A basic computer uses many register for different purpose. I have list a them here, but you may find detailed information in any Computer Architecture Books.
|LIST OF REGISTERS IN A BASIC COMPUTER|
Source : Computer Architecture by Morris Mano
DR – The data register holds the operand read from memory.
AC – The accumulator register is a general purpose processing register.
IR – Instruction from memory is placed in IR.
PC – It holds the address of next instruction.
TR – It holds the temporary data during processing of data.
AR – Holds address in 12 bit for operand.
|REGISTER ORGANIZATION IN A COMPUTER|
SOURCE: COMPUTER ARCHITECTURE BY MORRIS MANO