Routines
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54788: Update Screen Buffer
Used by the routines at RunHandlers, SelectionScreen, Print_SelectionScreen, ChangeControls, UserDefinedKeys and Handler_TickerNews.
ScreenBuffer_Update 54788 LD HL,27392 HL=ShadowScreenBuffer.
54791 LD DE,16384 DE=16384.
54794 CALL CopyShadowBufferToScreen Call CopyShadowBufferToScreen.
54797 LD HL,29440 HL=29440.
54800 LD DE,18432 DE=18432.
54803 CALL CopyShadowBufferToScreen Call CopyShadowBufferToScreen.
54806 LD HL,31488 HL=31488.
54809 LD DE,20480 DE=20480.
This routine is called three times which correlates to the three sections of the screen layout.
CopyShadowBufferToScreen 54812 PUSH HL Stash the shadow buffer pointer on the stack.
54813 LD A,D A=D.
54814 EX AF,AF' Exchange AF with the shadow AF register.
54815 LD A,L A=L.
54816 CALL Blit Call Blit.
54819 LD E,A E=A.
54820 LD L,A L=A.
54821 INC D Increment D by one.
54822 INC H Increment H by one.
54823 CALL Blit Call Blit.
54826 LD E,A E=A.
54827 LD L,A L=A.
54828 INC D Increment D by one.
54829 INC H Increment H by one.
54830 CALL Blit Call Blit.
54833 LD E,A E=A.
54834 LD L,A L=A.
54835 INC D Increment D by one.
54836 INC H Increment H by one.
54837 CALL Blit Call Blit.
54840 LD E,A E=A.
54841 LD L,A L=A.
54842 INC D Increment D by one.
54843 INC H Increment H by one.
54844 CALL Blit Call Blit.
54847 LD E,A E=A.
54848 LD L,A L=A.
54849 INC D Increment D by one.
54850 INC H Increment H by one.
54851 CALL Blit Call Blit.
54854 LD E,A E=A.
54855 LD L,A L=A.
54856 INC D Increment D by one.
54857 INC H Increment H by one.
54858 CALL Blit Call Blit.
54861 LD E,A E=A.
54862 LD L,A L=A.
54863 INC D Increment D by one.
54864 INC H Increment H by one.
54865 CALL Blit Call Blit.
54868 EX AF,AF' Switch AF back with the normal AF register.
54869 LD D,A D=A.
54870 POP HL Restore the shadow buffer pointer from the stack.
54871 LD A,L L+=32.
54872 ADD A,32
54874 LD L,A
54875 LD E,A E=A.
54876 CP 224 Jump to CopyShadowBufferToScreen if A is not 224.
54878 JP NZ,CopyShadowBufferToScreen
54881 CALL Blit Call Blit.
54884 LD E,A E=A.
54885 LD L,A L=A.
54886 CALL Blit Call Blit.
54889 LD E,A E=A.
54890 LD L,A L=A.
54891 CALL Blit Call Blit.
54894 LD E,A E=A.
54895 LD L,A L=A.
54896 CALL Blit Call Blit.
54899 LD E,A E=A.
54900 LD L,A L=A.
54901 CALL Blit Call Blit.
54904 LD E,A E=A.
54905 LD L,A L=A.
54906 CALL Blit Call Blit.
54909 LD E,A E=A.
54910 LD L,A L=A.
54911 CALL Blit Call Blit.
54914 LD E,A E=A.
54915 LD L,A L=A.
54916 CALL Blit Call Blit.
54919 RET Return.
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