Thank-you for the advice. So far it has been mostly SoC stuff, and I recently got side-tracked learning some armv8 assembly, which reminds me somewhat of my 68000 days and has been good fun.
I did try QEMU for the first time last week, but started thinking I'd need some way to mock out all the hardware, and I only got as far as UART. But now that you mention it I'll take another look. There is a lot of multi-core mbox? IRQ stuff I'm about to tackle next, and I dont see why I cant develop all of that independent of the hardware.
I seem to be learning the hard way. I spent the first 12 months debugging via the only thing I could get working, an onboard RGB LED.
Multi-core is a level of complexity that I have no experience with, there were some i386 / i486 multi-cpu boards but I don't remember every having one of those. We did have a very early dual CPU pentium, but by that time the OS was already mothballed and we had standardized on Linux.
I did try QEMU for the first time last week, but started thinking I'd need some way to mock out all the hardware, and I only got as far as UART. But now that you mention it I'll take another look. There is a lot of multi-core mbox? IRQ stuff I'm about to tackle next, and I dont see why I cant develop all of that independent of the hardware.
I seem to be learning the hard way. I spent the first 12 months debugging via the only thing I could get working, an onboard RGB LED.