Epson Y16499100301 - Manual (Page 102)

If an I/O or checksum error occurs, you see this message:
xxxx0 ROM error
where xxxx is the number of the segment of the bad I/O
ROM on an option card.
Clock and CMOS RAM Check
When the system device check is completed successfully,
the computer checks the timer and CMOS RAM. If the
information contained in the RAM does not match the actual
system installation, you see this message:
161-System options not set
(Run SETUP in DIAGNOSTICS)
The information stored in the CMOS RAM must be corrected.
Run the Setup program provided on the reference diskette to
correct the installation information.
If the system clock has not been set, this message is
displayed:
163-Time & Date not set
(Run SETUP in DIAGNOSTICS)
RAM Check
The computer now begins to check the computer’s RAM.
During this check, this message is displayed:
xxxKB OK
where xxx indicates the amount of memory in which no
malfunction is found. This value increases continuously by
64KB up to the amount of RAM installed on the main board,
which is 640KB. If the computer detects an error in the first
64KB area, an error message is displayed and the computer
halts with no further information.
C-2 Power-on Diagnostics