Enabled direct CPU access to upper 16 meg.  Currently clashes with autoconfig Fast RAM, but can still be used with care.
Changed PLL phase shift a little, 24 meg Fast RAM now works for me.
Added a wait state to the main CPU - will hopefully fix the stability problems.
Enabled Turbo Chipram, improved sound, separated scanline mode for interlaced screens.
Updated OSD code for interlace/scanline change
Added platform-specific registers to cfide.
Added turbo-chipram selector in menu, moved fastram config out of Minimig core.
Added two-way cache.  Currently breaks turbo chipram, but otherwise working.
Slight cache speedup
Got a simple single-word write buffer cache working.
Remapped SDRAM banks, FastRAM and OSD memory locations in preparation for second access slot.
More preparation for the second access slot.
Dual-slot working, but no worthwhile speedup yet.
Removed waits for enaWRreg - big speedup.
Reverted address-mangling change since it turned out to be counter-productive.
Made use of colour in OSD to differentiate different menu levels.
Added Autoconfig for extra Fast RAM, and adjusted menu accordingly.
Changed background colour of file selector.
Integrated patches from universal menu
Fixed major RAM aliasing bug - 24 meg should work properly now.