In case someone is interested in doing a programmer with an Arduino Uno and I/O expanders: schematic on my site.

I haven't found the time to breadboard it fully yet. I've been playing around with the KIM Uno replica kit..

How long does it take for this programmer take to program an 8k rom?
my current setup takes a couple of minutes because it's not fast enough to do page writes :/

...

I'm using the MCP23017 to program mine, but that's simply because I started out programming mine with my Raspberry Pi and had ...

Nice to see that people are still working on this. I'm starting to pick this project up again; I'm making a simpler (?) design with an MCP23008 I/O expander for the data bus, an MCP23017 I/O expander for the address bus and Arduino digital pins for the control logic. I'm playing around with the ...

I'm looking for ideas how to make a video interface for a 6502 system. [...] One is no video interface but just a UART to communicate with the 6502 system.[...]

I was thinking of using Grant Searle's Monitor/Keyboard interface, that uses two AVR on a separate board that communicates with the CPU ...

At the least, you should invest in a good logic probe. If your finances allow it, a 'scope is often a big help in figuring out why something doesn't work.

Thanks for the tip! A 'scope is a bit out of my price range for the occasional hobby projects, and I don't really have room for one either ...

Do you have suitable test equipment to monitor the EEPROM pins to see what's going on?

I have a multimeter that I try to use to debug, but it doesn't feel like a very good method...

Also, are you confident about your timing?

I was concerned that my write cycles were too short; I added some ...

First, welcome to our 6502 world.
Thanks!
None are jumping out at me at this time. It's probably safe to say that it won't smoke on the first power application. The work will be in programming your firmware. Please keep us posted on your progress.
I've got everything wired up, and it didn't ...

Hi,

I've been working on a 28C64 programmer using the Arduino Uno, based around a simple counter and the MCP23008 I/O extender.

Maybe it's of interest to someone? You can read about it here: http://tobier.se/eeprog/

I've got everything wired on my breadboard, but I haven't finished the firmware ...