Sharp UP-600 Service Manual page 19

Symbol/PartsCod)
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Display
The capacity checked is displayed in units of 64KB.
Standard RAM Check
512KB:PASS!!(or ERROR!!)
Error:XXXXXXH
Write:XXXXH
Read:XXXXH
The error address and bit are displayed only when an error occurs
(They are not displayed if there is no error.)
How to exit the program
You can exit the program by pressing the CANCEL key after the
results are displayed.
2)-2. UP-S02MB Check
Checking
The program checks for the presence of the UP-S02MB in the
following procedure.
Data in memory remains unchanged before and after checking.
i. Write 55AAH in 9FFFFEH.
ii. Read 9FFFFEH and compare the data with 55AAH. If both
data are correct and BFFFFEH is the same as 55AAH, the
following tests are performed. If not correct, the message
"0KB: ERROR!!" appears and checking ends.
The following checks are performed on the UP-S02MB.
The following operations are performed for the address space to
be checked (800000H - 9FFFFFH).
PASS1 : Save data in memory.
PASS2 : Write data "0000H".
PASS3 : Read and compare data "0000H" and write data "5555H".
PASS4 : Read and compare data "5555H" and write data "AAAAH".
PASS5 : Read and compare data "AAAAH".
PASS6 : Return data into memory.
If any comparison is not normal during the check sequence from
PASS 1 through 6, the error message appears.
If any error is not found up to the final address, the sequence
ends normally.
Then, another round of address checks is carried out using the
above check sequence.
If an error occurs, the error message appears and the checking
stops. The read/write of the address where the error occurs is
repeated.
Check point address = 800000H, 800001H
800002H, 800004H
800008H, 800010H
800020H, 800040H
800080H, 800100H
800200H, 800400H
800800H, 801000H
802000H, 804000H
808000H, 810000H
820000H, 840000H
880000H, 900000H
Display
The capacity checked is displayed in units of 64KB.
UP-S02MB Check
2048KB:PASS!!(or ERROR!!)
Error:XXXXXXH
Write:XXXXH
Read:XXXXH
The error address and bit are displayed only when an error occurs
(They are not displayed if there is no error.)
How to exit the program
You can exit the program by pressing the CANCEL key after the
results are displayed..
2)-3. UP-S04MB Check
Checking
The program checks for the presence of the UP-S04MB in the
following procedure. Data in memory remains unchanged before
and after checking.
i. After writing 55AAH in BFFFFEH, write AA55H in 9FFFFEH.
ii. Read BFFFFEH and compare the data with 55AAH. Data in
BFFFEH is correct, the following checks are performed. Data
read is AA55H, the message "UP-S02MB!!" appears and the
check ends. If the data read is not either 55AAH or AA55H, the
message "0KB:ERROR!!" appears and the check ends.
The following checks are performed on the UP-S04MB.
The following operations are performed for the address space to
be checked (800000H - BFFFFFH).
PASS1 : Save data in memory.
PASS2 : Write data "0000H".
PASS3 : Read and compare data "0000H" and write data "5555H".
PASS4 : Read and compare data "5555H" and write data "AAAAH".
PASS5 : Read and compare data "AAAAH".
PASS6 : Return data into memory.
If any comparison is not normal during the check sequence from
PASS 1 through 6, the error message appears.
If any error is not found up to the final address, the sequence
ends normally.
Then, another round of address checks is carried out in the above
check sequence.
If an error occurs, the error message appears and the checking
stops. The read/write of the address where the error occurs is
repeated.
Check point address = 800000H, 800001H
800002H, 800004H
800008H, 800010H
800020H, 800040H
800080H, 800100H
800200H, 800400H
800800H, 801000H
802000H, 804000H
808000H, 810000H
820000H, 840000H
880000H, 900000H
A00000H