Explain hit slice processor.

Bit slicing is a technique for constructing a processor from modules of smaller bit width. Each of these components processes one bit field or “slice” of an operand. The grouped processing components would then have the capability to process the chosen full word-length of a particular software design.

In a bit-sliced processor each module contains an ALU (arithmetic-logic unit) usually capable of handling a 4-bit field. By combining two or more identical modules it is possible to build a processor that can handle any multiple of this value, such as 8 bits, 12 bits 16 bits, 20 bits, and so on.

Bit slice micro processor divide the element of a central processing unit among several ICs.

Bit slice processors usually consist of an arithmetic logic unit (ALU) of 1, 2, 4 or 8 bits and control lines (including carry or overflow signals that are internal to the processor in non-bit sliced designs).

A micro sequencer or Control ROM would be used to execute logic to provide data and control signals to regulate function of the component ALUs.

Examples of bit-slice microprocessor modules can be seen in the Intel 3000 family, the AMD Am2900 family the National Semiconductor IMP-16 and IMP-8 family, and the 74181.

(i) Data buses and register files of the individual slices are effectively juxtaposed to increase their size.

(ii) The control lines select and sequence the operation to be performed.

(iii) Each slice thus performed same operation on different operand.