[AMIGA] Winuae 2.6.0 beta 12

WinUAE 2.6 beta 12  [17/03/2013]

• AGA border sprite feature emulation is now also cycle-exact. Similar update to borderblank was done in 2.5.0. For example it was possible that sprites were hidden when border sprite bit was set and zero bit planes enabled. (Noticed when doing some unrelated real hardware limit tests)
• Black frame insertion was incorrectly used (if enabled) in <100Hz fastest possible CPU modes.
• Horizontal blanking rewritten, should be more accurate now, programmed display modes only.
• Display emulation tweak, Super72 sprite display corruption is gone.
• Fixed bug introduced in b5, blitter emulation ignored DMA off state in cycle exact mode.
• Emulate DIV divide by zero undocumented flags when CPU >=68020. So far 68020 and 68060 tested and confirmed. Odyssey / Alcatraz and 68020+ CPU does not anymore get stuck in part where spaceship flies above ground.
• CPU halted state didn't disable CPU interrupts.