Rex (Side A): Routine at C0E0

C0E0: Handle collision detection for BLOB

Used by the routine at C14D.
C0E0	LD A,(IX+$01)	if y-position for BLOB greater than $A0 and less than $10 then jump to change movement
C0E3	CP $A0
C0E5	JP NC,$C119
C0E8	CP $10
C0EA	JP C,$C119
C0ED	LD A,(IX+$00)	if x-position for BLOB greater then $F0 and less than $10 then jump to change movement
C0F0	CP $F0
C0F2	JP NC,$C119
C0F5	CP $10
C0F7	JP C,$C119
C0FA	LD A,(IX+$00)	Set A0AF the new x-position based on x-delta
C0FD	ADD A,(IX+$04)
C100	LD ($A0AF),A
C103	LD A,(IX+$01)	Set A0B0 the new y-position based on y-delta
C106	ADD A,(IX+$05)
C109	LD ($A0B0),A
C10C	LD A,(IX+$02)	Set A to the direction of BLOB
C10F	CALL $A503	Computes into HL address of tile buffer for the tile under BLOB
C112	LD DE,$0021
C115	ADD HL,DE
C116	LD A,(HL)	Check tile type
C117	OR A	Return if tile is background
C118	RET Z	Return if tile is background
C119	LD A,(IX+$04)	Invert x-delta
C11C	NEG
C11E	LD (IX+$04),A
C121	LD A,(IX+$05)	Invert y-delta
C124	NEG
C126	LD (IX+$05),A
C129	LD (IX+$11),$04	Reset state change counter
C12D	RET