Motorola CPU32 Reference Manual page 159

III
MOVEM
Move Multiple Registers
MOVEM
For memory-to-register transfers, only control addressing modes or the postincrement addressing
mode are allowed as shown:
Addressing Mode Mode Register Addressing Mode Mode Register
On
- -
(xxx).W 111 000
An
- -
(xxx).L 111 001
(An) 010 Reg. number: An
#(data) -
-
(An)
+ 011 Reg. number: An
-(An)
- -
(d16, An) 101 Reg. number: An (d16, PC)
111 010
(de, An, Xn)
110 Reg. number: An
(d
s ,
PC, Xn)
111 011
(bd, An, Xn) 110 Reg. number: An (bd, PC, Xn) 111 011
Register List Mask field - Specifies the registers to be transferred. The low-order bit
corresponds to the first register to be transferred; the high-order bit corresponds to the last
register to be transferred. Thus, both for control modes and for the postincrement mode
addresses, the mask correspondence is:
15 14 13 12 11 10 9 8 7 6 5 4 3
2
o
I
A7
I
A6
I
A5
I
A4
I
A3
I
A2
I
A1
I
AO
I
07 06
05 04 03 02 01
DO
For predecrement mode addresses, the mask correspondence is reversed:
15 14 13 12 11 10
9 8 7 6 5 4
3 2
o
DO
01 02 03 04 05
06 07
I
AO
I
A1 A2 A3 A4 A5 A6 A7
MOTOROLA
4-106
NOTE
An extra read bus cycle occurs for memory operands. This accesses an operand
at one address higher than the last register image required.
INSTRUCTION SET
CPU32 REFERENCE MANUAL