Routines
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64581: Scroll Window: Screen Address
Used by the routine at ScrollWindow.
Returns the screen address of pixel line C, column B.
Input
B Column
C Pixel line
Output
HL Screen address
ScrollWindow_ScreenAddress 64581 LD A,C
64582 AND 192
64584 RRCA
64585 RRCA
64586 RRCA
64587 ADD A,64
64589 LD H,A
64590 LD A,C
64591 AND 7
64593 ADD A,H
64594 LD H,A
64595 LD A,C
64596 RLCA
64597 RLCA
64598 AND 224
64600 OR B
64601 LD L,A
64602 RET
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