======= TurboGrafx compatibility issues =======

General: 
 + Noise Channel isn't right. Less obnoxious now, still not happy.
 + T Flag implemented for ADC, EOR. Log warning if used by any other instructions. Should probably just do it for the others, but I hate not having a test case.
 + Video timing is off.
 + Audio volumes are probably wrong.
 + LFO is not implemented, though I can't tell.

Air Zonk          - Freezes shortly into a new game
Battle Ace        - Some gfx glitches
Battle Royale     - Doesnt boot
Bravoman          - Doesn't boot
Cadash            - Camera is all crazy. Very sensitive to interrupt timing and timing in general.
Chouzetsu Rinjin  - Doesnt boot
Cyber Dodge       - Minor gfx issues
Davis Cup Tennis  - uh lets just say it doesnt work in creative ways
Dead Moon         - Minor gfx issues
Dragon Curse      - Terribly annoying sprite flicker - presumably timing related
Dragon Egg        - Doesn't boot
Fighting Run      - Corruption issues
Final Solider     - Graphics corruption issues
Griffon           - Dies in the new game sequence
Gunboat           - Crash / CPU Break (Needs BRAM)
Hisou Kihei Serd  - Doesn't boot
Idol Hanafuda Fan Club - Doesn't boot
Impossamole       - Gfx issues
Legendary Axe     - Doesn't boot
Legendary Axe II  - Corruption, freezes in opening sequence
Madoo Granzort    - Graphics issues because VPC renderer is not using new frame timing
Magical Chase     - Freezes when starting 1st level - waiting for DMA completion IRQ?
MML Demo          - Echo channels are too loud (equal volume!)
Naxat Open        - Crashes when you start new game
New Adventure Island - Minor gfx issues
Night Creatures   - Some gfx glitches
Outrun            - 'Sea Wind' sample when selecting music is not playing ...... raster issues, now more annoying than before
Populous          - Game freezes on starting new game - *** NEEDS BATTERY SAVERAM ***
Power Drift       - Timing glitch... starting new game runs slower than it should
R-Type            - Funky corruption after killing final boss in Stage 8
Side Arms         - Video timing issue - bottom arms display shouldn't be visible
Sinistron         - Raster effect errors
Soldier Blade     - Freezes about 5 minutes in. Always in the same spot, fortunately. I have a savestate.
Strip Fighter     - Minor gfx glitches (status area)
Turrican          - Playable, issues with opening sequence
Valkyrie No Densetsu - Freezes in title sequence


Stuff I Fixed That's Not In Other Docs:

+ Street Fighter II special mapper
+ Populous has special BRAM / saveRAM (I have not yet fixed this) - Gunboat appears to be the same
+ After Burner - There is a 1-instruction delay on changes to IRQ Control Byte taking effect
+ There is a one-instruction delay on changes to the I flag taking effect
  - Affects (Not a complete list): Blodia, Body Conquest 2, Champions Forever Boxing,
    Cross Wiber, Jackie Chan, Jigoku Meguri, New Adventure Island, World Beach volley
  - Actually, I'm not at all convinced there's always a 1-instruction delay on the I-flag.
    But this fixes several games; clearly there are delays in some scenarios. But it's not clear
    to me that this delay is ALWAYS present.  