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Routines |
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Used by the routine at ClearCoordinateBuffer.
Points at the co-ordinate data and skips the token check when the next pair is empty.
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| ReadBytePointer | AC94 | LD HL,$AAAE | Use the buffer: co-ordinate data (Buffer_CoordinateData+02). | |
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This entry point is used by the routine at PointPictureOrigin.
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| ReadBytePointer_CheckToken | AC97 | LD A,(HL) | Go to ReadBytePointer_0 if this word is zero. | |
| AC98 | INC HL | |||
| AC99 | OR (HL) | |||
| AC9A | JR Z,ReadBytePointer_0 | |||
| AC9C | INC HL | Advance through the text. | ||
| AC9D | LD A,(HL) | Read the co-ordinate stored at the pointer. | ||
| AC9E | INC HL | Advance through this record. | ||
| AC9F | OR (HL) | Merge the next co-ordinate into the pair. | ||
| ACA0 | RET NZ | Return when the co-ordinate pair is not empty. | ||
| ReadBytePointer_0 | ACA1 | LD (HL),B | Store B at the second byte of this word. | |
| ACA2 | DEC HL | Step back to the first byte. | ||
| ACA3 | LD (HL),C | Store C there. | ||
| ACA4 | XOR A | Clear A, as the pair was empty and has now been filled from BC. | ||
| ACA5 | RET | Return. | ||
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View the equivalent code in;
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