Routines
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7CAF: Game Selection Menu
Used by the routine at GameInitialisation.
Prints the seven menu lines, then the copyright message and the title. The icons were drawn by MenuIcons. The main registers are used to step through the attribute table at GameSelection_Attributes, whilst the shadow registers step through the Y position table at GameSelection_Position and the text at GameSelection_Text.
game-menu
GameMenu 7CAF LD HL,$BE4C Write BE4C (the main font, see MainFont) to FontPointer.
7CB2 LD ($5E01),HL
7CB5 LD DE,$7CEA Point DE at the menu attribute table at GameSelection_Attributes.
7CB8 EXX Switch to the shadow registers.
7CB9 LD HL,$7CF1 Point HL' at the menu Y position table at GameSelection_Position.
7CBC LD DE,$7CF8 Point DE' at the menu text at GameSelection_Text.
There are seven lines of text.
7CBF LD B,$07 B'=07 (the number of lines to print).
GameMenu_Loop 7CC1 EXX Switch back to the normal registers.
7CC2 LD A,(DE) Copy the attribute of the line from the menu attribute table to Current_MenuAttribute.
7CC3 LD ($5E22),A
7CC6 INC DE Move DE on to the text of the line.
7CC7 EXX Switch to the shadow registers.
7CC8 PUSH BC Stash the line counter on the stack.
7CC9 LD A,(HL) Fetch the Y position of the line.
7CCA INC HL Move HL' on to the next Y position in the table.
7CCB PUSH HL Stash the position table pointer on the stack.
7CCC LD H,A Set the Y position of the line in H'.
7CCD LD L,$58 Set the X position of the line to 58 in L'.
7CCF CALL MenuWriteText Call MenuWriteText to print the line.
7CD2 EXX Switch to the shadow registers.
7CD3 POP HL Restore the position table pointer from the stack.
7CD4 POP BC Restore the line counter from the stack.
7CD5 INC DE Move DE' on to the start of the next line of text.
7CD6 DJNZ GameMenu_Loop Decrease the line counter by one and loop back to GameMenu_Loop until all seven lines have been printed.
Print the copyright message at the bottom of the screen.
7CD8 LD HL,$B800 HL=B800 (a Y position of B8 and an X position of 00).
7CDB LD DE,$7D51 Point DE at the copyright messaging at Message_Copyright.
7CDE CALL PrintStringColour Call PrintStringColour to print the string.
Print the title at the top of the screen.
7CE1 LD HL,$0020 HL=0020 (a Y position of 00 and an X position of 20).
7CE4 LD DE,$7D72 Point DE at the game selection title text at GameSelection_Title.
7CE7 JP PrintStringColour Jump to PrintStringColour to print the string.
View the equivalent code in;
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