The system bus is made up of
System bus is a single computer bus that connects the major components of a computer system, combining the function of a data bus to carry information, an address bus to determine where it should be sent and a control bus to determine its operation.
A hardware interrupt is
An interrupt alert the processor to a high-priority condition requiring the interruption of current code the processor is executing. Hardware interrupt are generated by hardware devices, when something unusual happned also called external interrupt.
______ is a piece of hardware that executes a set of machine-language instructions.
Processor or processing unit is an electronic CKT which perform operations on some external source, usually memory or some data stream. Processor executes a set of machine language instructions.
To prevent signals, from colliding on the bus, _______ prioritize access to memory by I/O channels and processors.
To prevent signals from colliding on the bus, a controller prioritize access to memory by I/O channels and processors.
_______ improve system performance by temporarily storing data during transfers between devices or processes that operate at different speeds.
Buffers is a data area shared by hardware devices or program processes that operate at different speeds or with different sent of priorities.
Halt operation comes under ________ .
Halt operation comes under control transfer.
A bi-directional bus between a memory and CPU, possibly has three states. While the bus behaves like a open circuit, the output does not carry a signal in other state it carry signal in both direction. Which one of the following is 3rd state?
Three states of bi-directional bus is input data to RAM, output data to RAM and high impedance.
Horizontal microinstruction have which of the following attributes?
1. Short formats
2. Limited ability to express parallel micro operations.
3. Considerable encoding of the control information;
Horizontal micro instructions have following attributes:
1. Long formats.
2. Ability to express a high degree of parallelism .
3 . Little encoding of the control information.
Consider the following figure:
The above circuit represents____.
1. Hard-wired control unit
2. Micro programmed control unit
Since PLA is neither a hard-wired model nor a memory.
∴ We can say control unit with PLA as Hardwired or micro programmed control unit.
A microprogrammed control unit
A micro-programmed control unit facilitates easy implementation of new instructions than hardwired.