Routines
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6820: Get an attribute from screen
Used by the routines at 67BA, 67CC and 70CA.
Input
A On exit, holds the chosen attribute
B Y co-ordinate
C X co-ordinate
6820 LD HL,$57DF
6823 LD DE,$0020
6826 INC B
6827 ADD HL,DE
6828 DJNZ $6827
682A LD B,C
682B INC B
682C INC HL
682D DJNZ $682C
682F LD A,(HL)
6830 RET
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