|
Routines |
| Prev: A1D3 | Up: Map | Next: A219 |
|
Draws consecutive tiles left to right, writing one attribute byte per cell as it goes. It keeps the display address and the attribute address live at the same time in the two register banks, swapping with EXX between the pixel write and the colour write rather than recomputing either.
|
||||||||||
| PRINT_STRING | A1F3 | PUSH HL | ||||||||
| A1F4 | CALL PIXEL_TO_SCREEN | Display address into the main bank... | ||||||||
| A1F7 | LD A,(DE) | The first byte is the colour, not a character; it is kept in A' for the whole run. | ||||||||
| A1F8 | EX AF,AF' | |||||||||
| A1F9 | INC DE | |||||||||
| A1FA | EXX | |||||||||
| A1FB | POP HL | |||||||||
| A1FC | CALL PIXEL_TO_ATTR | ...and the attribute address into the alternate one. | ||||||||
|
This entry point is used by the routine at PRINT_MENU_LINE.
|
||||||||||
| PRINT_STRING_REST | A1FF | EXX | } | |||||||
| A200 | LD A,(DE) | |||||||||
| A201 | BIT 7,A | Bit 7 is the end marker, not part of the code. | ||||||||
| A203 | JR NZ,PRINT_STRING_0 | |||||||||
| A205 | CALL PLOT_TILE | |||||||||
| A208 | INC DE | |||||||||
| A209 | EXX | |||||||||
| A20A | EX AF,AF' | |||||||||
| A20B | LD (HL),A | Colour the cell PLOT_TILE just drew into. | ||||||||
| A20C | INC L | |||||||||
| A20D | EX AF,AF' | |||||||||
| A20E | JR PRINT_STRING_REST | |||||||||
| PRINT_STRING_0 | A210 | AND $7F | Strip the end marker before drawing the final character. | |||||||
| A212 | CALL PLOT_TILE | |||||||||
| A215 | EXX | |||||||||
| A216 | EX AF,AF' | |||||||||
| A217 | LD (HL),A | |||||||||
| A218 | RET | |||||||||
| Prev: A1D3 | Up: Map | Next: A219 |