Denso BHT-904BB User Manual page 120

BHT-904BB
[2] Memory test
Use the following procedure to perform a memory test.
1.
Select "2: MEMORY" at the TEST menu and then press the ENT
key.
The screen displays as shown on the right, and the BHT reads and writes
data to and from all areas of the RAM and performs an address check.
"XXXXX": Tested RAM capacity (unit: kilobytes)
"YYYYY": Total RAM capacity (unit: kilobytes)
If any error is detected, the BHT beeps three times, displays a message
similar to that shown on the right, and aborts the test.
"ZZZZZZZZ":
"AAAAAAAA":
"BBBBBBBB":
Press the Backspace/clear key to return to the TEST menu.
Upon normal completion of the RAM test, the BHT beeps once, displays a
message similar to that shown on the right, and returns to the TEST
menu.
104
Address where the error occurred
Data to write
Data read out the RAM