower) 4 bits call 4bit-ASCIIHex ;convert that nibble to ASCII Hex call Output ;and send it off to where ever mov w, byte ;now get the actual value and w, #15 ;mask off the upper (really) 4 bits call 4bit-ASCIIHex ;convert this nibble to ASCII Hex call Output ;and send it off.
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<A HREF="http://www.sxlist.com/techref/scenix/lib/math/radix/b2a-4b1ah-jn.htm"> SX Microcontroller Radix Math Method - Binary to BCD half-packed 8 bit to 3 digit</A>
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