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8-bit RISC based CPU by Mind Map: 8-bit RISC based CPU
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8-bit RISC based CPU

Instruction Decoder

FETCH/INCREMENT

ALU

SETAB

MOV_ALU_IN

ALU

MOV_ALU_OUT

MOV

MOV

MOV16

Memory Access

LOAD

STORE

Flags

STORE_FLAGS

LOAD_FLAGS

SAVE_FLAGS

RESTORE_FLAGS

FLAGS_TO_OUTBUFFER

INBUFFER_TO_FLAGS

Jumps

JMP

JZ

JNS

JNC

JNZ

16BIT_ADDER

IO

IN

OUT

HLT

General Purpose Registers

8-bit Register

D

E

F

G

H

XL

XH

XE

16-bit Register

M

X

J

SP

BP

PC

INC

Y

Z

Timer

NE555

Ripple Counter

3-to-8 Decoder

Stop Circuit

8-bit ALU

Interface

Input A

Input B

Output C

Internal A

Operations

NOP

XOR

OR

AND

ADD

NOT

SHL

ADC

SUB

NEG

SBB

RCL

SHR

SAR

RCR

MOV8

System Buses

8-bit Data Bus

16-bit Address Bus

Flags Bus

SRAM Memory

I/O Ports

Input Port A

Input Port B

Output Port C

Output Port D