For the SIC/XE machine in brief explain the following in brief.A) Registers       B) Addressing Modes

A) Registers: In the SIC/XE machine, there are five registers, each of 24 bits. These are:

1. Accumulator (A): Used for arithmetic operations.
2. Index (X): Used for addressing.
3. Linkage (L): Used for jumping to new sections of the program.
4. Program Counter (PC): Holds the address of the next instruction to be executed.
5. Status Word (SW): Contains program status information.

B) Addressing Modes: SIC/XE machine supports five addressing modes:

1. Direct Addressing: The address part of the instruction directly contains the address of the operand.
2. Indirect Addressing: The address part of the instruction refers to the location where the actual address of the operand is stored.
3. Immediate Addressing: The operand is a part of the instruction itself.
4. Simple Addressing: The address part of the instruction is assumed to be the address of the operand.
5. Relative Addressing: The address is specified relative to the current value of the program counter or the base register.