Unknown ($C016—C01E)

C016: CC FF FF     LDD #$FFFF  Set D (A and B) with 1111 1111
C019: FD 26 FA     STD $26FA   Store 1111 1111 to 26FA, 26FB
C01C: FD 26 FC     STD $26FC   Store 1111 1111 to 26FC, 26FD

We're setting all the bytes from 0x26FA to 0x26FD to FF (i.e. all 1's). I don't yet know why.

Written on January 25, 2015