[1F 60] - ?

C1/5494: C2 31        REP #$31                  Flag manipulation.
C1/5496: 8A           TXA                       A = initial_X;
C1/5497: 20 FE 00     JSR $00FE

C1/00FE: C2 31        REP #$31                  Flags and direct page manipulation.
C1/0100: 0B           PHD 
C1/0101: 48           PHA 
C1/0102: 7B           TDC 
C1/0103: 69 F0 FF     ADC #$FFF0
C1/0106: 5B           TCD 
C1/0107: 68           PLA 
C1/0108: AA           TAX                       X = initial_X;
C1/0109: AD 6C 43     LDA $436C                 A = $7E436C value
C1/010C: F0 2A        BEQ $0138
C1/010E: AD C2 4D     LDA $4DC2
C1/0111: D0 25        BNE $0138
C1/0113: 80 04        BRA $0119
C1/0115: 22 42 2E C1  JSR $C12E42
C1/0119: AD 6D 00     LDA $006D
C1/011C: 29 A0 A0     AND #$A0A0
C1/011F: F0 F4        BEQ $0115
C1/0121: 80 41        BRA $0164
C1/0123: AD 6C 43     LDA $436C
C1/0126: F0 10        BEQ $0138
C1/0128: AD 6D 00     LDA $006D
C1/012B: 29 10 80     AND #$8010
C1/012E: C9 10 80     CMP #$8010
C1/0131: D0 05        BNE $0138
C1/0133: 9C 45 96     STZ $9645
C1/0136: 80 05        BRA $013D
C1/0138: AD 45 96     LDA $9645
C1/013B: D0 E6        BNE $0123
C1/013D: E0 00 00     CPX #$0000
C1/0140: F0 03        BEQ $0145
C1/0142: 8A           TXA 
C1/0143: 80 03        BRA $0148
C1/0145: AD 4B 96     LDA $964B
C1/0148: AA           TAX 
C1/0149: 86 0E        STX $0E
C1/014B: 80 04        BRA $0151
C1/014D: 22 42 2E C1  JSR $C12E42
C1/0151: A6 0E        LDX $0E
C1/0153: 8A           TXA 
C1/0154: CA           DEX 
C1/0155: 86 0E        STX $0E
C1/0157: C9 00 00     CMP #$0000
C1/015A: F0 08        BEQ $0164
C1/015C: AD 6D 00     LDA $006D
C1/015F: 29 A0 A0     AND #$A0A0
C1/0162: F0 E9        BEQ $014D
C1/0164: 2B           PLD 
C1/0165: 60           RTS 

C1/549A: A9 00 00     LDA #$0000
C1/549D: 60           RTS