Supervisor (Privileged) Instructions
6-58 M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL MOTOROLA
PRESTORE PMMU Restore Function PRESTORE
(MC68851)
MID-COPROCESSOR: This state frame is 44 ($2C) bytes long. A PRESTORE with
this size frame restores the MC68851 to a state with a coprocessor operation
in progress and no breakpoints enabled.
BREAKPOINTS ENABLED: This state frame is 76 ($4C) bytes long. A PRESTORE
with this size state frame restores all breakpoint registers, along with other
states. A coprocessor operation may or may not be in progress.
PMMU Status Register: Set according to restored data.
Instruction Format:
Instruction Fields:
Effective Address field—Specifies the source location. Only control or post-increment
addressing modes can be used as listed in the following table:
1514131211109876543210
1111000101
EFFECTIVE ADDRESS
MODE REGISTER
Addressing Mode Mode Register Addressing Mode Mode Register
Dn — — (xxx).W 111 000
An — — (xxx).L 111 001
(An) 010 reg. number:An # < data > — —
(An) + 011 reg. number:An
—(An) — —
(d
16
,An) 101 reg. number:An (d
16
,PC) 111 010
(d
8
,An,Xn) 110 reg. number:An (d
8
,PC,Xn) 111 011
(bd,An,Xn) 110 reg. number:An (bd,PC,Xn) 111 011
([bd,An,Xn] ,od) 110 reg. number:An ([bd,PC,Xn] ,od) 111 011
([bd,An],Xn ,od) 110 reg. number:An ([bd,PC],Xn ,od) 111 011
Comments to this Manuals