I played around with the W65C02SXB over the last couple of weeks and wrote up my conclusions here:
viewtopic.php?f=4&t=6326&p=90392#p90392

I too managed to get my W65C02SXB up and running using some of the tools from here. I eventually wrote up my own python script as a learning exercise:

https://github.com/kalj/sxb

As part of this I (manually) disassembled the flash image, and got this:

https://gist.github.com/kalj ...

Thanks all for helping out. I just made the pcb order to JLCPCB. Can't wait for the stuff to arrive!

I believe I found an answer to my NMI/DS1813 question:
viewtopic.php?f=2&t=2871&start=0#p31909
Nice!

Oh, and one final question. Which would you go with for the power socket: DC barrel connector or USB B / USB mini? I can't make up my mind.

Okay, so sounds like something that is rarely used, but which could still come in handy.

What is the most space efficient way of doing the NMI debouncing? I'd prefer if I didn't have to fit an extra 74HC14. I guess I could try to duplicate the reset circuit with the ds1813, but maybe that gives ...

Yep, the oscillator will sit in one of these: https://www.mouser.se/ProductDetail/535-1108800

Regarding an NMI button for getting out of a crashed program - couldn't I already achieve the same thing by pressing the reset button?

Wow, that build is something out of this world. Thanks for writing that detailed page about it!

honestly I wouldn't bother with including more voltages. the only one i could think of that would be useful to have on hand is 3.3V, to interface things like FPGAs, SD Cards, and a Raspberry Pi (and pico) if you're into that.
If you actually want to get into sound generation it should be somewhat ...

Is it too late to allow for +/- split supplies(maybe 12V or 15V) in addition to the 5V? The reason is you may want to create a device where you want to use op-amps or other analogue circuitry that requires split supplies and/or voltages higher than 5V.

But I do favor bussed computers. Nice ...

I wonder if you might want to include the PHI2 qualified read and write signals on that 'ctrl' bus to support non-6500 type peripheral ICs?

That's a good suggestion. Something like this:

read_write_qualify_alt.gif

I thought about that too. In fact, I guess I already have that signal ...

Updated schematic with added ds1813, and a smaller CXO. Are these colors better?

Oh and thanks for pointing out regarding HC vs LS chip families. I have understood that the HCT family is TTL compatible, but it is still CMOS like the HC, so should be okay, or?

Hi Stegosaurus,

I am sorry about the colors, is it the combination of red/green that is problematic for colorblindness? This is how kicad draws stuff by default, I will see if I can tweak that.

Thanks for the heads up regarding the reset circuitry; the page you linked to explained what I need to ...

I am working on my own 8-bit computer based on the 65c02, and after about a year at the breadboard stage, I am now preparing a PCB for a more permanent design.

Basically, the architecture is based the one from Ben Eaters video series, but with a slightly more advanced address decoding scheme to ...