I just tried to install this library for Kicad 9.0.2 for linux 6.8.0-60-generic x86_64 - and it failed with an error saying that the zip did not contain a valid metadata.json file.

Don't know any more about it; it won't let me try and load from the unwrapped text, and cheekily changing the last ...

Yes, that's correct.

Further to Gfoot's thread "SPI EEPROM boot for 6502" wherein I threatened to "cogitate further and hopefully come back with some useful contributions" , please find below the draft of 65BOOT. This is a solution for booting an otherwise ROM-less 6502 SBC from a small SPI EEPROM, without resorting to ...

I appreciate that Mike has afforded me the luxury of anonymity in this matter, however I wish to publicly apologise for any upset or misunderstanding caused by that part of my post, the one which he deleted. I have given Mike a more detailed apology and explanation, but in summary it was meant to be ...

Yes, a CPLD would be "easier" - if you already have the knowledge and infrastructure to program one. Not everyone does, nor is it trivial to get to that position. For this reason I feel like booting from an SPI EEPROM still has a place if it can be made to work. The solution is far from ideal, but ...

This is a very interesting idea and one I have vaguely contemplated in the past. SPI EEPROMs are smaller, more readily available, cheaper and more easily programmed than parallel EEPROMs (in the modern context, at least). I also like that you can get them in a variety of reasonable sizes, so you're ...

I don't know, but I would imagine that bit of code is recycled between many Atari games of the time.

If you're using the ATmega2560, I presume we're talking the Arduino Mega 2560? In which case I cannot foresee any hardware issues, except that you might want to check for CMOS/TTL level compatibility. If your RIOTs are NMOS/TTL then their output levels might be incompatible with the Arduino's CMOS ...

What kind of autorouter did you use that took wo much effort to setup/use?

I dunno what it was called, its whatever came with Siemens PADS Layout, which was the tool in use by the university at the time - they subsequently switched to EAGLE against my advice (I tried to convince them to use KiCad ...

Yeah, I can confirm that it is in-progress. Mike actually showed me the new HTTPS enabled version of the site, as-was at the time. Though the link appears to be dead now

I'm not a fan of auto-routers either.
I've been designing PCBs for some 40 years and can’t recall ever having used autorouting.
I have only ever used an auto-router once, and that was as part of my university course when we were specifically being taught how to use an auto-router. I found it ...

When I have thought about this in the past - and I actually did half-design a memory protection capable MMU for the 65C02, but I had trouble getting WinCUPL to cooperate with my design - I didn't consider protecting the P register and/or the I bit therein terribly important, because I'd put the Task ...

I, too, recommend Kicad. Its free, its good, what's not to like?

Plus, you can take advantage of my 6502 Kicad Library for all your WDC chip schematic needs.

I’ve been more-or-less following this topic, but I am not really seeing much here that is of interest. Being 6502.org’s unofficial curmudgeon, and at the possible risk of exciting someone’s ire, I will say I mostly view these “Chuck Peddle should have done this and Bill Mensch should have done that ...

A couple of notes:
The '816 offers a lot of software benefits even in '02-emulation mode . There is so much there that's not particularly related to the larger address space or wider registers.
When you put the '816 in native mode, the registers are still 8-bit until you change them to 16-bit ...