String To Number Conversion

These calls provide "number to string" and "string to number" conversions.

XFC #AHTOI (4)

Convert a hexadecimal number string into the equivalent binary number. On execution r0 must contain the address of the string to convert ( leading spaces in the string are skipped until a hex digit is found). The conversion continues until either eight hex digits have been found or a non hex digit is encountered. After execution the binary value is returned in r1, and r0 points to the byte after the last digit converted.

XFC #ADTOI (5)

Convert a decimal number string into the equivalent binary number. On execution r0 must contain the address of the string to convert (leading spaces in the string are skipped until a decimal digit is found). The conversion continues until either ten decimal digits have been found or a non decimal digit is encountered. After execution the binary value is returned in r1, and r0 points to the byte after the last digit converted.

XFC #ITOAH (6)

Convert a binary number into a hexadecimal string. On execution r0 contains the address of a buffer where the string will be placed, and r1 contains the integer to be converted. After execution r0 points to 1 byte past the end of the string.

XFC #ITOAD (7)

Convert a binary number into a decimal string. On execution r0 contains the address of a buffer where the string will be placed, and r1 contains the integer to be converted. After execution r0 points to 1 byte past the end of the string.