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CD47: Routine at CD47
Used by the routine at CAE7.
CD47 LD A,($D2FE) If bit 2 of D2FE is zero then jump to CD53.
CD4A BIT 2,A
CD4C JR Z,$CD53
CD4E CALL $F880
CD51 JR $CD56
CD53 CALL Bang
CD56 CALL Populate_Door_Buffer
CD59 LD HL,$CC59
CD5C LD A,(HL)
CD5D DEC A
CD5E LD (HL),A
CD5F JP NZ,Prep_Display_Phase_1
CD62 SCF
CD63 RET
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