Ral 8085 In C

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8085

Instruction Set of Intel 8085 Microprocessor An Instruction is a command given to the computer to perform a specified operation on given data. The instruction set of a microprocessor is the collection of the instructions that the microprocessor is designed to execute.

Ral 8085 In C R

  • RAL Design Range Colour Chart. The colours depicted on the following chart are for guidance only. The displayed colour will depend on your monitor and browser and pearl or metallic colours cannot be shown adequately. The finished colour, therefore, may not be as shown here.
  • The 8085 addressing modes are classified into following types: In this mode operand is a part of the instruction itself is known as Immediate Addressing mode. If the immediate data is 8-bit, the instruction will be of two bytes. If the immediate data is 16 bit, the instruction is of 3 bytes.

The following table shows the list of Logical instructions with their meanings.

ROTATE is a logical operation of 8085 microprocessor. It is a 1 byte instruction. This instruction does not require any operand after the opcode. It operates the content of accumulator and the result is also stored in the accumulator. The Rotate instruction is used to rotating the bits of accumulator.Types of ROTATE Instruction:There are 4 categories of the ROTATE instruction: Rotate accumulator left (RLC), Rotate accumulator left through carry (RAL), Rotate accumulator right (RRC), Rotate accumulator right through carry (RAR). Among these four instructions; two are for rotating left and two are for rotating right. All of them are explain briefly in the following sections:.

Rotate accumulator left (RLC) –In this instruction, each bit is shifted to the adjacent left position. Bit D7 becomes D0.

Carry flag CY is modified according to the bit D7. For example:- A = D7 D6 D5 D4 D3 D2 D2 D0//before the instructionA = 10101010; CY=0//after 1st RLCA = 01010101; CY=1//after 2nd RLCA = 10101010; CY=0. Rotate accumulator left through carry (RAL) –In this instruction, each bit is shifted to the adjacent left position. Halo 3 odst corrupt cop. Bit D7 becomes the carry bit and the carry bit is shifted into D0. Carry flag CY is modified according to the bit D7. For example: A = D7 D6 D5 D4 D3 D2 D2 D0//before the instructionA = 10101010; CY=0//after 1st RALA = 01010100; CY=1//after 2nd RALA = 10101001; CY=0. Rotate accumulator right (RRC) –In this instruction, each bit is shifted to the adjacent right position.

Ral Command In 8085

Bit D0 becomes D7. Carry flag CY is modified according to the bit D0. For example: A = D7 D6 D5 D4 D3 D2 D2 D0//before the instructionA = 10000001; CY=0//after 1st RRCA = 11000000; CY=1//after 2nd RRCA = 01100000; CY=0.

Rotate accumulator right through carry (RAR) –In this instruction, each bit is shifted to the adjacent right position. Bit D0 becomes the carry bit and the carry bit is shifted into D7. Carry flag CY is modified according to the bit D0.

For example: A = D7 D6 D5 D4 D3 D2 D2 D0//before the instructionA = 10000001; CY=0//after 1st RARA = 01000000; CY=1//after 2nd RARA = 10100000; CY=0Applications of ROTATE Instructions:The ROTATE instructions are primarily used in arithmetic multiply and divide operations and for serial data transfer. For example: If A is 0000 1000 = 08H1. By rotating 08H right: A = 0000 0100 = 04HThis is equivalent to dividing by 2.2. By rotating 08H left: A = 0001 0000 = 10HThis is equivalent to multiplying by 2.However, these procedures are invalid when logic 1 is rotated left from D7 to D0 or vice versa.

For example, if 80H is rotated left it becomes 01H.