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ram rom selector

ram rom selector
These are example circuits targeted to 8-bits homebrew computers. They are simple circuits to select between ROM and RAM memories when they share partial block of address space, i.e. if you have a big ROM chip, let's say 32K but you won't use it every single cell of it. So you can set a ROM and a RAM chip on the same address space and set your computer to select the proper one.
Let me explain. Let's say that you have 1x 32K ROM chip and 2x 32K RAM chips and you're using a Z80. The Z80 needs ROM on the first page of the address space because at reset it points to $0000 address cell. But your firmware only occupies 16/18 KB of space. So you can build this RAM/ROM selector using simple chips from the 74xx series and let the computer switches between the 2 kinds of memory. In the first one, for example, the CPU reads from ROM chip up to address $4FFF (20,479), then reads/writes from/RAM. In the second one, the CPU addresses the ROM for the first 24K of memory then switches to RAM

project.name
1 Stars     219 Views

Digital Combinational Circuits

Digital Combinational Circuits

Digital Combinational Circuits

Gates: NOT,  AND, OR, NAND, NOR, XOR, XNOR

half adder, full adder, multiplexer, demultiplexer



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logic gates 1

logic gates 1

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dld lab 3

dld lab 3

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0 Stars     102 Views
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fuller adder

fuller adder

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0 Stars     123 Views

LOGIC GATES

LOGIC GATES

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laws of logic gates

laws of logic gates

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1 Stars     172 Views
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All Gates

All Gates

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0 Stars     138 Views

dlf

dlf

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0 Stars     60 Views
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exp 7

exp 7
or

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0 Stars     85 Views

OR Gate 3

OR Gate 3

More complicated setup


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0 Stars     155 Views

Complex Gate 1

Complex Gate 1

Deep Dive 1


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0 Stars     130 Views
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tamrin5 Q1

tamrin5 Q1

project.name
0 Stars     90 Views
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tamrin5 Q2

tamrin5 Q2

project.name
0 Stars     145 Views

Test1

Test1

Create Logic Gates and build Truth Tables


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0 Stars     150 Views

Complex Gate 2

Complex Gate 2

2.7 Complex Gates and Truth Tables


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0 Stars     108 Views

Complex Gate 3

Complex Gate 3

2.7 Complex gate with Truth Table


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0 Stars     150 Views

Complex Gate 4

Complex Gate 4

Complex Gates with Truth Tables


project.name
0 Stars     162 Views

Complex Gate 5

Complex Gate 5

Complex Gates


project.name
0 Stars     157 Views

test001

test001

test001


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0 Stars     143 Views

Test002

Test002

Test 002


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0 Stars     147 Views
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truth table of all gate

truth table of all gate

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0 Stars     101 Views
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Logis gates

Logis gates

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0 Stars     134 Views

Assignment 1

Assignment 1

Assignment 1 Lab 22-01-2020


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Basic Gates

Basic Gates

Simple Combinational Circuit using AND, OR, XOR, XNOR


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g=xy' +x'z' + x'y

g=xy' +x'z' + x'y

.


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h=(x'+y')(x+y+z')

h=(x'+y')(x+y+z')

.


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project4-1

project4-1

.


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COMPORTAS LÓGICAS

COMPORTAS LÓGICAS

Comportas lógicas anD/Ou, IFSP REGISTRO


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Experiment 1:Verifying truth table for gates

Experiment 1:Verifying truth table for gates

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E - TRÊS ENTRADAS

E - TRÊS ENTRADAS

3 ENTRADAS aND 


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OU - TRÊS ENTRADAS

OU - TRÊS ENTRADAS

OoR - TRÊS END


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COMPORTAS nOT, nOR, nAND E xOR

COMPORTAS nOT, nOR, nAND E xOR

AAAAA


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0 Stars     81 Views
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Verification of basic gates

Verification of basic gates

Verified the truth table of basic gates


project.name
0 Stars     88 Views
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trial

trial

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0 Stars     136 Views

Verification

Verification

project.name
0 Stars     133 Views

gates

gates

project.name
0 Stars     98 Views

logic gates

logic gates

project.name
0 Stars     117 Views

Study of logic gates

Study of logic gates

project.name
0 Stars     110 Views

logic gates

logic gates

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0 Stars     72 Views
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GATES

GATES

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0 Stars     134 Views
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basic circuit diagram

basic circuit diagram

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0 Stars     80 Views
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nor

nor

nothing


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0 Stars     59 Views

1st Project

1st Project

project.name
0 Stars     47 Views

01_basic gate

01_basic gate

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0 Stars     80 Views

full adder

full adder

project.name
0 Stars     75 Views

3-bit carry look-ahead adder

3-bit carry look-ahead adder

project.name
0 Stars     105 Views

Exemplo de portas lógicas

Exemplo de portas lógicas

Exemplos do funcionamento das portas lógicas básicas.


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0 Stars     96 Views

assignment2

assignment2

project.name
0 Stars     57 Views

assignment2

assignment2

project.name
0 Stars     75 Views

assignment3

assignment3

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0 Stars     104 Views
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project.name
0 Stars     47 Views

Untitled

Untitled

project.name
0 Stars     72 Views

full wave

full wave

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0 Stars     80 Views
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full and half

full and half

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0 Stars     76 Views
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half

half

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0 Stars     82 Views
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full

full

project.name
0 Stars     76 Views
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multiplexer

multiplexer

project.name
0 Stars     48 Views
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DEMULTIPLEXER

DEMULTIPLEXER

project.name
0 Stars     35 Views

full

full

project.name
0 Stars     36 Views

demultiplexef

demultiplexef

project.name
0 Stars     61 Views

myGATES

myGATES

project.name
0 Stars     64 Views

EXPERIMENT 0 Basic gates

EXPERIMENT 0 Basic gates

project.name
0 Stars     85 Views
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logic gate

logic gate

logic gate project


project.name
0 Stars     87 Views

study of logic gates

study of logic gates

project.name
0 Stars     76 Views

Logic gates

Logic gates

project.name
0 Stars     95 Views

homework

homework

project.name
0 Stars     33 Views

Experiment1

Experiment1

first experiment


project.name
0 Stars     37 Views

rekha

rekha

project.name
1 Stars     234 Views
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This is a simple digital clock with basic combinational and sequential logic circuits.

It can display seconds, minutes, and hours

Users can set time by clicking the button and using the multiplexer to choose which to change.

Also, the design for the 4bits 7segment display and 3 bits 7segment display is inside.


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gheevas project 1

gheevas project 1

project.name
0 Stars     49 Views

experiment 1 level 1

experiment 1 level 1

project.name
0 Stars     15 Views

Unlovi gatetitled

Unlovi gatetitled

project.name
0 Stars     24 Views

Logic gate

Logic gate

project.name
0 Stars     50 Views

LOGIC GATES

LOGIC GATES

project.name
0 Stars     30 Views

7 gates Implementation

7 gates Implementation

First lab of COA. 

Implementation and verification of logic gates

1.AND gate

2.OR gate

3.NOT gate

4.XOR gate

5.XNOR gate

6.NAND gate 

7.NOR gate


project.name
1 Stars     22 Views

shubham kumar

shubham kumar

project.name
0 Stars     47 Views

shubham verma

shubham verma

project.name
0 Stars     22 Views

team baka

team baka

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0 Stars     39 Views
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Untitled

Untitled

NAND gate only version for other gates


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0 Stars     14 Views

teste

teste
or

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0 Stars     14 Views

BASIC GATES

BASIC GATES

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0 Stars     6 Views
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class project

class project

project.name
0 Stars     29 Views
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two gate using not gate also class project

two gate using not gate also class project

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0 Stars     25 Views
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class project 3

class project 3

project.name
0 Stars     12 Views

Or gate test

Or gate test

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0 Stars     5 Views
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project1

project1

project.name
0 Stars     4 Views

11septlab

11septlab

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0 Stars     10 Views
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assignment 1

assignment 1

project.name
0 Stars     7 Views

Porta Lógica

Porta Lógica

O que são Portas Lógicas?

Portas lógicas são os blocos fundamentais da eletrônica digital, responsáveis pela realização das operações lógicas básicas que formam a base dos circuitos digitais. Elas recebem um ou mais sinais de entrada e produzem um sinal de saída, conforme uma lógica específica. As portas lógicas são essenciais em computadores, dispositivos eletrônicos e em diversas aplicações tecnológicas, pois são usadas para executar operações como soma, subtração, comparação, e outras funções lógicas necessárias para o funcionamento de sistemas digitais.

Cada porta lógica tem uma função definida e pode ser representada por um símbolo específico em diagramas elétricos. As operações realizadas por essas portas são baseadas nas leis da lógica matemática, particularmente na álgebra booleana, que permite a manipulação de variáveis binárias (0 e 1).


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Circuito 2 de 2

Circuito 2 de 2
or

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cIRCUITO CIBERNETICA 2

cIRCUITO CIBERNETICA 2
or

Josue Yael Torres Flores

512


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circuito 1 de dos

circuito 1 de dos
or

project.name
0 Stars     4 Views
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tarea cibernetica 4

tarea cibernetica 4
or

project.name
0 Stars     2 Views
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TAREA CIBERNETICA

TAREA CIBERNETICA
or