Based on ktwo's and my own research
SystemID NES
005A b u 0 RAM RNG
0325 b u 0 RAM Second Warp Active
005D b u 0 RAM Frame Counter
003B b u 0 RAM Current Map
003C b u 0 RAM Saved Map
004D b u 0 RAM Screen Scroll X1
004C w u 0 RAM Screen Scroll X2
004F b u 0 RAM Screen Scroll Y1
004E b u 0 RAM Screen Scroll Y2
0066 b u 0 RAM Carried Object
00C7 b u 0 RAM Health 1
00C6 b u 0 RAM Health 2
00DC b u 0 RAM Upgrades
00CB b h 0 RAM Score5
00CC b h 0 RAM Score4
00CD b h 0 RAM Score3
00CE b h 0 RAM Score2
00CF b h 0 RAM Score1
00D0 b h 0 RAM Score0
00C9 b u 0 RAM Max Health 1
00C8 b u 0 RAM Max Health 2
0197 b u 0 RAM Ship Pos X 3
0200 b u 0 RAM Ship Pos X 2
021F b u 0 RAM Ship Pos X 1
023E b u 0 RAM Ship Pos Y 3
025D b u 0 RAM Ship Pos Y 2
027C b u 0 RAM Ship Pos Y 1
029B b u 0 RAM Ship Vel X 2
02BA b u 0 RAM Ship Vel X 1
02D9 b u 0 RAM Ship Vel Y 2
02F8 b u 0 RAM Ship Vel Y 1
0336 b u 0 RAM Ship Vel X Sign
0355 b u 0 RAM Ship Vel Y Sign
00C7 b u 0 RAM Fuel Remaining 1
00C6 b u 0 RAM Fuel Remaining 2
0374 b u 0 RAM Ship Angle
027F b h 0 RAM Shot Active
0065 b u 0 RAM Shields Active
0330 b h 0 RAM Object Type 1
03A0 w u 0 RAM
0513 b u 0 RAM Fuel Delivered
0461 b u 0 RAM Eye State
0458 b h 0 RAM Eye Health
038B b h 0 RAM Eye Aperture
041A b u 0 RAM Eye Timer