EclaireXL

A few fixes in pokey from when I was working on pokeymax.

Also the start of Atari 800 support. Some bugs still, beeps on cold start and something up with 16k/32k. Memo pad does not work even in 16/32K, but Robotron does!! Can anyone tell what I did wrong here? In a real 800 is the ram meant to be duplicated (e.g. 0-4000 is also in 4000-8000 for 16k)?

• Run pokey on final sub-cycle, rather than on memory access completed sub-cycle (reduces sample jitter) (change lost somehow)
• Some pokey 2 tone timing fixes
• Alpha version of atari800 support
• * RNMI added to Antic
• * Disconnect portb when in 800 mode
• * Disconnect cart present when in 800 mode (allows 4th port trigger to work better)
• * 16/32/48/52K options