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Routines |
| Prev: BC7A | Up: Map | Next: BCB4 |
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Used by the routine at PrintTextSingleColour.
Prints each character of a line of text and sets the attribute of its cell. DE' holds the colour, HL' holds the address in the attribute file, and HL holds the address in the screen buffer.
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Find the attribute address.
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| PrintText | BC8B | EXX | Switch to the shadow registers. | |
| BC8C | POP HL | Fetch the pixel position. | ||
| BC8D | PUSH DE | Stash the address of the text on the stack. | ||
| BC8E | CALL CalculateAttributeAddress | Call CalculateAttributeAddress. | ||
| BC91 | LD L,E | Copy it to HL'. | ||
| BC92 | LD H,D | |||
| BC93 | POP DE | Restore the address of the text from the stack. | ||
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Print each character and set its attribute.
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| PrintText_Next | BC94 | EXX | Switch back to the main registers. | |
| BC95 | LD A,(DE) | Fetch a character of the text. | ||
| BC96 | BIT 7,A | Jump to PrintText_Last if it is the last. | ||
| BC98 | JR NZ,PrintText_Last | |||
| BC9A | PUSH DE | Stash the address of the text on the stack. | ||
| BC9B | CALL PrintCharacter | Call PrintCharacter. | ||
| BC9E | POP DE | Restore the address of the text from the stack. | ||
| BC9F | INC DE | Move on to the next character. | ||
| BCA0 | EXX | Switch to the shadow registers. | ||
| BCA1 | EX AF,AF' | Fetch the attribute. | ||
| BCA2 | LD (HL),A | Set the attribute of the cell. | ||
| BCA3 | INC L | Move on to the next cell. | ||
| BCA4 | EX AF,AF' | Keep the attribute in AF'. | ||
| BCA5 | JR PrintText_Next | Jump to PrintText_Next. | ||
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Print the last character.
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| PrintText_Last | BCA7 | AND %01111111 | Keep only bits 0 to 6. | |
| BCA9 | PUSH DE | Stash the address of the text on the stack. | ||
| BCAA | CALL PrintCharacter | Call PrintCharacter. | ||
| BCAD | POP DE | Restore the address of the text from the stack. | ||
| BCAE | INC DE | Move on past the text. | ||
| BCAF | EXX | Switch to the shadow registers. | ||
| BCB0 | EX AF,AF' | Fetch the attribute. | ||
| BCB1 | LD (HL),A | Set the attribute of the last cell. | ||
| BCB2 | EXX | Switch back to the main registers. | ||
| BCB3 | RET | Return. | ||
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