I ask patience to help me to have clarity because I tend to equivocate between formal rappresentation like
like operator is a token
it is determined which operation is to be performed and how to get the operands, according to a function whose domain consists...
and what is physically-electronic-logic rappresentation CPU elements operation like
CPU configuration signal Registers pulses
about some with respect to certain specific technical processes. The cause is related to mixing high bit, operator, operand when it working like functions.
I don't what mean for 'value' - what is this 'value' ? A logic state, adressing mode? i don't understand why operands may as a constant value
Often, one group of bits (that is, a "field") within the instruction, called the opcode, indicates which operation is to be performed, while the remaining fields usually provide supplemental information required for the operation, such as the operands. Those operands may be pecified as a constant value
What it mean 'pulses' ? I don't understand well the connection of bit like rappresentation and its physical state version. This pulses are generated about what electronic component ?
the control unit produces the sequence of pulses on each control signal line required to implement that instruction
I really don't understand if this functions are math or logic states about operand assembly (decode).
Operand Assembly: once the word has been taken from memory, it is determined which operation is to be performed and how to get the operands, according to a function whose domain consists of the operating codes (typically the high order bits of the word) and the co-domain consists of the microprogram to be executed
But..as these functions are generated to get the addresses from which electronic element ? Registers ? Addressing Mode ? I don't understand if it refers about instruction sets, a part of the architecture or if one process?
I don't understand well this electronic logic passage. Hardwired ? Multiple clock pulses ? Is there some link to understand better this ?
In some CPU designs the instruction decoder is implemented as a hardwired, unchangeable circuit. In others, a microprogram is used to translate instructions into sets of CPU configuration signals that are applied sequentially over multiple clock pulses. In some cases the memory that stores the microprogram is rewritable, making it possible to change the way in which the CPU decodes instructions.
what is configuration signals physically-logic ?
is used to translate instructions into sets of CPU configuration signals
But it is done by the ALU or not?
I don't understand Microcode
The microcode is a layer of hardware-level instructions that implement higher-level machine code instructions or internal state machine sequencing in many digital processing elements
Operand: numerical data on which the product is an arithmetic or logic
I understand mean of high-order bit and high word http://www.gamedev.net/topic/414290-please-explain-high-and-low-order-bitword-terminology/
I understand what is word http://whatis.techtarget.com/definition/word
and is ok also operand definition (wiki) but I don't understand WHAT THEY ARE like LOGIC_PHYSICALLY ? How they are made to logical-physical level?
I don't understand why defined bit length of a word is equivalent to the width of the computer's data bus so that a word can be moved in a single operation from storage to a processor register.