0x2F000	mapped to BEC2F000, executed directly from ROM

0x2F000	hijack exception handler reroute
ADDIU	SP,SP,FF98
SW	T0,0010 (SP)	;store Tns, Ans, and Sns
SW	T1,0014 (SP)
SW	T2,0018 (SP)
SW	T3,001C (SP)
SW	T4,0020 (SP)
SW	T5,0024 (SP)
SW	T6,0028 (SP)
SW	T7,002C (SP)
SW	T8,0030 (SP)
SW	T9,0034 (SP)
SW	A0,0038 (SP)
SW	A1,003C (SP)
SW	A2,0040 (SP)
SW	A3,0044 (SP)
SW	S0,0048 (SP)
SW	S1,004C (SP)
SW	S2,0050 (SP)
SW	S3,0054 (SP)
SW	S4,0058 (SP)
SW	S5,005C (SP)
SW	S6,0060 (SP)
SW	S7,0064 (SP)
//0x2F05C:
ADDU	T0,SP,R0
ADDIU	T1,T0,0068	;T1=SP+68: 
LUI	T2,8000
ORI	T2,T2,0180	;T2=80000180
//0x2F06C:
LW	T3,0010 (T0)	;T3=previously stored register
NOP
BEQ	T2,T3,+6	;branch if match found
NOP
ADDIU	T0,T0,0004	;T0+=4	next register
BNE	T0,T1,-6	;loop until match found
NOP
BGEZ	R0,+4		;skip if no match ever found
NOP
//0x2F090:
LUI	T2,A000
ORI	T2,T2,0120	;T2=A0000120
SW	T2,0010 (T0)	;replace 80000180 with A0000120
//0x2F09C:
LW	T0,0010 (SP)
LW	T1,0014 (SP)
LW	T2,0018 (SP)
LW	T3,001C (SP)
LW	T4,0020 (SP)
LW	T5,0024 (SP)
LW	T6,0028 (SP)
LW	T7,002C (SP)
LW	T8,0030 (SP)
LW	T9,0034 (SP)
LW	A0,0038 (SP)
LW	A1,003C (SP)
LW	A2,0040 (SP)
LW	A3,0044 (SP)
LW	S0,0048 (SP)
LW	S1,004C (SP)
LW	S2,0050 (SP)
LW	S3,0054 (SP)
LW	S4,0058 (SP)
LW	S5,005C (SP)
LW	S6,0060 (SP)
LW	S7,0064 (SP)
ADDIU	SP,SP,0068
ERET

------------

Other Stuff:
0x2FB00	settings	0x70 long
4754	GT	//could also be palette...
0101	selected pattern and something?
0307	# patterns, # colors?
00
010101	probably scroll on, menuscroll on, sound on

0x30000	code list
0x0	# games in list
0x4	game codes
gamestructure:
	string:	game name, null terminated
	byte:	number of headings under game
headingstructure:
	string:	code name, null terminated
	byte (signed):	number of codes following.  If a negative value, the code is deactivated
note: in both of these lists, 0 is 0, not 1.
Nothing denotes the end of the list, but the official utilities always placed a 0.


There are either some common phrases that are encoded or some simple rle for the text displayed in headings is used.
This list is incomplete - known values:
F6	Key
F7	Have
F8	Lives
F9	Energy
FA	Health
FB	Activate
FC	Unlimited
FD	Player
FE	Always 
FF	Infinite