The ALSTOM MPIB100G 3BEE0226 is a control module produced by the French company Alstom. It is used in a variety of Alstom railway equipment, including electric locomotives, EMUs, urban rail trains, etc.
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The basic idea of microprogram control (referred to as microcode control) is to generate microoperation commands with microinstructions, and the function of an instruction is completed by performing a series of basic operations, which are called micro operations
Each microoperation is performed under the control of the corresponding control signals, which are called microcommands in microprogramming. A microprogram is an example of a microinstruction that corresponds to the work of a machine instruction
Yes, each microinstruction is a 0/1 column containing a microcommand that performs a basic operation or transfer function, sometimes referred to as a microinstruction word, called a controlword. [2]
The composition of the microprogram controller: 1, the Control Memory (Control Memory) Lai stores the corresponding microprogram of each machine instruction. An entry point used by a decoder to form microprograms corresponding to machine instructions
Address. When each microinstruction of the microprogram corresponding to the machine instruction is extracted one by one and sent to the microinstruction register, the microoperation command is issued according to the prior design, and the machine is completed
Function of machine instruction. This is true for every machine instruction. 2, the width of the microinstruction directly determines the width of the microprogram controller. In order to simplify the control memory, some measures can be taken to shorten the microfinger
The width of the order. For example, the field decoding method is used for one-level segmentation decoding. Obviously, the control field of the microinstruction will be greatly shortened. Some microoperation commands to be generated at the same time cannot be arranged in the same word. for
The control field can be shortened by step, and the field decoding can be designed to be two or multiple levels. The CPU controller is the component that directs the various components of the computer to work in coordination according to the functional requirements of the instruction, the computer
The nerve center and command center consists of the InstructionRegister (IR), the ProgramCounter (PC), and the operation controller OC
(OperationController) consists of three parts, which is extremely important for coordinating the orderly work of the entire computer. Register: A register that holds the instructions currently executed or to be executed. Refers to the
Contains an opcode that determines the type of operation and an address that indicates the source or destination of the operand. Instruction length varies from computer to computer, and the length of the cold register also varies. All operations of the computer
They are executed by analyzing the instructions stored in the instruction register. The input side of the instruction register receives instructions from the memory, and the output side of the instruction register is divided into two parts. Part of the operation code is sent
The decoding circuit is analyzed to indicate what type of operation this instruction should perform: the address part is sent to the address adder to generate a valid address and then sent to the memory as the address of the fetch or store. memorizer
Can refer to the main memory, cache, or register stack used to hold the currently executing instruction. When an instruction is executed, it is first read from within to the Data register (DR) and then transferred
To R. Instructions are divided into operation code and address code fields, which are composed of decimal numbers. In order to execute any given instruction, the opcode must be tested in order to identify the required operation. Instruction decoding
That's what the machine does. The output of the opcode field in the register is the input of the instruction decoder. Operation code - After decoding, a specific signal of the specific operation can be sent to the operation controller.
Program counter: A counter that indicates the address of the instruction to be executed next in the program, also known as the instruction counter. It has the function of instruction address register and counter. When the - instruction has been executed
When the program counter is used as an instruction address register, the period capacity must be changed to the address of the next instruction, so that the program can continue to run.
