The document summarizes the LadyBug II CPU implementation including its 16-bit RISC instruction set and registers. The instruction set supports basic logic, arithmetic, and shift operations on registers A and B with output stored in register C or the carry register. It has been updated from a previous version with an expanded instruction set.
A demultiplexer has N control inputs that determine which of its 2N outputs receives the single data input. It performs the opposite function of a multiplexer by routing the data input to the selected output based on the control input values. Demultiplexers are used to distribute a data signal to multiple outputs based on a select code.
This document describes how to implement a full adder and full subtractor using an 8:1 multiplexer. It provides the theory of multiplexers, truth tables for full adders and full subtractors, and circuit diagrams showing how to connect the components. The procedure explains how to check components, insert the IC, make connections, provide inputs, and observe the outputs on LEDs to verify the circuits. The goal is to design full adders and full subtractors using an 8:1 multiplexer.
The ratios of the length and width of the table tennis court are not proportional because their ratios are different - the length is 26:3 and the width is 26:5. The document provides sources for table tennis court dimensions from Wikipedia and an expert tennis tips website.
Il sindaco di Pescantina, Luigi Cadura, ha presentato alla Direzione Provinciale del PD Verona la relazione sullo stato del progetto messo in atto dall’Amministrazione Comunale per la soluzione del problema della bonifica del sito di Ca’ Filippine
The document summarizes several chapters from a history textbook about colonial America. It discusses the Glorious Revolution in England and its effects on the colonies. It also describes the growth of trade between the colonies and England, as well as population growth and religious revivals in the colonies. Further, it discusses the acquisition of horses and guns by Native American tribes and the resulting changes to warfare and nomadic lifestyles. Finally, it outlines several Native American rebellions against colonial expansion and the Russian conquest of the Aleutian Islands.
A demultiplexer has N control inputs that determine which of its 2N outputs receives the single data input. It performs the opposite function of a multiplexer by routing the data input to the selected output based on the control input values. Demultiplexers are used to distribute a data signal to multiple outputs based on a select code.
This document describes how to implement a full adder and full subtractor using an 8:1 multiplexer. It provides the theory of multiplexers, truth tables for full adders and full subtractors, and circuit diagrams showing how to connect the components. The procedure explains how to check components, insert the IC, make connections, provide inputs, and observe the outputs on LEDs to verify the circuits. The goal is to design full adders and full subtractors using an 8:1 multiplexer.
The ratios of the length and width of the table tennis court are not proportional because their ratios are different - the length is 26:3 and the width is 26:5. The document provides sources for table tennis court dimensions from Wikipedia and an expert tennis tips website.
Il sindaco di Pescantina, Luigi Cadura, ha presentato alla Direzione Provinciale del PD Verona la relazione sullo stato del progetto messo in atto dall’Amministrazione Comunale per la soluzione del problema della bonifica del sito di Ca’ Filippine
The document summarizes several chapters from a history textbook about colonial America. It discusses the Glorious Revolution in England and its effects on the colonies. It also describes the growth of trade between the colonies and England, as well as population growth and religious revivals in the colonies. Further, it discusses the acquisition of horses and guns by Native American tribes and the resulting changes to warfare and nomadic lifestyles. Finally, it outlines several Native American rebellions against colonial expansion and the Russian conquest of the Aleutian Islands.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise stimulates the production of endorphins in the brain which elevate mood and reduce stress levels.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise stimulates the production of endorphins in the brain which elevate mood and reduce stress levels.
1. Implementation of LadyBug CPU
Name : LadyBug II
Website : http://ladybugsystems.ir
Version : Second Implementation with bigger instruction set, previous implementation is available
on our website.
Instruction Set
Word size : 16 bit
Type : RISC
Code Operation Description
0000 NOT A, B Does bitwise NOT on A and B,
we can choose one them using a
mux.
0001 NEG A, B Makes 2’s complement of A and
B, we can choose one of them
using a mux.
0010 AND A, B Does bitwise AND on A and B.
0011 OR A, B Does bitwise OR on A and B
0100 ADD A, B Adds B to A
0101 SUB A, B Subtracts B from A
0110 SHLA, B Shifts A or B to left, we can
choose one of them using a
mux*.
0111 SHR A, B Shifts A or B to right, we can
choose one of them using a
mux*.
1000 MUL A, B Multiplies A and B.
1001 DIV A, B Division, A/B.
Registers
Register Description
A 16 bit input register
B 16 bit input register
C 16 bit output register
Carry register 16 bit output register, keeps carry of DIV or
MUL operations.
2. Register Instruction
Code Operation Description
1010 MOV B, A Moves value of A to B
1011 MOV A, B Moves value of B to A
1100 MOV A, C Moves value of C to A
1101 MOV A, Carry Moves value of Carry to A
NOTES:
*. As Shift is a unary operation, like NOT and NEG, we decided to use a multiplexer to choose
inputs of shifters.
Step by Step Implementation
1. ALU: