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Routines |
| Prev: A0DB | Up: Map | Next: A149 |
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Used by the routines at PrintTextRepeatedly, CompletePlanet, AddToScore, PrintShipsRemaining, PrintPlayer and GameOver.
Prints a line of text. The text is held in a record made of the horizontal pixel position, the vertical pixel position, the attribute, the number of characters and then the characters. Bit 7 of the attribute makes the text wide.
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| PrintText | A115 | XOR A | Select normal characters. | ||||||||||
| A116 | LD ($A0CA),A | Change the instruction at PrintCharacter_Mode to match. | |||||||||||
| A119 | LD A,(DE) | Fetch the horizontal position. | |||||||||||
| A11A | LD L,A | ||||||||||||
| A11B | INC DE | Move on to the vertical position. | |||||||||||
| A11C | LD A,(DE) | Fetch the vertical position. | |||||||||||
| A11D | LD H,A | Move on to the attribute. | |||||||||||
| A11E | INC DE | Save the address of the attribute. | |||||||||||
| A11F | PUSH DE | Save the position. | |||||||||||
| A120 | PUSH HL | Find the screen address. | |||||||||||
| A121 | CALL GetScreenAddress | ||||||||||||
| A124 | EXX | Switch to the attribute registers. | |||||||||||
| A125 | POP HL | Restore the position. | |||||||||||
| A126 | CALL AttributeAddress | Find the attribute address. | |||||||||||
| A129 | POP DE | Restore the address of the attribute. | |||||||||||
| A12A | LD A,(DE) | Fetch the attribute. | |||||||||||
| A12B | BIT 7,A | Jump to PrintText_Attribute if the text is not wide. | |||||||||||
| A12D | JR Z,PrintText_Attribute | ||||||||||||
| A12F | LD A,$10 | Select wide characters. | |||||||||||
| A131 | LD ($A0CA),A | Change the instruction at PrintCharacter_Mode to match. | |||||||||||
| A134 | LD A,(DE) | Fetch the attribute again. | |||||||||||
| A135 | AND %01111111 | Remove the flag. | |||||||||||
| A137 | LD DE,$0020 | Set the offset between rows of attributes. | |||||||||||
| PrintText_Attribute | A13A | LD B,A | Store the attribute. | ||||||||||
| A13B | EXX | Switch back to the screen registers. | |||||||||||
| A13C | INC DE | Move on to the number of characters. | |||||||||||
| A13D | LD A,(DE) | Fetch it. | |||||||||||
| A13E | LD B,A | Store it in B. | |||||||||||
| PrintText_Loop | A13F | PUSH BC | Save the number of characters. | ||||||||||
| A140 | INC DE | Move on to the next character. | |||||||||||
| A141 | CALL PrintCharacter | Print the character. | |||||||||||
| A144 | POP BC | Restore the number of characters. | |||||||||||
| A145 | DJNZ PrintText_Loop | Loop back to PrintText_Loop for each character. | |||||||||||
| A147 | INC DE | Move on to the byte after the record. | |||||||||||
| A148 | RET | Return. | |||||||||||
| Prev: A0DB | Up: Map | Next: A149 |
