- #27c801 eprom programmer arduino mod
- #27c801 eprom programmer arduino serial
- #27c801 eprom programmer arduino software
- #27c801 eprom programmer arduino Bluetooth
Aí, fiz uma aplicaçãozinha tosca de Android, que recebia estes dados via Bluetooth.
#27c801 eprom programmer arduino Bluetooth
Fiz depois uma adaptação, colocando um módulo bluetooth no Arduino. Fiz uma aplicação mequetréfia para pegar estes dados e recompilar estes no PC. Com dois push buttons, seleciona-se quaisquer arquivos de interesse do usuário e, se decompila este mesmo arquivo em um array de bytes. Usa um módulo SD Card, mais um display LCD. Creio que você deva estar ocupado, portanto, entenderei se você não puder esclarecer.ġ- Posso usar uma EEPROM Winbond W27c512, 512Kb,16 áreas endereçáveis(alterando isto em sua Skecth que tem 20), para gravar jogos de Master System (Sem Memory Mappers) de 8Kb até 32Kb?Ģ – Posso fazer tudo o que escrevi na questão anterior, com a mesma EEPROM, para gravar games de Atari 2600(ainda que a questão do Bank Switching, me deixe intrigado)?ģ – Tem um tempo que não mexo com Arduino, mas, eu tenho uma Sketch aqui, que manipula dados do Cartão SD. Tudo tranquilo? em primeira instância, parabéns! que projeto bom. We can talk on fb messenger, telegram or email, whichever is fine. Supposed content: (not actual data, just example to explain the problem)Ĭould you (or on that matter, anyone) help me out? I can’t pinpoint the problem. When viewing it in hexeditor, the first line is identical to the content, but the second line is the same as the first. Now when I read a 2732 eprom with known contents,I DO actually get data so the board is OK, but :
#27c801 eprom programmer arduino mod
I did not mod the py code so far, thought setting the eprom size to 4k would be ok. Changed the arduino code to have only the 12 address pins with the correct pin in the code.
This specific eprom doesn’t require 6v, just 21v on the vpp pin, which I`ve done already. I have modified the design and the code accordingly, with partial success. I am working on a programmer specifically for the 2732 EPROM (yeah, 4k, but I need this specific eprom for an old commodore cartdidge restoration). Sooo… I needed to make changes to the arduino code but still have problems.
#27c801 eprom programmer arduino serial
A Python script reads the data from a file and sends over serial to the Arduino Mega, which receives the data and writes in memory, all very simple.
#27c801 eprom programmer arduino software
I used a boost so everything is powered by USB.ĮPROM burner shield (Incomplete, still lacked the transistors)Ĭool, but in this case, hardware without software is nothing. The 13 volts are provided by a boost module, but possibly a 12 volt supply can be used (I did not test, may be you can ). This makes it eadsy to attach and remove the Eprom.
I soldered the circuit on a prototyping shield with a ZIF socket. I used a simple jumper and manually change Vcc when needed. Schematic for the EPROM burner with Arduino.Īlso, it should be noted the Eprom needs to be fed 6V when being programmed. However, I did not buy an Arduino only to program memories, I have some here at home I use to all kinds of things.īelow is a schematic I came up with for the programmer:
Why not also try EPROMs? Also, Arduinos are super cheap (Ebay/Ali express). I’ve used Arduino to program other kinds of memory. More information can be found on the 27C801 eprom d atasheet. The problem is just to do this for 8 * 1024 * 1024 = 8388608 addresses. To write a byte in EPROM simply select the address via pins A0, A1, A2 … and so on put the byte to be written in Q0 pins, Q1, Q2 … etc, and give a pulse with a high voltage ( 13V) in the Vpp pin. And it’s actually even easier to program than flash memories. Write flash memory is not trivial, there is a certain algorithm, but still is a relatively simple process. In 2014, I fixed Mega Drive cartridge using a BIOS chips found in scrap. Even the Chinese ones (It actually depends on the place, here you can pay overpriced from some scumbag or try to import and probably be taxed).Įverything has a cost-benefit ratio and Makers/Hackers are always creating super useful tools with cheap materials. Okay, but then why is not everyone making their own repros? Because a programmer is not so cheap.