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Routines |
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Used by the routines at CompareLocationData and CompareFollowingFields.
Reads a pair of bytes and reports whether the low digit matches the script.
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| ReadScriptPosition | 42267 | PUSH HL | Go to ReadScriptPosition_MoveOneByte if both bytes of this word are zero. | |
| 42268 | LD A,(HL) | |||
| 42269 | INC HL | |||
| 42270 | OR (HL) | |||
| 42271 | JR Z,ReadScriptPosition_MoveOneByte | |||
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Does the low nibble of IY+1 differ from the script byte at HL?
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| 42273 | LD A,(IY+1) | Jump to ReadScriptPosition_MoveOneByte when the low nibble of IY+1 differs from the script byte at HL. | ||
| 42276 | XOR (HL) | |||
| 42277 | AND 15 | |||
| 42279 | JR NZ,ReadScriptPosition_MoveOneByte | |||
| 42281 | DEC HL | Step back one script byte and compare it with this schedule field. | ||
| 42282 | LD A,(HL) | |||
| 42283 | CP (IY+0) | |||
| ReadScriptPosition_MoveOneByte | 42286 | POP HL | Move one byte onward and restore the pointer saved for this step. | |
| 42287 | INC HL | |||
| 42288 | INC HL | Advance through the script. | ||
| 42289 | INC IY | Step to the next field of the schedule entry. | ||
| 42291 | INC IY | Step to the next field of the schedule entry. | ||
| 42293 | RET | Return. | ||
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View the equivalent code in;
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