What do you mean by program status word?
The program status word (PSW) is a register that performs the function of a status register and program counter, and sometimes more. The term is also applied to a copy of the PSW in storage.
What is the use of program status word?
The Program Status Word (PSW) contains status bits that reflect the current CPU state. The 8051 variants provide one special function register called PSW with this status information.
What is the bit 0 of program status word?
It is 1 when in ESA/390 mode and 0 when in z/Architecture® mode. Indicates whether your z/VM system is in a wait state. If this bit is set to 0, your system is not in the wait state, and processing can proceed normally. If this bit is set to 1, your system is in a wait state.
What are the program status word of 8086?
The current state of processor is stored in a register called Processor Status Word (PSW). The PSW contains bits which indicate such things as whether the previous arithmetic operation produced a positive, negative or zero result. The 8086 microprocessor has 16-bit PSW.
What is full form of PSW?
PSW – Personal Support Worker.
How many bits are unused in PSW?
two unused bits
The program status word (PSW) register is an 8-bit register, also known as flag register. It is of 8-bit wide but only 6-bit of it is used. The two unused bits are user-defined flags.
Why flag is also called PSW?
Like any other microprocessor, the 8051 has a flag register to indicate arithmetic conditions such as the carry bit. The flag register in the 8051 is called the program status word (PSW) register.
What is program status word and what part does it play in computer system?
The Program Status Word or PSW is a collection of data 8 bytes (or 64 bits) long, maintained by the operating system. It keeps track of the current state of the system. When an ABEND does occur, ASSIST will print out various information for us including the PSW. …
What is PSW in Canada?
Personal support workers (PSWs) care for people who are ill, elderly or need help with daily tasks. You make sure your clients are comfortable, safe and enjoy emotional and physical well-being. You may work for a long-term care facility or in your clients’ homes as an employee of a home care agency.
What is quality PSW?
Definition of Part Submission Warrant (PSW): A procedure by which the supplier of a part or subsystem gives evidence to the customer that he is able to satisfy the requirements of Delivery date, Quality, Process Capability and Production Rate.
What is the standard form of PSW?
The Full form of PSW is Process Status Word, or PSW stands for Process Status Word, or the full name of given abbreviation is Process Status Word.
How big is the program status word ( PSW ) register?
The program status word (PSW) register is an 8-bit register.It is also referred to as the flag register. Although the PSW register is 8 bits wide, only 6 bits of it are used by the 8051.The two unused bits are user-definable flags.
What is the function of the program status word?
The program status word (PSW) is a register that performs the function of a status register and program counter, and sometimes more. The term is also applied to a copy of the PSW in storage.
Where do I find the program status information?
The information is held in the program status register, and usually contains the value of the program counter and bits indicating the status of various conditions in the ALU such as overflow and carry, along with the information on supervisor privileged status.
What does the PSW register do on the 8051?
Although the PSW register is 8 bits wide, only 6 bits of it are used by the 8051.The two unused bits are user-definable flags. Four of the flags are called conditional flags, meaning that they indicate some conditions that result after an instruction is executed.