No jumpers are installed. I have tried both Z3 DMA and PIO, both work fine otherwise except the stack just doesn't start. Have not tried Z2 mode.
The Deneb doesn't generate any kind of log which would indicate what has happened during the boot process?
No Jumpers is the normal setup! Please try Z2 Mode! (just for testing) What other cards are installed in your System ?
I had the Zorro3 Problem when using WB 3.1 ! in 3.9 all is great. 3.1 only works with Z2 Mode for me.
Is the mouse and keyboard working for example in a Game like Ports of Call ? could you try with booting from a gamedisk ?
The lucas-arts adventures works fine with DENEB Mouse and Keyboard for example.
This is just to ensure your hardware is working with your luciferin setup.