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Routines |
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Used by the routine at GameLoop.
Clears the screen, forgets the previous command and copies the initial object locations and state into place.
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The text window sits on rows 22 and 23 until a location description moves it.
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| PrepareGame | 24591 | LD A,23 | The text window uses rows 22 and 23. | |
| 24593 | LD (23447),A | |||
| 24596 | LD A,22 | The cursor starts on row 22. | ||
| 24598 | LD (23433),A | |||
| 24601 | CALL HomeRow | Call HomeRow to home that row. | ||
| 24604 | XOR A | Column 0. | ||
| 24605 | LD (23434),A | |||
| 24608 | CALL ClearScreen | Call ClearScreen to blank the display. | ||
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Forget the verb, the noun and the three counters.
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| 24611 | LD HL,23423 | Point at the five command bytes at Verb. | ||
| 24614 | LD B,5 | Five bytes: the verb, the noun and the three counters. | ||
| PrepareGame_ClearCommand | 24616 | LD (HL),0 | Clear one byte and step on. | |
| 24618 | INC HL | |||
| 24619 | DJNZ PrepareGame_ClearCommand | |||
| 24621 | XOR A | There is no comma left over from a previous game. | ||
| 24622 | LD (23429),A | |||
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A new game starts in room 0 with empty flags, then the authored state is copied in.
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| 24625 | LD HL,23943 | Point at the state and flag area at CurrentRoom. | ||
| 24628 | LD B,65 | 65 bytes, through the last flag. | ||
| PrepareGame_ClearState | 24630 | LD (HL),0 | Clear one byte and step on. | |
| 24632 | INC HL | |||
| 24633 | DJNZ PrepareGame_ClearState | |||
| 24635 | LD HL,46760 | Copy the initial object locations from InitialObjects. | ||
| 24638 | LD DE,24010 | |||
| 24641 | LD BC,256 | |||
| 24644 | LDIR | |||
| 24646 | LD HL,24658 | Copy the six initial state bytes from InitialState onto Darkness. | ||
| 24649 | LD DE,23944 | |||
| 24652 | LD BC,6 | |||
| 24655 | LDIR | |||
| 24657 | RET | Return. | ||
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