
CPU32+
MOTOROLA
MC68360 USER’S MANUAL
5-73
Command Sequence:
Operand Data:
The data to be written into the register is always supplied as a 32-bit long word. If the reg-
ister is less than 32 bits, the least significant word is used.
Result Data:
“Command complete” status is returned when register write is complete.
Register Field:
The system control register is specified by the register field (see
Table 5-24). The FAR is
a read-only register—any write to it is ignored.
5.6.2.8.8 Read Memory Location (READ). Read the sized data at the memory location
specified by the long-word address. Only absolute addressing is supported. The SFC regis-
ter determines the address space accessed. Valid data sizes include byte, word, or long
word.
Command Format:
Command Sequence:
Operand Data:
The single operand is the long-word address of the requested memory location.
15
14
13
12
11
10
9876543210
00011001
OP SIZE
000000
MS DATA
XXX
"ILLEGAL"
LS DATA
"NOT READY"
NEXT CMD
"NOT READY"
"CMD COMPLETE"
NEXT CMD
WSREG
???
"NOT READY"
MS ADDR
"NOT READY"
XXX
"ILLEGAL"
LS ADDR
"NOT READY"
NEXT CMD
"NOT READY"
READ (B/W)
???
NEXT CMD
"NOT READY"
XXX
"NOT READY"
NEXT CMD
RESULT
XXX
BERR/AERR
READ
MEMORY
LOCATION
MS ADDR
"NOT READY"
XXX
"ILLEGAL"
LS ADDR
"NOT READY"
NEXT CMD
"NOT READY"
READ (LONG)
???
NEXT CMD
XXX
"NOT READY"
MS RESULT
XXX
BERR/AERR
READ
MEMORY
LOCATION
XXX
NEXT CMD
LS RESULT
"NOT READY"