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BFD9: Unused: Fragment 2
Orphaned fragment from an earlier version of the attribute writing code.
Unused_Fragment_2 BFD9 LD C,D Copy D to C.
BFDA RET Z Return if zero flag is set.
BFDB LD BC,$0020 Add 0020 to advance to the next attribute row.
BFDE ADD HL,BC
BFDF LD A,(HL) Read, mask with F8 OR in E and write back.
BFE0 AND $F8
BFE2 OR E
BFE3 LD (HL),A
BFE4 RET Return.
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