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Routines |
| Prev: $917F | Up: Map | Next: $91FF |
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Used by the routine at $98E8.
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| $91E8 | LDY #$0E | Bits 0-7 of the x-coordinate of sprite #7 is at $D00E. | ||||||
| $91EA | TXA | Compensate for the TAX instruction coming next. | ||||||
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This entry point is used by the routine at $92E8.
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| $91EB | TAX | Transfer bit 8 of the sprites' x-coordinates to X. | ||||||
| $91EC | DEY | Decrease Y by 2 to point at bits 0-7 of the x-coordinate of the next sprite. | ||||||
| $91ED | DEY | |||||||
| $91EE | BPL $91F6 | Branch if Y is still non-negative. | ||||||
| $91F0 | STX $D010 | Update bit 8 of the sprites' x-coordinates. | ||||||
| $91F3 | JMP $9877 | Enable sprites #0-#6. | ||||||
| $91F6 | STY $92E9 | Modify the LSB of the operand of the 'LDA nnnn' instruction at $92E8. | ||||||
| $91F9 | STY $92EF | Modify the LSB of the operand of the 'STA nnnn' instruction at $92EE. | ||||||
| $91FC | JMP $92E8 | Continue at $92E8. | ||||||
| Prev: $917F | Up: Map | Next: $91FF |