NEC PD754144 - Manual (Page 260)

CHAPTER 11 INSTRUCTION SET
260 User’s Manual U10676EJ3V0UM
XCH XA, @HL
Function: A ↔ (HL), X ↔ (HL+1)
Exchanges the contents of the A register with the contents of the data memory addressed by register pair HL, and
the contents of the X register with the contents of the next address.
If the contents of the L register are an odd number, however, an address whose least significant bit is ignored is
specified.
XCH A, mem
Function: A ↔ (mem) mem = D
7-0
: 00H to FEH
Exchanges the contents of the A register with the contents of the data memory addressed by 8-bit immediate data
mem.
XCH XA, mem
Function: A ↔ (mem), X ↔ (mem+1) mem = D
7-0
: 00H to FEH
Exchanges the contents of the A register with the data memory contents addressed by 8-bit immediate data mem,
and the contents of the X register with the contents of the next memory address.
The address that can be specified by mem is an even address.
XCH A, reg1
Function: A ↔ reg1
Exchanges the contents of the A register with the contents of register reg1 (X, H, L, D, E, B, or C).
XCH XA, rp’
Function: XA ↔ rp’
Exchanges the contents of register pair XA with the contents of register pair rp’ (XA, HL, DE, BC, XA’, HL’, DE’,
or BC’).