Hyundai GMS800 Instruction Manual page 67

XCN
( Exchange nibbles within the accumulator )
Function : A ~A
7 4
Description : Exchange the upper 4bit with the lower 4bit of the accumulator..

Flag :
Mnemonic
XCN
Example :
533 C1C2 C4F0
534 C1C4 CE
XMA
( Exchange memory with accumulator )
Function : ( M )
Description : Exchange the accumulator with the contents of memory.

Flag :
Mnemonic
XMA dp
XMA dp+X
XMA { X }
Example :
539 C1C5 E4F008
540 C1C8 C40F
541 C1CA BC08
XYX
( Exchange Y-register with X-register )

Function : X Y
Description : Exchange the Y-Register with the X-Register.

Flag :
Mnemonic
XYX
Example :
546 C1CC 3EAA
547 C1CE 1E55
548 C1D0 FE
A ~A
3 0
OP Code
CE
LDA
XCN
A
OP Code
BC
AD
BB
LDM
LDA
XMA
OP Code
FE
LDY
LDX
XYX
Bytes Cycles
1 5
#11110000B
Bytes Cycles
2 5
2 6
1 5
TEMP,#11110000B
#00001111B
TEMP
Bytes Cycles
1 4
#10101010B
#01010101B
Instruction Set
63