Epson PC AX Technical Manual page 204

DIAGRAMS AND REFERENCE MATERIALS
The error message is as folIows:
+-----------------------------------------------------------------+
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: Error code
=
101
l
l
80286 CPU ERROR
l
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+-----------------------------------------------------------------+
b. "OOh" is stored (safh) into the 8080 flag, then re-loaded
(lahf). The flags are checked and the program displays an
error message if any of the flags listed in Item a. above are
not reset (if the flag
=
1).
The error message is identical to that of Item a.
c. "Oaa55h" is sequentially written to and read from Registers
es, ds, and ss, then their values are checked. The program
displays an error message if the results do not match the
initial values.
The error message is identical to that of Item a.
d. Using "055aah" as the test data, acheck identical to that
described in Item c. is conducted.
The error message is identical to that of Item a.
2) 146818 CMOS Shutdown Byte Check
The 146818 CMOS shutdown byte check performs a WRlTE/READ
check on the shutdown byte of the 146818 CMOS.
a. The shutdown byte of offset 8fh of the CMOS is selected, "01"
is written and read, and the value is checked. The program
displays an error message if the result does not match the
initial value.
+-----------------------------------------------------------------+
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: Error code
=
110 :
: 146818 CMOS SHUTDOWN BYTE ERROR :
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+-----------------------------------------------------------------+
b. The test data of Item a. above is shifted to the left, then a
check identical to that described in Item a. is performed for
a11 eight bit s.
The error message is identical to that of Item a.
c. Using "Oaah" as the test data, acheck identical to that
described in Item a. is performed.
The error message is identical to that of Item a.
d. Using "055h" as the test data, acheck identical to that
described in Item a. is performed.
The error message is identical to that of Item a.
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REV.A