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Routines |
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Called from the main loop at 25129.
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26276 | LD HL,(31853) | Pick up Horace's new location. | ||||||
26279 | CALL 27680 | Check the attribute bytes at Horace's new location. | ||||||
26282 | CP 59 | Has Horace run into a guard? | ||||||
26284 | RET NZ | Return if not. | ||||||
26285 | LD HL,(28078) | Pick up the guard panic timer. | ||||||
26288 | LD A,H | Are the guards panicking at the moment? | ||||||
26289 | OR L | |||||||
26290 | JP Z,26426 | Jump if not. | ||||||
26293 | LD HL,(31859) | Add 100 to the score (Horace has thrown the guards out of the park). | ||||||
26296 | LD BC,100 | |||||||
26299 | ADD HL,BC | |||||||
26300 | LD (31859),HL | |||||||
26303 | CALL 26055 | Print the score. | ||||||
26306 | LD HL,0 | Reset the guard panic timer. | ||||||
26309 | LD (28078),HL | |||||||
26312 | LD HL,31849 | Pick up the sound on/off indicator. | ||||||
26315 | LD C,15 | Initialise C for the loop that follows. | ||||||
26317 | PUSH BC | Save the loop counter (unnecessarily). | ||||||
26318 | LD A,C | Set B and E equal to 8*(15-C). This value determines the pitch. | ||||||
26319 | XOR 15 | |||||||
26321 | LD B,A | |||||||
26322 | SLA B | |||||||
26324 | SLA B | |||||||
26326 | SLA B | |||||||
26328 | LD E,B | |||||||
26329 | LD D,8 | This value determines the duration. | ||||||
26331 | LD B,E | Produce a sound (if the sound on/off indicator is on) with pitch and duration determined by E and D. | ||||||
26332 | LD A,31 | |||||||
26334 | AND (HL) | |||||||
26335 | OUT (254),A | |||||||
26337 | LD A,(IX+0) | |||||||
26340 | LD (IX+0),A | |||||||
26343 | DJNZ 26337 | |||||||
26345 | LD A,7 | |||||||
26347 | OUT (254),A | |||||||
26349 | LD B,E | |||||||
26350 | LD A,(IX+0) | |||||||
26353 | LD (IX+0),A | |||||||
26356 | DJNZ 26350 | |||||||
26358 | DEC D | |||||||
26359 | JR NZ,26331 | |||||||
26361 | POP BC | Restore the loop counter to C (unnecessarily). | ||||||
26362 | DEC C | Finished yet? | ||||||
26363 | JR NZ,26317 | Jump back if not. | ||||||
Now we throw the guards out of the park.
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26365 | LD HL,28070 | Point HL at the first guard countdown timer. | ||||||
26368 | LD B,4 | There are four guards. | ||||||
26370 | PUSH BC | Save the guard counter. | ||||||
26371 | LD A,(HL) | Set the zero flag if this guard is already in play. | ||||||
26372 | INC HL | |||||||
26373 | OR (HL) | |||||||
26374 | PUSH HL | Save the guard countdown timer pointer. | ||||||
26375 | JR NZ,26421 | Jump if this guard has not appeared yet. | ||||||
26377 | CALL 27199 | Copy this guard's buffer into the temporary location (28088). | ||||||
26380 | CALL 25960 | Redraw the tiles behind the guard. | ||||||
26383 | LD HL,(31853) | Pick up Horace's new location. | ||||||
26386 | CALL 27680 | Check the attribute bytes at this location. | ||||||
26389 | CP 59 | Set the zero flag if there's a guard here. (This instruction is redundant.) | ||||||
26391 | LD HL,(28629) | Pick up the entrance location for the current maze. | ||||||
26394 | LD (28088),HL | Make this the guard's new location. | ||||||
26397 | LD (28092),HL | |||||||
26400 | CALL 27752 | Copy the maze background tiles into the temporary guard buffer. | ||||||
26403 | LD A,1 | Initialise the guard's animation frame. | ||||||
26405 | LD (28090),A | |||||||
26408 | LD A,90 | Initialise the guard's return delay counter. | ||||||
26410 | LD (28094),A | |||||||
26413 | JR 26418 | |||||||
26415 | CALL 26173 | Draw the guard (this instruction is never executed). | ||||||
26418 | CALL 27242 | Copy the guard's buffer back to the original location. | ||||||
26421 | POP HL | Restore the guard countdown timer pointer to HL. | ||||||
26422 | POP BC | Restore the guard counter to B. | ||||||
26423 | DJNZ 26370 | Jump back to deal with the next guard. | ||||||
26425 | RET |
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