Standard Ram Disk Check; Option Ram Disk Check; Rom Diagnostics; Dos Rom Check - Sharp UP-5700 Service Manual

2) Standard RAM Disk Check

Check content
For the standard RAM disk area (BANK 000H
area of bank size 16KB is checked. The bank base address of
RAM is set to 0D4000H and after. The check procedures are as
follows:
i. Write different data to the following address with Word. After
completion of writing, BANK 03FH 0D4000H data read verify
check is made. (Data in the written area are saved in the main
memory.) If it is OK, the following test is executed. In case of
an error, the error display is made and the test is terminated.
Write address
BANK BFH (extension) 0D4000H
BANK 7FH (extension) 0D4000H
BANK 3FH (standard) 0D4000H
ii. The test area data is saved to the main memory.
iii. Test data 5555H is written to all the test areas.
iv. Test data and read data are compared for each word, If it is
O.K., test data AAAAH is written to the test area.
v. Test data and read data are compared for each word, If it is
O.K., test data 5555H is written to the test area.
vi. Test data 0000H is written to all the test areas.
vii. Test data and read data are compared for each word, If it is
O.K., test data FFFFH is written to the test area.
viii. Test data and read data are compared for each word, If it is
O.K., test data 0000H are written to the test area.
ix. The saved data are written to the test areas.
When an error occurs during the test, the error address and data
are displayed and the test is stopped.
Display
Standard RAM Disk Check
Standard RAM Disk size : 1024KB
Error Address xxxxxxH Write Data xxxxH
The error address and the error data are displayed only when an
error occurs. (If no error occurs, they are not displayed.)
Terminating method
After the test result is displayed, press Esc key to terminate the
test.

3) OPTION RAM Disk Check

Check content
For the standard RAM disk area (BANK 040H
each test area of bank size 16KB is checked. The bank base
address of RAM is set to 0D4000H and after. The check proce-
dures are as follows:
i. Write different data to each address with Word similarly to the
Standard RAM Disk Check. After completion of writing, BANK
0BFH 0D4000H data read verify check is made. (Data in the
written area are saved in the main memory.) If it is OK, the
following test is executed. In case of an error, the error dis-
play is made and the test is terminated.
ii. Test data 55AAH is written to BANK 040H 0D4000H.
iii. BANK 040H 0D4000H is read and compared with 55AAH. If
both data are correct, the following test is executed. If not,
"Extended RAM Disk size: 0KB" is displayed and the test is
terminated.
iv. The test area data is saved to the main memory.
03FH), each test
Write data
BF40H
7F80H
3FC0H
PASS !!(or ERROR !!)
Read Data xxxxH
BANK 0BFH),
v. Test data 5555H is written to the test area.
vi. Test data and read data are compared. If is OK, test data
AAAAH is written to the test area.
vii. Test data and read data are compared for each word, If it is
O.K., test data 5555H is written to the test area.
viii. Test data and read data are compared for each word, If it is
O.K., test data 0000H is written to all the test areas.
ix. Test data and read data are compared for each word. If it is
OK, test data FFFFH is written to the test area.
x. Test data and read data are compared for each word. If it is
OK, test data 0000H is written to the test area.
xi. The saved data is written to the test areas.
When an error occurs during the test, the error address and data
are displayed and the test is stopped.
Display
Option RAM disk Check
Extended RAM Disk size : 1024KB
Error Address xxxxxxH
The error address and the error data are displayed only when an
error occurs. (If no error occurs, they are not displayed.)
Terminating method
After the test result is displayed, press Esc key to terminate the
test.

3-4. ROM Diagnostics

DOS ROM, BIOS ROM, standard flash ROM, and option flash ROM
are tested.
The following menu is displayed. The highlighted cursor is moved by
the cursor keys (UP and DOWN ) of the AT keyboard. Move the
cursor to the desired item, and press Enter key to execute the se-
lected diagnostics program. When the selected diagnostics program
is completed, the display returns to the menu screen. Pressing Esc
key returns to the service diagnostics menu.
ROM Diagnostics

DOS ROM Check

BIOS ROM Check
Standard FLASH ROM Check
Option FLASH ROM Check
1) DOS ROM Check
Check content
Sum check is made for DOS ROM (BANK 000H
bytes are added. If the check sum is 10H, it is normal.
The ROM version is displayed.
Display
DOS ROM Check
Sum Check : PASS !!(or ERROR !!)
ROM Version : VHILH****
Terminating method
After the test result is displayed, press Esc key to terminate,
4 – 3
PASS !!(or ERROR !!)
Write Data xxxxH Read Data xxxxH
0FFH). All data
The version is displayed.