Hello, are you planing to distribute some form of source code for the STM part? Or some explanation of inner workings? I am interested in everything ICE-related :)  Congrats for this reat & good-looking piece of work, and kind regards!

I need to soon!

I'm really curious about how you're hitting the timing needed, as I've been working on something similar and it's extremely tight even when running at 40x the z80 clock. Those six clocks of wakeup latency after a WFE eat an appreciable chunk of a cycle...

I only synchronize to the Z80 main input clock when reading or writing to memory or I/O, in a busy loop. Making sure its running cached/in ram. So in short the whole Z80 emulation in itself is not clock accurate, it drifts a lot. Its mostly meant to take control of a Z80 system more than running an emulator at the exact speed.

Hey, thanks for the reply! That at least confirms there isn't a magic solution I'm not seeing. Luckily I have other options, although they'll require extra hardware. Was just using an stm32f4 because it was in my junk bin. :)

In Circuit Emulator 

https://en.wikipedia.org/wiki/In-circuit_emulation

Cheers

What does ICE stand for?

In Circuit Emulator