Routines
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7308: Calculate Screen Address
Used by the routines at 62FF, LaserBeam_Animate, DisplayPlayerLives, PrintString, 7224, 723C and 766D.
ScreenAddress 7308 LD A,L A=L.
7309 RRCA A=A / 08.
730A RRCA
730B RRCA
730C AND %00011111 Keep only bits 0-4.
730E LD L,A L=A.
730F LD A,H A=H.
7310 RLCA A=A * 04.
7311 RLCA
7312 AND %11100000 Keep only bits 5-7.
7314 OR L
7315 LD L,A L=A.
7316 LD A,H A=H.
7317 AND %00000111 Keep only bits 0-2.
7319 EX AF,AF' Switch to the shadow AF register.
731A LD A,H A=H.
731B RRCA A=A / 08.
731C RRCA
731D RRCA
731E AND %00011000 Keep only bits 3-4.
7320 OR %01000000 Set bit 6.
7322 LD H,A H=A.
7323 EX AF,AF' Switch to the shadow AF register.
7324 OR H
7325 LD H,A H=A.
7326 RET Return.
View the equivalent code in;
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