Raw Codes:
1941 Counter Attack (Supergrafx)
Player 1 Score 000000xx: 1F00F4
Player 1 Score 0000xx00: 1F00F5
Player 1 Score 00xx0000: 1F00F6
Player 1 Score xx000000: 1F00F7
Player 2 Score 000000xx: 1F00F8
Player 2 Score 0000xx00: 1F00F9
Player 2 Score 00xx0000: 1F00FA
Player 2 Score xx000000: 1F00FB
Max Scores (Names and Scores): 1F020A-1F0230
Level Option: 1F0232 ($00-$07)
Timer Option: 1F0233 ($00-$03)
Speed Option: 1F0234 ($00-$03)
Life Option: 1F0235 ($03-$04)
Coin Option: 1F0236 ($03-$05)
Sound Option: 1F0237
M-Gun: 1F080B
Energy: 1F0820
Counter CONTINUE: 1F0823
Y-Coord plane: 1F4BF5
X-Coord plane: 1F4DD5
Situation Option (Hiden Menú): 1F5371
00: Level
02: Timer
04: Speed
06: Life
08: Coin
0A: Sound
Counter for cheat: 1F59B1 (I think you must press button II sixteen times in warning screen to see Situation Menú)
If changes the value in byte $5830 with a hexadecimal editor (value $10) you can need less times to show the Situation Menú.
1941 Counter Attack (Supergrafx)
Player 1 Score 000000xx: 1F00F4
Player 1 Score 0000xx00: 1F00F5
Player 1 Score 00xx0000: 1F00F6
Player 1 Score xx000000: 1F00F7
Player 2 Score 000000xx: 1F00F8
Player 2 Score 0000xx00: 1F00F9
Player 2 Score 00xx0000: 1F00FA
Player 2 Score xx000000: 1F00FB
Max Scores (Names and Scores): 1F020A-1F0230
Level Option: 1F0232 ($00-$07)
Timer Option: 1F0233 ($00-$03)
Speed Option: 1F0234 ($00-$03)
Life Option: 1F0235 ($03-$04)
Coin Option: 1F0236 ($03-$05)
Sound Option: 1F0237
M-Gun: 1F080B
Energy: 1F0820
Counter CONTINUE: 1F0823
Y-Coord plane: 1F4BF5
X-Coord plane: 1F4DD5
Situation Option (Hiden Menú): 1F5371
00: Level
02: Timer
04: Speed
06: Life
08: Coin
0A: Sound
Counter for cheat: 1F59B1 (I think you must press button II sixteen times in warning screen to see Situation Menú)
If changes the value in byte $5830 with a hexadecimal editor (value $10) you can need less times to show the Situation Menú.