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Routines |
| Prev: C63B | Up: Map | Next: C6A4 |
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Whenever Maroc enters a new room (or moves from a tunnel to a new room), the room number is cross referenced against the current level/area using the lookup table at C6A4.
The paired byte (1-9) indicates which level (7172) Maroc is on. Once identified, the level name is printed on the scroll.
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| C677 | LD A,($EAB7) | Get room number | ||
| C67A | CP $D5 | There are 212 'standard' rooms in the game | ||
| C67C | JR NC,$C6B6 | If the room number is higher, we assume Maroc's in a vertical scrolling tunnel section, so skip the next bit as no scroll message is needed. | ||
| C67E | LD B,$09 | 9 pairs of bytes to check at C6A4 | ||
| C680 | LD HL,$C6A4 | |||
| C683 | LD C,A | Temporary store for room number in C register | ||
| C684 | LD A,(HL) | Get first byte of data banks | ||
| C685 | CP C | |||
| C686 | JR C,$C68C | If current room number > the first byte of the pair, level identified | ||
| C688 | INC HL | Otherwise move to next pair of bytes | ||
| C689 | INC HL | |||
| C68A | DJNZ $C684 | |||
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Level identified from room number
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| C68C | DEC HL | Move pointer back 1 byte to the second byte of previous pair | ||
| C68D | LD A,(HL) | |||
| C68E | LD ($EAC9),A | ...And store. | ||
| C691 | LD HL,($EB5B) | Get address pointer to current game level text at 7172 | ||
| C694 | CALL $E5A5 | Identify the address of the level text to print | ||
| C697 | LD ($EAEA),HL | ...and store. | ||
| C69A | LD A,$00 | Set the character counter to the start of the text (character position 0) | ||
| C69C | LD ($EBC9),A | ...and store. | ||
| C69F | CALL $E58C | Clear the spell message text area on the scroll | ||
| C6A2 | JR $C6B6 | Jump to initialize, set up and draw room items | ||
| Prev: C63B | Up: Map | Next: C6A4 |