Routines
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E89C: Static Animation
Used by the routine at Game_Initialisation.
demo-static
StaticAnimation E89C LD B,$4B B=4B.
StaticAnimation_0 E89E PUSH BC Stash BC on the stack.
E89F LD B,$04 B=04.
E8A1 LD C,$16 C=16.
StaticAnimation_1 E8A3 LD A,R A=the contents of the Memory Refresh Register.
E8A5 AND %00001111 Keep only bits 0-3.
E8A7 LD D,A D=A.
E8A8 LD A,R E=the contents of the Memory Refresh Register.
E8AA LD E,A
E8AB PUSH BC Stash BC on the stack.
E8AC CALL Calculate_ScreenBlockAddress Call Calculate_ScreenBlockAddress.
E8AF EX DE,HL Exchange the DE and HL registers.
E8B0 LD B,$08 B=08.
StaticAnimation_2 E8B2 PUSH BC Stash BC and DE on the stack.
E8B3 PUSH DE
E8B4 LD BC,$000A BC=000A.
E8B7 LDIR LDIR.
E8B9 POP DE Restore DE from the stack.
E8BA INC D Increment D by one.
E8BB POP BC Restore BC from the stack.
E8BC DJNZ StaticAnimation_2 Decrease counter by one and loop back to StaticAnimation_2 until counter is zero.
E8BE POP BC Restore BC from the stack.
E8BF INC B Increment B by one.
E8C0 LD A,$0C Jump to StaticAnimation_1 if B is not equal to 0C.
E8C2 CP B
E8C3 JR NZ,StaticAnimation_1
E8C5 LD H,$05 H=05.
E8C7 LD BC,$012C BC=012C.
StaticAnimation_3 E8CA LD A,(HL) A=*HL.
E8CB AND %00011000 Keep only bits 3-4.
E8CD OR %00000101 Set bits 0, 2.
E8CF OUT ($FE),A Set border to the colour held by A.
E8D1 INC HL Increment HL by one.
E8D2 DEC BC Decrease BC by one.
E8D3 LD A,B Jump to StaticAnimation_3 until BC is equal to 00.
E8D4 OR C
E8D5 JR NZ,StaticAnimation_3
E8D7 POP BC Restore BC from the stack.
E8D8 DJNZ StaticAnimation_0 Decrease counter by one and loop back to StaticAnimation_0 until counter is zero.
E8DA LD HL,$5896 HL=5896 (attribute buffer location).
E8DD LD DE,$0020 DE=0020.
E8E0 LD B,$08 B=08.
StaticAnimation_4 E8E2 PUSH HL Stash HL and BC on the stack.
E8E3 PUSH BC
E8E4 LD B,$0A B=0A.
StaticAnimation_5 E8E6 LD (HL),$00 Write 00 to *HL.
E8E8 INC HL Increment HL by one.
E8E9 DJNZ StaticAnimation_5 Decrease counter by one and loop back to StaticAnimation_5 until counter is zero.
E8EB POP BC Restore BC and HL from the stack.
E8EC POP HL
E8ED ADD HL,DE HL+=DE.
E8EE DJNZ StaticAnimation_4 Decrease counter by one and loop back to StaticAnimation_4 until counter is zero.
E8F0 RET Return.
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