EclaireXL

The high-res antic work is still ongoing but I think this is now stable enough for general use.

• High res antic support (2x and 4x colour clock)
• High res antic disables pbi (so works at 1x cpu)
• Sophia style 2 colour high res (pmctl bit 4)
• Turbo freezer/pbi timing clash fixed

There is still work to do on high res, notably sprites do not work and its not aligned (try changing in a dli, there is an offset...).

As you've probably seen on AtariAge we're going to do another run of the prototype boards, with a few fixes. As such I'm going to stop high-res mode dev for a bit to double check some of the hardware works first! Notable the clock generator and the i2c video control.