Marble Madness High Scored Data 

EDiting The High Score TEXT that is "High Rollers" in the Game. 
So that you can easily Modify the Scores Amount with a Hex Editor. 

this is an incomplete list of the known codes but it should work as is.

After each name that exist on the in game list, 
inside the rom there are three dots or periods like so ... or ..2  
at the end of each Players name that controls the amount of each Players High Score 
even if there is a space in the name the Hex Codes that the ... code repersents are the control codes
for the Score so you can change these Vaulues using Hexadecimal codes. 
For Marble Madness this TEXT is not compressed inside the rom so you don't need a Table file. 

Where to locate the High Scores in the rom it starts at
0x36C and ends at 0x3C5 
that is somewhere inbetween the lines of 0360 to 03C0 of the Rom


The Known codes and ones that I have tried are as follows 
From the Original Game
#1 SWEEP  52,500 |SWEEP ... the three dots being x05 x19 x00 in hex or the score of 52,500
#2 JULIE  52,250 |JULIE ..2 the three dots being x05 x16 x32 in hex the score of 52,250
#3 TESS   42,000 |TESS  ... the three dots are x04 x14 x00 the score of 42,000
#4 BARRY  41,750 |BARRY ..2 the three dots are x04 x11 x32 resulting in the score of 41,750
#5 KEV    31,500 |KEV   ... x03 x0F x00 Score 31,500
#6 POPPI  31,250 |POPPI ..2 x03 x0C x32 Score 31,250
#7 RACHEL 21,000 |RACHEL... x02 x0A x00 Score 21.000
#8 PAUL   20,750 |PAUL  ..2 x02 x07 x32 Score 20.750
#9 ALI    10,500 |ALI   ... x01 x05 x00 Score 10,500
#10 SIMON 10,250 |SIMON ..2 x01 x02 x32 Score 10,250

From My Hacks of the game
#1 KLOWN   666,666 |KLOWN BBB x42 x42 x42 The Score 666,666 everybody will want to use this code.
#2 *****   696,950 |***** EE2 x45 x45 x32 Score 696,950
#3 ******  686,800 |******DD. x44 x44 x00 Score 686,800
#4 ******  676,750 |******CC2 x43 x43 x32 Score 676,750
#5 *****   656,500 |***** AA. x41 x41 x00 Score 656,500
#6 ******  575,750 |******992 x39 x39 x32 Score 575,750 
#7 ******  565,600 |******88. x38 x38 x00 Score 565,600
#8 *****   707,050 |***** FF2 x46 x46 x32 Score 707,050 
#9 MARBLE  555,500 |MARBLE77. x37 x37 x00 Score 555,500
#10 ****** 545,450 |******662 x36 x36 x32 Score 545,500

Other Tested Codes
#1 KLOWN 698,205 |KLOWN ER. x45 x52 x05 Score 698,250
#8 ***** 707,070 |***** FFF x46 x46 x46 Score 707,070
#8 ***** 909,090 |***** ZZZ x5A x5A x5A Score 909,090
#8 ***** 959,595 |***** ___ x5F x5F x5F Score 959,595
#8 ***** 989,898 |***** bbb x62 x62 x62 Score 989,898
#8 ***** 999,999 |***** ccc x63 x63 x63 Score 999,999 The highest possible score of the Game.


*=Name Censored
x=Hex Code
I gave you the 666 Code and the Highest Possible Score Code.  

Anyway this should give you the Idea of how you can Alter the High Scores of Marble Madness 
for the Nes, Hexadecimal numbers exist from 00-FF that is 1-256 in decimal 
so there are 256 usable codes that can be combined together in groups of 3 for this game 
don't you love math. This should be all you need for hacking the high scores. Best of luck.. 

Happy Hacking.. 
Author: S.K. Dumbbus
Email: spongejayday@yahoo.com