LDA $100
EOR #$14
ORA $9D
BEQ +
RTL
+

LDA #$7F
TRB $17
TRB $18
LDA #$3F
TRB $15
TRB $16

LDA #$01
TRB $17
TRB $18
TSB $15
TSB $16

LDA #$30
STA $7B
RTL

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