$EF4A/61258:   Compute Bit Count

Jump from $F41D:

EF4A: A2 09     LDX #$09
EF4C: A9 20     LDA #$20
EF4E: 2C 93 02  BIT $0293     ; RS232 Pseudo 6551 control Register Image
EF51: F0 01     BEQ $EF54
EF53: CA        DEX

Jump from $EF51:

EF54: 50 02     BVC $EF58
EF56: CA        DEX
EF57: CA        DEX

Jump from $EF54:

EF58: 60        RTS

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