$FA7B/64123:   Prepare fast head movement

FA7B: 38        SEC
FA7C: AD 07 1C  LDA $1C07
FA7F: E5 5F     SBC $5F
FA81: 8D 05 1C  STA $1C05
FA84: C6 60     DEC $60         ; decrement counter
FA86: D0 0C     BNE $FA94       ; not yet zero?
FA88: A5 5E     LDA $5E
FA8A: 85 60     STA $60
FA8C: A9 97     LDA #$97
FA8E: 85 62     STA $62
FA90: A9 FA     LDA #$FA        ; pointer $62/$63 to $FA97
FA92: 85 63     STA $63

Jump from $FA86, $FA99, $FAA3, $FAB0:

FA94: 4C 2E FA  JMP $FA2E

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