Was there any particular reason for moving some of the signals that already existed on the RC6502 bus, or was it just something you weren't bothered to try to match up? (I ask in case there's anything you came across that we should be considering when tweaking the RC6502 bus.)

Sadly not, no ...

I'm working on a couple 6502 projects that are essentially embedded* (they use a discrete 6502 but there's no general keyboard/monitor for developing on), so was needing a system that I could use to develop the hardware with, hence the backplane for expansion.

Printer was really just "because I can ...

Thank you! I'd love to say that the backplane was carefully planned out, but it's largely just the RC2014 pinout for address and data, and then matched the others as close as possible. It's not intended to be compatible with anything else that's out there. Currently ticks over just find at 1 Mhz but ...

I was needing a general-purpose 6502 system that I could get up and running with minimal thought needed on system architecture or software, so I went with an Apple 1 clone!

It's based on the Apple 1 Mini circuit, but I went with an RC2014 backplane (but not RC2014 compatible) to allow me to extend ...

I first wrote this tool in 2014 and it's been useful for some of my smaller projects to get a hexdump in a more suitable 8 bit format than my Mac's built-in hexdump tool.

It takes inspiration from the formatting of the Apple II system monitor program. I've used this to generate text that I can ...

My first experience was 2002-3 with AppleScript in Mac OS 9.

I playing around with the Script Editor application. It had a record button if you hit that and then started opening windows, creating folders etc the screen filled with the AppleScript commands. My early teenage mind suddenly widened ...

I love how humble Mike always seems in his videos.

Here’s an older video showing his impressive custom BBC micro setup he used back in the day. At the 6:20 mark you’ll see the actual PCB design program he used: https://youtu.be/la-sGpTpkxE

A world apart from how we can do these things today.

You didn't ground pin 1 of the MPU, I hope. Pin 1 on non-WDC 65C02s is a ground, but is the VPB (vector pull) output on the WDC version.

Good catch - I had this grounded! Bent the pin out from the socket as I was already using that handy pin to connect the decoupling cap.

Working on adding the ...

Yep, it's only taken me about 4 years to get to this point!

That's exactly what it was, thank you!

I'm using a WDC chip, and my circuit was based on someone using an older MOS one.

Hi all

Today I started assembly of my first 6502 machine today but having a bit of trouble getting it running.

So far it's simple: reset circuit working and generates a nice low pulse when the button is pressed. Phase 0, 1, 2 and SYNC signals all look right.

BUT! I've got the data bus fixed to ...

Hi all! Been lurking for a few months but now it's time to come out.

My interest in the 6502 comes from my Apple II and wanting to learn more about it's internals. I've been playing with digital electronics and microcontrollers for the last 10 years so I'm looking for the next level.

I'm starting ...