Tapuino, the $20 C64 Tape Emulator

[stephenfalken]

The SD card adaptor that I used had an LED on the board with it, you could probably tap into the tracks of that if you used a similar one and hook it to another LED, provided there was enough juice!

[ozayturay]

I will try to drive two leds (green for read, red for write) with transistors from the read and write signals. I'll let you know if i succeed.

[Quagliarulo]

Hello, I'd like to build this circuit using a bare ATmega328p microcontroller instead of an Arduino. I already got the binary file and drew a proper schematic.
My only concern is the absence of the serial-to-USB interface chip. The firmware tries to write to the UART, but will it still work if it doesn't get any answer from it?

[Merlin]

Would you be able to program the ATmega via a JTAG interface?

[Quagliarulo]

Would you be able to program the ATmega via a JTAG interface?

I don't have the equipment for that. I usually use a parallel port ICSP adapter and/or a USB bootloader based on V-USB.

[Quagliarulo]

It looks like all serial accesses are commented out in the sources, so it should work. I'll let you know when I get all the bits. If it works and anyone is interested, I'll also share my schematic diagram.

[sweetlilmre]

Hi, yes the serial access was primarily for debugging purposes and has been removed as the code matured and more space was required for functionally.

I would suggest ICSP. I'm unfamiliar with the size of the vusb bootloader, but the code is close to 328p capacity. Alternatively the AVR studio project files should be in the source now and building with that system reduces code size nicely.

Apologies for the late reply on this, somehow I didn't get the notification. Please let me know how you get on and if I can assist.

[Quagliarulo]

Thank you sweetlilmre, you're very kind and helpful!

[spcbm]

I was on a retro event in Barcelona (Spain) last month, RetroBarcelona 2014.

With Bieno from Commodore plus, and showing my Tapuino with info about the project.
I finished fitting the Tapuino in the black plastic enclosure just the day before the event.

It will be nice to design a PCB to make the assembly easier, if some people is interested I can try to make.
I was trying to post some links but the post is lost??? So I put some pictures:

[sweetlilmre]

Wow! I'm just blown away... Fantastic build and thanks for sharing the pics and the Tapuino with others!

I'm in the process of getting a board made at the moment and have a design that I can share with you. I'll put the Eagle files up on github tomorrow.

Again... Wow I would have loved to have been there to see your display in person.

-(e)