I don't like a few features of the 805x, but don't generally complain. However, I don't like the relationship between the system clock and the serial channels, timers, etc. I also prefer that instructions take no more than one clock cycle to execute, irrespective of their content, an would expect that those instructions that can be executed concurrently or out of sequence be executed that way in order to save time.

I'm sticking to the same basic instruction set, particularly in object form, as the tools are pretty good and pretty avaiable. While it might take a year or two to whittle up and verify a new core that's done to my liking, along with the modified peripherals that I'd prefer, I have to find time to contemplate, design, and implement the features and modifications. Who knows ... I may not live long enough to see it realized.

It's still pretty preliminary so far. I've examined some of the enhancements, but they'll be no more difficult than simply implementing a single-clock core.

RE