$CED9/52953:   Erase work storage

Jump from $CE2C, $CE84:

CED9: A9 00     LDA #$00
CEDB: 85 8B     STA $8B
CEDD: 85 8C     STA $8C
CEDF: 85 8D     STA $8D
CEE1: 60        RTS

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