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Bruno Conde
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Fixed README
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README.md

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@@ -5,13 +5,13 @@ Therefore, the plan is to build a very simple computer using one of these CPUs,
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I needed a way to flash the EEPROM.
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<p float="left">
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<img src="/assets/IMG_0759.jpg" alt="Arduino EEPROM programmer photo 1" width="200px" />
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<img src="/assets/IMG_0760.jpg" alt="Arduino EEPROM programmer photo 2" width="200px" />
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<img src="/assets/IMG_0759.jpg" alt="Arduino EEPROM programmer photo 1" width="40%" />
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<img src="/assets/IMG_0760.jpg" alt="Arduino EEPROM programmer photo 2" width="40%" />
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</p>
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# Description
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The goal of this project is to provide a way to flash a ROM file in an EEPROM chip using an Arduino Mega. The EEPROM chip that I'm using is the ![AT28C25615U from ATMEL](/assets/eeprom_AT28C25615U.pdf).
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The goal of this project is to provide a way to flash a ROM file in an EEPROM chip using an Arduino Mega. The EEPROM chip that I'm using is the [AT28C25615U from ATMEL](/assets/eeprom_AT28C25615U.pdf).
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I decided to use an Arduino shield with a ROM socket to flash a ROM file from my computer to the EEPROM.
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There is also a Python program to flash a ROM file using the Arduino serial port. I reckon I was too lazy to implement a protocol like xmodem to allow a program like "screen" to upload files directly to the Arduino without the need for an additional script.
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The Arduino program has the following options:
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1 - Read ROM
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2 - Write ROM
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3 - Read byte at address
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4 - Write byte to address
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5 - Erase ROM - 6502 NOP
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6 - Erase ROM
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1. Read ROM
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2. Write ROM
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3. Read byte at address
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4. Write byte to address
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5. Erase ROM - 6502 NOP
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6. Erase ROM
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This menu is displayed when the Arduino is connected using a serial interface (e.g. Arduino monitor, or using a tool like screen or putty).
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assets/IMG_0759.jpg

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