Status register

Status register

A status register is a type of register found in a processor that stores the status of various flags. The register is made up of individual bits, each representing the status of a specific flag. The purpose of a status register is to provide information about the state of the system, including parity or system error reporting, abort interrupt status, indication of a Command List, and/or the presence of an interrupt request from a device.From: Dictionary of Computer Science, Engineering, and Technology [2017], The Essential Guide to Serial ATA and SATA Express [2019]

Machine Arithmetic

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Published in Julio Sanchez, Maria P. Canton, Software Solutions for Engineers and Scientists, 2018

Julio Sanchez, Maria P. Canton

All 80x86 CPUs are equipped with a special register that reflects the current status of the microprocessor. This register has been called the status word, the Status register, the Flags register, and the E flags register. The status register contains bits that are meaningful during the execution of logic and arithmetic operations. These bits sometimes called flags. Figure 3.1 shows the structure of the Status register as well as the name and position of the status bits or flags.

Synthesis of programmable biological central processing system

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Published in Journal of the Chinese Institute of Engineers, 2021

Wei-Xian Li, Jiangfeng Cheng, Chun-Liang Lin, Chia-Feng Juang

A biological status register, or condition code register, is a collection of status flag bits for the Bio-CPU. The decision function indicates a specific condition that must be fulfilled when the bit of the status register is processed. The instruction address will then be JUMP with a specific instruction address. The condition is determined by referencing the Bio-ALU output state. One condition is that when the protein state in the Bio-ALU causes the Carry-output to be high, the system must have a CARRY status. Another condition is that when all output states in the Bio-ALU are at the low state, the system must have the condition of ZERO. We coordinate the enable commands and the biological registers to retain bit status, which can be utilized to trigger the opcodes of JUMPC, JUMPNC, JUMPZ, and JUMPNZ.

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Machine Arithmetic

Synthesis of programmable biological central processing system