Sharp JW-21MN manual Reading system memory, Writing system memory, 10-6

10

[5] Reading system memory

Read the specified number of bytes of data from the specified address in system memory. [Write mode assignment]: None

[Communication format]

Command

"+"

"C"

"L"

"A"

CMD

SUB

ATTR

SEG

SADR

N

Response

"+"

ACK

"C"

"L"

"A"

CMD

SUB

ATTR

SEG

SADR

N

D1

－－－

DN

－－－

Symbol

Data

Details

CMD

43(H)

Function code

SUB

44(H)

Sub code

SEG

08(H)

Read out segment

SADR

0000 to 00FF(H)

Read out address #000 to #377(8) (2 byte data, in order of L and

H)

N

0001 to 0100(H)

Number of read out bytes (2 byte data, in order of L and H)

D1 to DN

See the example

Reading data of system memory (1 byte data x number of

reading data bytes)

[Ex.] To read data from system memory addresses #201 and #202

(201(8) = 81(H), Data in cells: Hexadecimal notation)

Command

2B

43

4C

41

43

44

00

08

81

00

02

00

Response

"+"

"C"

"L"

"A"

CMD

SUB

ATTR

SEG

SADR

N

2B

00

43

4C

41

43

44

00

08

81

00

02

00

01

01

ACK

CMD

SUB

ATTR

SEG

SADR

N

#201

#202

[6] Writing system memory

Read data

Write the specified number of bytes of data from the specified address in system memory. [Write mode assignment]: 2 (When the PC has been stopped with a "halt PC operation F8(H)"

command)

[Communication format]

Command

"+"

"C"

"L"

"A"

CMD

SUB

ATTR

SEG

SA

DR

N

D1

DN

Response

"+"

ACK

"C"

"L"

"A"

CMD

SUB

ATTR

SEG

SA

DR

N

Symbol

Data

Details

CMD

43(H)

Function code

SUB

54(H)

Sub code

SEG

08(H)

Write segment

SADR

0000 to 00FF(H)

Write address #000 to #377(8) (2 byte data, in order of L and H)

N

0001 to 0100F(H)

Number of writing bytes (2 byte data, in order of L and H)

D1 to DN

See the example

Write data of system memory (1 byte data x number of write

data bytes)

[Ex.] To write data 01(H), 01(H) to data from system memory addresses #201 and #202 (201(8) = 81(H), Data in cells: Hexadecimal notation)

Command		2B		43	4C	41		43		54		00		08		81		00	02	00		01	01
	"+"			"C"	"L"	"A"		CMD		SUB		ATTR		SEG		SADR				N		#201	#202
Response																						Write data
		2B	00		43	4C	41		43		54		00		08		81		00		02	00
				ACK						CMD	SUB			ATTR		SEG		SADR			N

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10-6