CALL (HL)
CALL (IX)
CALL (IY)     Call Subroutine     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
ED EA	CALL (HL)	12 (2,2,2,3,3)	(SP - 1) = PChigh (SP - 2) = PClow PC = HL; SP = SP - 2
DD EA	CALL (IX)	12 (2,2,2,3,3)	(SP - 1) = PChigh (SP - 2) = PClow PC = IX; SP = SP - 2
FD EA	CALL (IY)	12 (2,2,2,3,3)	(SP - 1) = PChigh (SP - 2) = PClow PC = IY; SP = SP - 2

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
-	-	-	-

Description

This instruction is used to call a subroutine. First PC is pushed onto the stack. The high-order byte of PC is pushed first, then the low-order byte. PC is then loaded with the value in HL, IX or IY, the 16-bit address of the first instruction of the subroutine. SP is updated to reflect the two bytes pushed onto the stack.