Casio SF-8500 Service Manual & Parts List page 27

3. ROM/RAM check
MEMORY
INT #1
INT---Internal RAM
EXT--External RAM(RAM card)
#1---Test data pattern(00,01,02...)
#2---Test data pattern(FF,FE,FD....)
NOTE 1. To change the RAM internal or extenal, press HOME/WORLD key. As SF-8500 has no RAM card
interface, Test only Internal RAM area.
NOTE 2. To change the test data pattern,
press CALENDAR key for data pattern 1 (00,01,02,03,......FF,00,01,02,03,......).
press HOME/WORLD key for data pattern 2 (FF,FE,FD,......00,FF,FE,FD,...........).
1) RAM write
The machine will beep after 3 seconds.
The menu is unchanged.
EXECUTING !
It means RAM write is succeeded.
2) RAM read
Normal end display is;
COMPLETE !
SPREADSHEET key
1 WRITE
2 READ
TEL key
3 CHKSUM
4 SPECIFIC
5 RTC
BUSINESS CARD key
MEMO key
SCHEDULE key
— 26 —
DISP CHNG key :Return to menu
: Write the set pattern to the selected
RAM area
: Compare the pattern displayed after
# with the write data of RAM and
displays the results.
: Dump contents of memory. (direc-
tion depens on setting of internal/
extarnal switch)
: Call up checksum and XOR values
for connected ROM/RAM data.
: Bring up clock display. The present
time, data and daily alarm can be set.
When there is no RAM to write a data,
the following message will be dis-
played.
NO RAM
To release this message, press DISP CHNG key.
Error end display is;
DATA ERROR !
ADDRESS CORR
XXXX XX
To release this message, press DISP CHNG key.
RAM
XX