rock65

A homebrew breadboard computer based on the W65C02S chip alongside a freeware library.

Summary of Components

Component	Description	Link
W65C02S	Processor	Mouser.ca
24FC1026 EEPROM	125 Kb EEPROM	Mouser.ca
23LCV1024	125 Kb SRAM	Mouser.ca
7805 Regulator	5V Voltage Regulator	Seli.tn
4MHz Quartz Oscillator	4 Mhz Crystal Oscillator	Seli.tn
74HC00 NAND Gate	Quad 2-input NAND gate	Seli.tn
PCF8574T I2C Module	I2C I/O Expander	Seli.tn
128x64 LCD Display	LCD Display	Seli.tn
RTC DS3231	Real Time Clock	Seli.tn
Button		Seli.tn
Info LED	Indicator	Seli.tn
10kOHM Resistor	Resistance	Seli.tn
220 Ohm Resistor	LED Resistance	Seli.tn
10 µF capacitor	Electrolyte Capacitor	Seli.tn
M/M Jumper Wire		Seli.tn
M/F Jumper Wire		Seli.tn
9V Battery Connector	Battery Connector	Seli.tn

Hardware

Important

This project is currently under development. The components and chips have not been purchased yet.

This is the electric diagram :

graph TD;
    A[Alimentation] -->|9V - 12V| B[LM317 / 7805]
    B -->|5V Régulé| C[Alim. Bus]
    
    C -->|5V| D[W65C02S CPU]
    C -->|5V| E[W27C512 EEPROM]
    C -->|5V| F[PCF8574T I2C Expander]
    C -->|5V| G[DS3231 RTC]
    C -->|5V| H[128x64 LCD]
    C -->|5V| I[SD Card Module]
    C -->|5V| J[74HC00 NAND Gate]
    C -->|5V| K[Buttons]
    C -->|5V| L[LEDs]
    
    D -->|Addr/Data Bus| E
    D -->|I2C| F
    F -->|I2C| G
    F -->|I2C| H
    F -->|I2C| I
    
    E -->|Firmware Storage| D
    I -->|Program Read| D

    subgraph Power Regulation
        B
    end
    
    subgraph Processing
        D
    end
    
    subgraph Storage
        E
        I
    end
    
    subgraph Peripherals
        F
        G
        H
        J
        K
        L
    end

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Manual

Refer to the Developer Manual for information, including the datasheet, development guidelines and additional tips.