Motorola MC68340 User Manual page 217

space accessed. Only absolute addressing is supported. Valid data sizes include byte,
word, and long word.
Command Format:
15 14 13 12
0 0 0 1
Command Sequence:
WRITE (B/W)
??? "NOT READY"
WRITE (LONG)
???
Operand Data:
Two operands are required for this instruction. The first operand is a long-word absolute
address that specifies a location to which the operand data is to be written. The second
operand is the data. Byte data is transmitted as a 16-bit word, justified in the least
significant byte; 16- and 32-bit operands are transmitted as 16 and 32 bits, respectively.
Result Data:
Successful write operations return a status of $0FFFF. Bus or address errors on the
write cycle are indicated by the assertion of bit 16 in the status message and by a data
pattern of $0001.
5.6.2.8.10 Dump Memory Block (DUMP). DUMP is used in conjunction with the READ
command to dump large blocks of memory. An initial READ is executed to set up the
5-80
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11 10 9 8
1 0 0 0
MS ADDR LS ADDR
"NOT READY"
XXX NEXT CMD
"ILLEGAL" "NOT READY"
MS ADDR LS ADDR
"NOT READY" "NOT READY"
XXX NEXT CMD
"ILLEGAL"
"NOT READY"
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7 6 5
OP SIZE 0
WRITE
DATA
MEMORY
"NOT READY"
LOCATION
MS DATA
"NOT READY"
WRITE
LS DATA
MEMORY
"NOT READY"
LOCATION
4 3 2 1
0 0 0 0
XXX
"NOT READY"
XXX
NEXT CMD
"CMD COMPLETE"
XXX
BERR/AERR
NEXT CMD
"NOT READY"
XXX
"NOT READY"
NEXT CMD XXX
"CMD COMPLETE"
XXX
BERR/AERR
NEXT CMD
"NOT READY"
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