Hey. Cool that this project is still alive. It's my favourite simulator on my Mac. Especially by defining on machine setups. Are there any plan adding the 65C02 opcodes to this puppy? It would be a big step forward.

Mario.

Hi Mario!

Yes, definitely. 65C02 and 65816 are on the roadmap for 2.0. I ...

Hello all,

Yes, Symon is up to version 1.2.0 now. It's slowly being expanded into a more useful debugging tool for 6502 SBC's. Maik Marten contributed mult-machine support for version 1.0, so it's easier to add new machine descriptions to the source.

As for a C version, back in 2014 (wow, that ...

I've been busy over the holiday adding experimental 6545 CRTC support to my 6502 simulator project, "Symon".

https://github.com/sethm/symon

http://forum.6502.org/images/migrated/031160-000.png

I've been meaning to do a real 6845/6545 project on my 6502 SBC, but since I was too lazy to work on ...

Oh wow, this is so cool!!

I absolutely love how chips like the Propeller have really opened up vintage hardware replica and simulation projects. It's almost plug-and-play now, it's fantastic!

That keyboard is great, too. I'm sure it's not so easy to type on, but it's a damn cool idea.

But you can ...

I've just released version 0.8.5 of Symon (available via GitHub or the main Symon homepage ). It includes both of Mario's changes.

Actually, I modified the "Multiple Step" feature a little, and provided a drop-down selector for the number of steps to take. It defaults to 1, same as it used to be ...

Hi scotws!

I'm glad you got it to work. I really need to get a pre-compiled JAR available to download, so people don't need to worry about trying to build it.

a) toggle button for the memory inspector that shows character strings (it will show garbage for code, of course), and b) hovering the ...

Hi everyone,

This is only tangentially 6502 related, I hope you all won't mind my posting it here. I've been looking at the cassette input circuit on the Synertek SYM-1 schematics. Here's the relevant section:

http://forum.6502.org/images/migrated/023784-000.png

I understand the principle ...

Hi Everyone,

I know, I know, the world needs another 6502 simulator like it needs a hole in the head. True! But even though the decision was ill-advised, I decided to write one anyway.

The homepage for my simulator, "Symon", is here: https://github.com/sethm/symon

Symon simulates an entire 6502 ...

This is a really cool project - definitely count me in if it's not too late!

I maintain a 65816 emulator library, called "lib65816", for the Linux platform.

Hello! Thanks for your reply. I'm sorry I misread your original post, for some odd reason I thought your 65816 library only ran in native mode, not 6502 mode. I have no idea why I believed that! I'll definitely dig ...

I'd just like to add a "me too" to this thread. I've started working on my first ever 6502 SBC (keeping it simple, since this is my first full microcomputer design), and I'd love a simulator for doing software debugging.

The existing simulators I've found seem to be Commodore 64 simulators, or ...