Differences between SAP-1 and SAP-2 Architecture

SAP-1	SAP-2
It has 8-bit bus.	It has 16-bit bus.
PC is 4-bit.	PC is 16-bit.
It does not have hexadecimal keyboard encoder.	It has hexadecimal keyboard encoder.
It has single input.	It has two input ports.
MAR receives 4-bit address from PC.	MAR receives 16-bit address from PC.
It does not have ROM.	It has 2 KB ROM.
It has 16 Byte memory.	It has 62 KB memory.
It does not have MDR.	It has MDR.
It has only adder/subtractor.	It has ALU.
It does not have flag.	It has 2 flags.
It does not have temporary register.	It has temporary register.
It has single register (B).	It has 2 registers (B and C).
It has single output port.	It has 2 output ports.
It has 5 instruction sets.	It has 42 instruction sets.