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Routines |
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Used by the routine at Extra_Life_Flash.
Advances the extra life colour flash display by one step. Scans all 768 attribute cells and replaces each colour with its successor in the cycle table at Flash_Colour_Cycle_Table, rotating the screen through blue, green, cyan, white, yellow, magenta, and red on successive calls.
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| Advance_Flash_Colour_Cycle | F5BB | LD DE,$5800 | Point to the start of the attribute area. | |
| Advance_Flash_Colour_Cycle_Scan | F5BE | LD A,(DE) | Read the current attribute cell colour. | |
| F5BF | LD HL,$F5D2 | Point to the colour cycle table. | ||
| F5C2 | LD BC,$0007 | Set the cycle table scan length. | ||
| F5C5 | CPIR | Scan the table for a matching colour entry. | ||
| F5C7 | JR NZ,Advance_Flash_Colour_Cycle_Next | Jump to Advance_Flash_Colour_Cycle_Next if no matching entry was found. | ||
| F5C9 | LD A,(HL) | Replace the attribute cell with the next colour in the cycle. | ||
| F5CA | LD (DE),A | |||
| Advance_Flash_Colour_Cycle_Next | F5CB | INC DE | Advance to the next attribute cell. | |
| F5CC | LD A,D | Loop back until the entire attribute area has been processed. | ||
| F5CD | CP $5B | |||
| F5CF | JR NZ,Advance_Flash_Colour_Cycle_Scan | |||
| F5D1 | RET | Return. | ||
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