Routines
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25168: Game Selection Menu
Used by the routine at Game_Restart.
Prints the six lines of the game selection menu, each with its own attribute byte and Y position, and then the copyright message at the bottom of the screen. The main registers hold the pointer to the attribute table, and the shadow registers hold the pointer to the Y position table (HL'), the pointer to the text (DE') and the line counter (B').
game-menu
GameMenu 25168 LD DE,25212 Point DE at the table of menu attributes (GameSelection_Attributes).
25171 EXX Switch to the shadow registers.
25172 LD HL,25218 HL'=GameSelection_Position (the table of Y positions).
25175 LD DE,25224 DE'=GameSelection_Text (the text of the menu).
There are six lines of text.
25178 LD B,6 Set the line counter in B' to 6.
GameMenu_Loop 25180 EXX Switch back to the normal registers.
25181 LD A,(DE) Store the attribute byte of the line to Current_MenuAttribute.
25182 LD (24097),A
25185 INC DE Move onto the next menu attribute.
25186 EXX Switch to the shadow registers.
25187 PUSH BC Stash the line counter (BC') on the stack.
25188 LD A,(HL) Fetch the Y position of the line from the table.
25189 INC HL Move onto the next Y position in the table.
25190 PUSH HL Stash the table pointer on the stack.
25191 LD H,A Set the Y position of the line in H' and the X position (56) in L'.
25192 LD L,56
25194 CALL MenuWriteText Print the line using MenuWriteText.
25197 EXX Switch to the shadow registers.
25198 POP HL Restore the table pointer and the line counter from the stack.
25199 POP BC
25200 INC DE Move DE' onto the next line of text.
25201 DJNZ GameMenu_Loop Decrease the line counter by one and loop back to GameMenu_Loop until all six lines have been printed.
Print the copyright footer.
25203 LD HL,47104 HL=47104 (the screen position of the copyright message).
25206 LD DE,24309 DE=the copyright message (Message_Copyright).
25209 JP PrintStringColour Jump to PrintStringColour.
View the equivalent code in;
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