After fighting with WDC's simulator for a while I got fed up and wrote a simple W65C816 emulator in C++ which compiles under Windows, Ubuntu and Ubuntu Mate on a Raspberry Pi and supports a much bigger address space.

I've also ported the core C++ part to a Diligent ChipKIT WiFire (a 200Mhz PIC32MZ board with 512K of RAM and 2M of Flash ROM) which can simulate a much bigger (and probably faster) system than a real W65C816SXB for a third of the cost.

The code is here https://github.com/andrew-jacobs/emu816

Its not perfect and there is no decimal mode or I/O yet but its useful for tracing ROM code in places that the SXBs don't let you get to easily. I shall continue adding features as I work on my 65C816 code.

_________________
Andrew Jacobs
6502 & PIC Stuff - http://www.obelisk.me.uk/
Cross-Platform 6502/65C02/65816 Macro Assembler - http://www.obelisk.me.uk/dev65/
Open Source Projects - https://github.com/andrew-jacobs

Nice! It would be interesting to get a ballpark figure for the performance you get.

Awesome, we've been sorely in need of options for 816 simulators. Once it gets some basic I/O I'll have to give it a try with one of my projects

A thought: in the absence of an 816 test suite, it should be possible to test emu816 against lib65816.

I skimmed the code, looks nice and clean. I think the way you wrote it was clever.