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2. Intel BCD opcodes - Wikipedia

   en.wikipedia.org/wiki/Intel_BCD_opcodes

   The Intel BCD opcodes are a set of six x86 instructions that operate with binary-coded decimal numbers. The radix used for the representation of numbers in the x86 processors is 2. This is called a binary numeral system. However, the x86 processors do have limited support for the decimal numeral system . In addition, the x87 part supports a ...

3. x86 instruction listings - Wikipedia

   en.wikipedia.org/wiki/X86_instruction_listings

   ASCII adjust AL after addition: used with unpacked binary-coded decimal: 0x37: AAD: ASCII adjust AX before division: 8086/8088 datasheet documents only base 10 version of the AAD instruction (opcode 0xD5 0x0A), but any other base will work. Later Intel's documentation has the generic form too.

4. Binary-coded decimal - Wikipedia

   en.wikipedia.org/wiki/Binary-coded_decimal

   Decimal: 9 1. Binary : 1001 0001. Hence the numerical range for one unpacked BCD byte is zero through nine inclusive, whereas the range for one packed BCD byte is zero through ninety-nine inclusive. To represent numbers larger than the range of a single byte any number of contiguous bytes may be used.

5. Half-carry flag - Wikipedia

   en.wikipedia.org/wiki/Half-carry_flag

   For example, adding the decimal value 25 and 48, which are encoded as the BCD values 25 16 and 48 16, the binary addition of the two values produces 6D 16. Since the lower nibble of this value is a non-decimal digit (D), it must be adjusted by adding 06 16 to produce the correct BCD result of 73 16 , which represents the decimal value 73.

6. Fixed-point arithmetic - Wikipedia

   en.wikipedia.org/wiki/Fixed-point_arithmetic

   Fixed-point arithmetic. In computing, fixed-point is a method of representing fractional (non-integer) numbers by storing a fixed number of digits of their fractional part. Dollar amounts, for example, are often stored with exactly two fractional digits, representing the cents (1/100 of dollar). More generally, the term may refer to ...

7. Floating-point arithmetic - Wikipedia

   en.wikipedia.org/wiki/Floating-point_arithmetic

   In computing, floating-point arithmetic ( FP) is arithmetic that represents subsets of real numbers using an integer with a fixed precision, called the significand, scaled by an integer exponent of a fixed base. Numbers of this form are called floating-point numbers. [ 1]: 3 [ 2]: 10 For example, 12.345 is a floating-point number in base ten ...

8. PIC instruction listings - Wikipedia

   en.wikipedia.org/wiki/PIC_instruction_listings

   Add and subtract with carry, Decimal adjust after addition, for binary-coded decimal arithmetic, and; Read from program ROM, for table lookup. This uses TBHP and TBLP registers as a 16-bit pointer, fetches the word there, and stores the low byte in a specified location. The high 6–8 bits of the fetched word are stored in the TBLH register.

9. Addition - Wikipedia

   en.wikipedia.org/wiki/Addition

   Addition (usually signified by the plus symbol +) is one of the four basic operations of arithmetic, the other three being subtraction, multiplication and division. [ 2] The addition of two whole numbers results in the total amount or sum of those values combined. The example in the adjacent image shows two columns of three apples and two ...