Have been unable to make interrupt acknowledge work.
interrupt mode 2 set.
monitoring IORQ and M1 not happening at the same time.
It is possible that the interrupt mechanism is not being enabled
Do you have a failing sequence of signals / events / code to reproduce the issue? Thanks
I have installed your z80 cpu on a DE0 nano. It works fine and I am very impressed with it, I have been experimenting with interrupts and have found that the NMI works fine, But when I try the other interrupts the Interrupt acknoledge response M1 and IORQ both going low together doesn't happen.
Goran, Please accept my apologies, I have been doing further work and found that some how one or more of the a-z80 files was corrupted. I downloaded another copy and used that and everything now works OK.