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Routines |
| Prev: CA1B | Up: Map | Next: CA55 |
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Used by the routine at GameMenu.
Prints the eight lines of the game selection menu. The first time that it is called it also draws the frame around the screen.
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Point at the menu colours, positions and text.
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| DisplayMenu | CA2B | LD DE,$C962 | Point DE at MenuLineAttributes. | |||||
| CA2E | EXX | Switch to the shadow registers. | ||||||
| CA2F | LD HL,$C96A | Point HL at MenuLinePositions. | ||||||
| CA32 | LD DE,$C97A | Point DE at MenuText. | ||||||
| CA35 | LD B,$08 | Set the number of lines to 08. | ||||||
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Print one line from the three lists.
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| DisplayMenu_Loop | CA37 | LD A,(HL) | Fetch the x position. | |||||
| CA38 | INC HL | Move on to the next pair of positions. | ||||||
| CA39 | INC HL | |||||||
| CA3A | PUSH HL | Stash the address of the next pair on the stack. | ||||||
| CA3B | DEC HL | Point HL at the y position. | ||||||
| CA3C | LD H,(HL) | Fetch the y position. | ||||||
| CA3D | LD L,A | Set the x position. | ||||||
| CA3E | EXX | Switch to the shadow registers. | ||||||
| CA3F | LD A,(DE) | Fetch the attribute of the line. | ||||||
| CA40 | INC DE | Move on to the next attribute. | ||||||
| CA41 | EX AF,AF' | Keep the attribute in AF'. | ||||||
| CA42 | EXX | Switch back to the main registers. | ||||||
| CA43 | CALL PrintString | Call PrintString. | ||||||
| CA46 | POP HL | Restore the address of the next pair from the stack. | ||||||
| CA47 | DJNZ DisplayMenu_Loop | Jump to DisplayMenu_Loop until all of the lines have been printed. | ||||||
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Draw the frame the first time.
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| CA49 | LD A,($BBBF) | Return if MenuFrameDrawnFlag is set. | ||||||
| CA4C | AND A | |||||||
| CA4D | RET NZ | |||||||
| CA4E | INC A | Write 01 to *MenuFrameDrawnFlag. | ||||||
| CA4F | LD ($BBBF),A | |||||||
| CA52 | JP DrawFrame | Jump to DrawFrame. | ||||||
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View the equivalent code in;
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