Avalon: Routine at D8B2

event checking while the servant spell is active

event checking while a cursor aiming spell is active

Follows previous SERVANT routine - these instructions are run if the servant ISN'T moving over Maroc, and ISN'T holding an object.

In this state, the servant sprite needs to be open to room event checks (e.g. picking up/manipulating objects). So this routine creates an entry in the room's event checks data table at 7FB3.

There's also a jump here from the routine at D82D, which relates to other cast spells that involve the controllable cursor (e.g. OPEN, FIND, REVEAL) that aren't missile-related. These spells will also need an event check to be added to the room event check table, as they take effect when they're moved over specific room items.

Used by the routines at D7F3 and D833.
Follows previous SERVANT routine - these instructions are run if the servant ISN'T moving over Maroc, and ISN'T holding an object. In this state, the servant sprite needs to be open to room event checks (e.g. picking up/manipulating objects). So this routine creates an entry in the room's event checks data table at 7FB3. There's also a jump here from the routine at D82D, which relates to other cast spells that involve the controllable cursor (e.g. OPEN, FIND, REVEAL) that aren't missile-related. These spells will also need an event check to be added to the room event check table, as they take effect when they're moved over specific room items.
D8B2	LD HL,($EAAD)	Address pointer to room item event data at 7FB3
D8B5	LD (HL),$01	Set the first byte of the set to 1, which means the event will be checked for 1 game cycle (this is partly in case items are moving around).
D8B7	INC HL
D8B8	LD A,($EBCA)	Action/event value associated with this spell (e.g. SERVANT, OPEN) is active
D8BB	LD (HL),A	Store as byte 2 of set
D8BC	INC HL	Store as byte 2 of set
D8BD	LD A,($EB00)	Servant sprite horizontal (X) co-ordinate in pixels
D8C0	LD (HL),A	Store as byte 3 of set
D8C1	INC HL	Store as byte 3 of set
D8C2	LD A,($EAFF)	Servant sprite horizontal (Y) co-ordinate in pixels
D8C5	LD (HL),A	Store as byte 4 of set
D8C6	INC HL	Move along to the start of the next data set
D8C7	LD ($EAAD),HL	Store the address pointer to the start of the next event data set at 7FB3
D8CA	LD (HL),$FF	Set an end-of-data marker
Jump from previous routine if there aren't any events to check. For example, the servant can't manipulate other room objects if it's already carrying an object (the event check in this case is object 1 on object 2).
D8CC	JR $D901