Avalon: Routine at D7F3

D7F3: Check which spell has been cast

Follows the previous routine at D794.
Check which (if any) spell, or spell type, has been cast/activated (rather than merely selected) - using spell number - from the spells list at 6DFC and stored at EAEC.
D7F3	LD A,($EAEC)
D7F6	CP $00	No spell cast, or MOVE spell in effect
D7F8	JP Z,$D901	No spell cast, or MOVE spell in effect
D7FB	CP $01	SERVANT spell
D7FD	JR Z,$D833	SERVANT spell
D7FF	CP $08	HAIL spell
D801	JP Z,$D8CE	HAIL spell
D804	CP $0C	WAYSTONE spell
D806	JP Z,$D8D5	WAYSTONE spell
D809	CP $10	FREEZE spell
D80B	JP Z,$D8E2	FREEZE spell
D80E	CP $11	SUMMON spell
D810	JP Z,$D8E9	SUMMON spell
D813	CP $13	PORTAL spell
D815	JP Z,$D8F0	PORTAL spell
Maroc has cast some other spell:
D818	LD A,($EBC7)	Check the type of spell cast
D81B	CP $02	Spell type 2 = spell that generates a controllable graphic, e.g. SERVANT, MISSILE, OPEN
D81D	JP NZ,$D901	If not one of these spell types, skip out of this routine for other checks
Spell has been cast that involves a controllable cursor: Bit 7 of the spell info byte at EBCA, if set, tells us this is a missile/bolt aiming cursor If not set, it's a spell whose cursor position will need checking for room events/collisions (SERVANT, OPEN, REVEAL etc.)
D820	LD A,($EBCA)	Get byte indicating spell cursor type
D823	CP $00	If not active, can skip to next routine
D825	JP Z,$D901	If not active, can skip to next routine
D828	LD C,A	Otherwise, temp store this value in the C register
D829	AND $80	Bit 7 of this byte is set for bolt spells (MISSILE, FIREBALL etc.)
D82B	CP $00
D82D	JP Z,$D8B2	If NOT set, it's another sort of aiming cursor, so can jump out here and deal with this spell's potential event/collision actions
D830	JP $D901	If set, it's a bolt/missile type spell, fine to jump out of this routine