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8. DIAG (System Diagnostic)
M90 Series Portable Data Entry Unit Reference Manual
After the count is complete, the final screen appears. Press any key to re-
start the M90.
< PROGRAMMING
>
BIOS Update OK!
Press Any Key to
Restart. . .
Select option 8.DIAG from the Supervisor Mode menu to access the M90
diagnostic program to verify the M90. The diagnostic routines run these
tests: RAM, keypad, RS-232, LCD, real-time clock, scanner, and RAM
backup.
Note: Execute this diagnostic program when there is a service process,
such as maintenance, repair, or upgrade to verify that system. The diag-
nostic program may destroy data. Back up the M90 data.
0.All
1.RAM
2.KEY
3.232
4.LCD
5.RTC
6.SCANNER
7.RAM BACKUP
8.EXIT
SELECT(0—8)
?_
0. All (Run All Tests)
Select option 0. All from the Diagnostic menu to run all of the following
seven tests. This requires RS-232 loopback.
1. RAM (RAM Test)
Select option 1.RAM from the Diagnostic menu to flush the M90 RAM.
The first screen appears with a warning. Press [0] to return to the Diag-
nostic menu, or press [1] to continue with the memory flush.
S Fixed pattern stuck at fault check (00, FF, 55, AA)
Writes a fixed pattern of data to the RAM chip, then verifies the data
was stored properly.
S Address Test:
Writes odd, even address data into corresponding memory location,
then verifies it.
! ! WARNING ! !
Will Flush RAM &
RAM Disk !
Continue ?_
1=YES/0=NO
—
Chapter 3
Operation Modes
41
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