Pokémon mini Development Documentation

EX = Exchange Registers

Hex	Mnemonic	Cycles
C8	EX BA,HL	3
C9	EX BA,IX	3
CA	EX BA,IY	3
CB	EX BA,SP	3
CC	EX A,B	2
CD	EX A,[HL]	3

Execute

A    = (8-bits) Register A
B    = (8-bits) Register B
BA   = (16-bits) Register BA: (B shl 8) or A
HL   = (16-bits) Register HL: (H shl 8) or L
IX   = (16-bits) Register IX
IY   = (16-bits) Register IY
SP   = (16-bits) Register SP (Stack Pointer)
[HL] = (8-bits) Memory: (EP shl 16) or HL

; EX Sc2, Sc
;
; Sc2 = Source 2
; Sc  = Source
; Tr = Temporary Register

Sc2   Sc
   \ /
    x
   / \
Sc2   Sc

Description

“Source” content is exchanged (swapped) with “Source 2”.

Conditions

None

Examples

; BA = 0x1337
; HL = 0xC0D3
EX BA, HL
; BA = 0xC0D3
; HL = 0x1337

; A = 0x45
; B = 0x12
EX A, B
; A = 0x12
; B = 0x45

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