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Routines |
Prev: 29441 | Up: Map |
Continues from the routine at 29706. Returns with the carry flag set if the speech bubble is off-screen.
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29442 | LD E,A | E=ASCII code of the character from the message being spoken | ||||||||
29443 | LD A,(32612) | Copy the speech bubble lip x-coordinate from 32612 to A | ||||||||
29446 | AND 120 | A=x-coordinate of the right edge of the text window within the speech bubble | ||||||||
29448 | ADD A,6 | |||||||||
29450 | LD HL,32512 | 32512 holds the leftmost column of the skool on screen (0-64) | ||||||||
29453 | SUB (HL) | Return with the carry flag set if the speech bubble is off-screen to the left | ||||||||
29454 | RET C | |||||||||
29455 | CP 32 | Return with the carry flag set if the speech bubble is off-screen to the right | ||||||||
29457 | CCF | |||||||||
29458 | RET C | |||||||||
The speech bubble is on screen.
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29459 | LD C,A | C=screen x-coordinate of the right edge of the text window within the speech bubble (6, 14, 22 or 30) | ||||||||
29460 | LD A,(32613) | A=y-coordinate of the speech bubble lip | ||||||||
29463 | SUB 154 | D=screen y-coordinate of the top row of the speech bubble (0-17) | ||||||||
29465 | LD D,A | |||||||||
29466 | RRCA | Set HL to the display file address corresponding to the top right edge of the text window within the speech bubble | ||||||||
29467 | RRCA | |||||||||
29468 | RRCA | |||||||||
29469 | AND 224 | |||||||||
29471 | ADD A,C | |||||||||
29472 | LD L,A | |||||||||
29473 | LD A,D | |||||||||
29474 | AND 24 | |||||||||
29476 | ADD A,68 | |||||||||
29478 | LD H,A | |||||||||
29479 | LD D,217 | C=width (in pixels) of the message character bitmap | ||||||||
29481 | LD A,(DE) | |||||||||
29482 | LD C,A | |||||||||
Now we enter a loop to slide the pixel columns of the message character bitmap into the text window of the speech bubble.
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29483 | INC D | A=next pixel column of the message character bitmap | ||||||||
29484 | LD A,(DE) | |||||||||
29485 | CALL 29491 | Slide this into the speech bubble text window | ||||||||
29488 | DEC C | Next pixel column | ||||||||
29489 | JR NZ,29483 | Jump back until all pixel columns are done | ||||||||
29491 | PUSH HL | Store the display file address temporarily | ||||||||
29492 | CALL 32216 | Slide the top four pixel rows of the text window one pixel to the left | ||||||||
29495 | LD B,A | Store the message character pixel column in B temporarily | ||||||||
29496 | LD A,L | Set HL to the display file address corresponding to the fifth pixel row down from the top right edge of the text window within the speech bubble | ||||||||
29497 | ADD A,32 | |||||||||
29499 | LD L,A | |||||||||
29500 | JR C,29506 | |||||||||
29502 | LD A,H | |||||||||
29503 | SUB 8 | |||||||||
29505 | LD H,A | |||||||||
29506 | LD A,B | Restore the message character pixel column to A | ||||||||
29507 | CALL 32216 | Slide the bottom four pixel rows of the text window one pixel to the left | ||||||||
29510 | POP HL | Restore the display file address to HL | ||||||||
29511 | XOR A | Reset the carry flag | ||||||||
29512 | RET |
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