... there tend to veer off into silly quabbles about mustard and pineapple pizza. One of the threads here (just to mention one) is about "the Cactus". Amazing. I pulled up his web site, and the last post on there was in fact just a few hours old.

So much to digest, and so little time. Thanks ...

Thanks for the update!

Not to zombie a thread too far dead, but alot has happened in the past few years with ol' prickly.

twincactus.jpg
I did finally get around to doing a PCB design, it just took some time to learn KiCAD well enough to make something that worked. First attempt was an awful SBC directly based on Grant ...

... with the 6502 address bus.

Nice to see other 6507 projects...

Mine:

https://unicorn.drogon.net/IMG_20231220_193620_DRO.jpg

Have you seen the Cactus project? It was discussed here a few years back...

http://www.commodorez.com/cactus.html

-Gordon

So nice and compact! :D

Yes, the Cactus is ...

Nice to see other 6507 projects...

Mine:

https://unicorn.drogon.net/IMG_20231220_193620_DRO.jpg

Have you seen the Cactus project? It was discussed here a few years back...

http://www.commodorez.com/cactus.html

-Gordon

... made and you might be able to find them...

I don't think there were any produced back then with switches and LEDs (like Altair) - but search for Cactus 6502 to find a modern version (a personal project, not a kit though).

For other "real" 6502 systems - BBC Micros are easy to get hold of - BBC ...

... tool is available in bulk because it is the shape, size and style of the discontinued toggle switches found on mini-computers and Commodore Z's Cactus 6502 . It is also molded in historically gaudy colors. Indeed, replication of the Cactus design may have been inhibited by a lack of suitable ...

... surface mount components being pre-assembled. This might be the most significant interfacing of 6502 projects since a MOnSter6502 was placed in a Cactus . Whether or not I can obtain a functional Planck and whether or not MCL65+ and Planck are compatible, the 600MHz, dual issue, ARM M7 in a Teensy ...

After watching videos from the Vintage Computer Festival regarding RCA1802 and Cactus, I am disappointed to discover that ROM programming remains an ongoing hassle. Although, it doesn't help when people introduce endian problems or use portable programming software on a hostile platform . Some use ...

... platform specific but more on topic I think:
https://www.commocore.com/repository/c64unit
https://github.com/martinpiper/BDD6502
http://www.cactus.jawnet.pl/attitude/?action=readtext&issue=18&which=15
soci, thanks for finding those! I always like to look at other systems and see how they ...

... use as they will go away at some point once I figure out a proper replacement for them.

Somewhat platform specific but more on topic I think:

https://www.commocore.com/repository/c64unit
https://github.com/martinpiper/BDD6502
http://www.cactus.jawnet.pl/attitude/?action=readtext&issue=18&which=15

... machine, you need a keypad which acts more like RAM, and a way to slow down the machine to human timescales. (The display is an easier problem than the keypad.) This is what the OSI-300, and the Cactus, have arranged. A bank of switches is easier to sort out for this role than a keypad, I suspect.

You may want to read through this blog: https://commodorez.com/cactus.html as it describes using key-switches and LEDs to single step a 6502 to enter data and display results.

-Gordon

... 003.jpg

2018-08-21 - Blinkenlights! Two great projects working together at VCF West: the MOnSter6502 transistor-level remake running in the Cactus .

http://forum.6502.org/images/migrated/062662-004.jpg

2018-08-24 - 6502 emulated on the very affordable ARM-based Blue Pill board.

http ...

... my mini OSI-300. I've found it to be not only an inspiration, but also a good counterpoint to the significantly more complicated interface of the Cactus.

Sadly, I seem to have fried it during my time at DEFCON -- I've done tests with each of the chips replaced, but not all of them replaced at the ...