EX JK,HL
EX JK',HL     Exchange     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
B9	EX JK,HL	2	if (!ALTD) then JK <-> HL else JK <-> HL'
ED 7C	EX JK',HL	4 (2,2)	if (!ALTD) then JK' <-> HL else JK' <-> HL'

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

Description

Exchanges JK or JK' with HL. If the instruction is preceded by ALTD, the alternate register HL' is used instead of HL.

The Dynamic C assembler recognizes the following instructions, which are based on a combination of ALTD and the above exchange operations:

• EX JK',HL'      ; equivalent to ALTD EX JK',HL

• EX JK,HL'       ; equivalent to ALTD EX JK',HL'