1. Arithmetic logic unit (ALU)
2. Accumulator A, B registers, temporary registers
3. Program status word (PSW): C AC FO RS1 RS0 OV - P
4. Decimal adjustment circuit, Boolean processor
Their functions include:
addition, subtraction, multiplication, division Arithmetic operations
Add 1, subtraction 1 operation
Decimal adjustment
bit operation Set 1, clear 0, invert
AND, OR, XOR and other logical operations
Data transfer operation
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