[destination] ← [source]
MOVEP Dx,(d,Ay)
MOVEP (d,Ay),DxMOVEP D3,(Control,A0)
MOVEP (Input,A6),D5Size word, longword
The MOVEP operation moves data between a data register and a byte-oriented memory mapped peripheral. The data is moved between the specified data register and alternate bytes within the peripheral's address space, starting at the location specified and incrementing by two. This instruction is designed to be used in conjunction with 8-bit peripherals connected to the 68000's 16-bit data bus. The high-order byte of the data register is transferred first and the low-order byte transferred last. The memory address is specified by the address register indirect mode with a 16-bit offset. If the address is even, all transfers are to or from the high-order half of the data bus. If the address is odd, all the transfers are made to the low-order half of the data bus.
Consider a memory-mapped peripheral located at address $08 0001 which has four 8-bit internal registers mapped at addresses $08 0001, $08 0003, $08 0005, and $08 0007. The longword in data register D0 is to be transferred to this peripheral by the following code.
LEA $080001,A0
MOVEP.L D0,0(A0)
This code results in the following actions:
| X | N | Z | V | C |
|---|---|---|---|---|
| - | - | - | - | - |
From MOTOROLA M68000 FAMILY Programmer's reference manual. Copyright 1992 by Motorola Inc./NXP. Adapted with permission.