mikemac wrote on Thu, 05 March 2020 08:39

Thanks for the pinouts of the discrete I/O port.

One more question (for the moment):

4- Do you have any unused pins left on the 7128S? The CF/IDE interface doesn't have its IRQ signal attached to anything. I've never written a polling driver in Linux before. I don't know what issues will come up as a result.

5 - What are the IRQ assignments for the M68K? IRQ681! appears to be the only IQR on the system.

The answers are kind of related. Bill doesn't believe in autovectoring , and he'd need to drive the data lines to vector the CF interrupt, so no CF interrupt.

The '681 vector is whatever you choose to program into the chip at initialization time. Unless there's specific logic in the '030 to stop it, you could have it make a system call if you really wanted to...