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01
Table A-1
ROM Diagnostic Error Messages and Tests
<
0
-l
~
(Xl
Tested During
Possible Sou.rce
x
Error Message
Test that Failed
Power-On Reset Self-Test
of Problem
LEOs ON
Fatal
m
:xl
:xl
ROM FAILURE
ROM CRC test
VT18X control module
1,2,3,4
yes
0
y
y
Y
:xl
3:
CPU FAILURE
CPU instruction
y
p
no
VT 18X control module
1,2,3
yes
m
(J)
test
(J)
>
Ci)
RAM FAILURE 8KS
RAM memory test
y
y
VT 18X control module
1,3,4
yes
m
y
(J)
TO 64KS
RAM FAILURE OKS
RAM memory test
y
p
y
VT 18X control module
3,4
yes
T08KS
RTC FAILURE
Real-time clock
y
y
y
VT 18X control module
1,2,4
yes
test
TERMINAL -PRINTER
General-purpose
&
y
y
y
VT 18X control module
2,4
no
FAILURE
printer ports
CONSOLE FAILURE
Console port test
c
no
c
VT18X control module
1,4
yes
COMM PORT FAILURE
Communications
c
no
c
VT 18X control module
4
yes, for
port test
terminal
mode; no, for
diskette boot
mode.
FLOPPY ERROR,
Floppy
y
y
y
VT 18X control module
1,2,3
no, for
INTERNAL REGISTERS
controller / drive
terminal
test 1
mode; yes,
for diskette
boot mode.
FLOPPY ERROR,
Floppy
y
y
y
RX 180 disk drive
2,3
no
RESTORE FAILURE,
controller / drive
DRIVE x
test 2
FLOPPY ERROR, STEP
Floppy
y
no
y
RX 180 disk drive
1,3
no
FAILURE, DRIVE x
controller / drive
test 3
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