MOVE Peripheral data
NAME
MOVEP -- Move peripheral data
SYNOPSIS
MOVEP Dx,(d,Ay)
MOVEP (d,Ay),Dx
Size = (Word, Long)
FUNCTION
Data is transfered between a data register and ever-other
byte of memory at the selected address.
Transfer is made between a data register and alterned bytes of memory
at the selected address, must be specified in indirect mode to An with
a 16 bits displacement.
This instruction is of use with 8 bits peripheral programing.
Example:
~~~~~~~
LEA port0,A0 ; A0 -> $FFFFFFFFFFFFFFFF
MOVEQ #0,D0
MOVEP.L D0,(0,A0) ; A0 -> $FF00FF00FF00FF00
MOVE.L #$55554444,D0
MOVEP.L D0,(1,A0) ; A0 -> $FF55FF55FF44FF44
FORMAT
-----------------------------------------------------------------
|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|-----------|-----------|---|---|---|-----------|
| 0 | 0 | 0 | 0 |Dx REGISTER| OP-MODE | 0 | 0 | 1 |Ay REGISTER|
|---------------------------------------------------------------|
| 16 BITS OFFSET |
-----------------------------------------------------------------
OP-MODE
100->16 bits move, memory to register
101->32 bits move, memory to register
110->16 bits move, register to memory
111->32 bits move, register to memory
REGISTER
Dx register specifies the number of data register.
Ay register specifies the number of address register which takes place
in indirect addressing with displacement.
RESULT
None.
SEE ALSO
MOVEM
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Patch level: 36
& witbrock@cs.cmu.edu