Simple Computer

This is the design and implementation of a simple computer by using quartus II 9.0 and Cyclone II EP2C8T144C8.

Registers

Symbol	Bits	Name	Function
MAR	8	Address Storage Register	Store address of intructions
MBR	8	Digits Storage Register	Store the digits of address in RAM
A	8	Register A	A register
B	8	Register B	B register
R	8	Register R	R register
PC	8	Program Counter	Store address
IR	8	Instructions Register	Store the intruction opcode
T	8	Timing Counter	Generate Timing Signals

General Overview

Instructions

Opcode	Mnemonic	QI	Function
0000 0000	LDA ADDR	q1	Put the content of address ADDR into A
0000 0001	STA ADDR	q2	Put A into the content of address ADDR
0000 0010	ADD A, B	q3	Add A and B, and then put into A
0000 0011	SUB A, B	q4	A substract B, and then put into A
0000 0100	ADD A, B	q5	Logic process A&&B, and then put into A
0000 0101	OR A, B	q6	Logic process AorB, and then put into A
0000 0110	MOV, A, R	q7	Put the content of R into A
0000 0111	MOC A, R	q8	Put the content of R into B
0000 1000	LDI A, OPRD	q9	Put the oprands into A
0000 1001	LDC B, OPRD	q10	Put the oprands into B

Test Repo

Address	Content	Description
0000 0000	0000 0110	Put the content of R into A
0000 0001	0000 1001	Put the oprands of the following address into B
0000 0010	0000 1110	oprands -- 0000 1110
0000 0011	0000 0010	add A and B, then put into A
0000 0100	0000 0111	Put the content of R into B
0000 0101	0000 1000	Put the oprands of the following address into A
0000 0110	0011 1111	oprands -- 0011 1111
0000 0111	0000 0011	A substract B and then put into A
0000 1000	0000 1000	Put the oprands of the following address into A
0000 1001	0000 1010	oprands -- 0000 1010
0000 1010	0000 1001	Put hte oprands of the following address into B
0000 1011	0000 0011	oprand -- 0000 0011
0000 1100	0000 0100	logic process A&&B, and then put into A
0000 1101	0000 1001	Put the oprand of the following addresss into B
0000 1110	0000 0101	oprand -- 0000 1001
0000 1111	0000 0101	logic process AorB, and then put into A

Expected Results:

a). 00010101        
b). 00010001       
c). 00111111                 
d). 00101010                     
e). 00001010                
f). 00000010                
g). 00000111                

More information and details can be seen at our report