Routines
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FC45: 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 FC45 LD A,C
FC46 AND $C0
FC48 RRCA
FC49 RRCA
FC4A RRCA
FC4B ADD A,$40
FC4D LD H,A
FC4E LD A,C
FC4F AND $07
FC51 ADD A,H
FC52 LD H,A
FC53 LD A,C
FC54 RLCA
FC55 RLCA
FC56 AND $E0
FC58 OR B
FC59 LD L,A
FC5A RET
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