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Routines |
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Used by the routine at GameOver_Start.
Turns one decimal digit of the score into ASCII, counting up from '0'.
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Converts e.g. "0075" into "7.5" in ASCII for display purposes.
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| PercentageAscii | 33838 | LD A,47 | Start the quotient digit one below '0'. | |
| PercentageAscii_Loop | 33840 | INC A | Count the digit up by one. | |
| 33841 | AND A | Clear carry for the subtraction. | ||
| 33842 | SBC HL,DE | Subtract the power of ten in DE from HL. | ||
| 33844 | JR NC,PercentageAscii_Loop | Jump back to PercentageAscii_Loop to count another digit unless the subtraction went below zero. | ||
| 33846 | ADD HL,DE | Add the power of ten back to leave the remainder. | ||
| 33847 | CP 48 | Compare against 48 (ASCII "0") to set flags for the return. | ||
| 33849 | RET | Return. | ||
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Reached through the special-key table at 33393, dispatched from Command_MatchASpecialKey.
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| 33850 | LD A,4 | Set the border to 4 (green). | ||
| 33852 | OUT (254),A | |||
| 33854 | CALL DebounceAnyKey | Call DebounceAnyKey to debounce keyboard. | ||
| Wait_ForKey | 33857 | XOR A | Read from the keyboard port. | |
| 33858 | IN A,(254) | |||
| 33860 | AND %00011111 | Keep bits 0-4, one for each key in the half-row. XOR A then IN A,(254) reads every half-row at once, and a pressed key reads as a reset bit. | ||
| 33862 | CP 31 | Loop back to Wait_ForKey while a key is being pressed. | ||
| 33864 | JR NZ,Wait_ForKey | |||
| 33866 | LD A,7 | Set the border to 7 (white). | ||
| 33868 | OUT (254),A | |||
| 33870 | JP CommandDispatchAControl | Jump back to CommandDispatchAControl to dispatch a control. | ||
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