ZiLOG eZ80

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
145
EX (SP), HL
Exchange Stack and HL Register
Operation
if ADL = 1 {
(SPL) ↔ HL[7:0]
(SPL+1) ↔ HL[15:8]
(SPL+2) ↔ HL[23:16]
}
else if ADL = 0 {
SPS ↔ HL[7:0]
(SPS+1) ↔ HL[15:8]
}
Description
The CPU exchanges the contents of the multibyte CPU register HL with the contents of
the memory location specified by the Stack Pointer (
SP ). In ADL mode, or when the .L
suffix is employed, SPL is used for SP . In Z80 mode, or when the .S suffix is employed,
SPS is used for
SP .
Condition Bits Affected
None.
Attributes
Mnemonic Operand ADL Mode Cycle Opcode (hex)
EX (SP),HL 0/1 5/7 E3
EX.S (SP),HL 1 6 52, E3
EX.L (SP),HL 0 8 49, E3