Sharp PC7000A Service Manual page 9

(2.2.4) Error Processing
When the total error is zero, the system does not detect an
error in the test. On the other hand, if the system detects
an error,
it
displays the following error message on the error
message field and continues the test.
"Memory error! I"
If the system detects an error, it displays the address, data,
and relating
Ie
number where the error occurs.
(2.3) Aging [Marching and ADCOMP] .
(2.3.1) Outline
This program serves as an aging test for the memory. It
alternately conducts marching test and address complement
test.
For details of the program, see Paragraphs (2.1) "Marching"
and (2.2) "Address Complement".
(2,3.2.) Operation
When specifying this test, enter the proper data to prompts
displayed sequentially as shown in Figure MEM-4.
(a) Test
(a.l) Specification of Error Stop
Error stop? [0: Yes, 1: NoJ
=
I\l
If an error occurs while conducting the test, specify
whether to abort or continue the test.
(a.2) Confirmation of Test Execution
-------------------~-----
Test start? [0: Yes, 1: NoJ
=
I\l
Confirm whether to execute the test or not.
When entering [[1 J], the test can be conducted from
"Specification of Error Stop" mentioned in (a.1). On the
other hand, when entering [[OJ], the system displays the
screen as shown in Figure MEM-4 and starts the test.
The system displays the current area and total area in
hexadecimal notation on the lower portion of the screen.
Test mode: Marching
Pass count [Ox]
=
~1\l~1\l
Current area [OxJ
=
I\ll\ll\ll\ll\l -
~I\ll\ll\ll\l
Total error [Ox]
=
I\ll\ll\ll\l
The test mode represents the currently executing mode
(Marching, Address complement). The pass count repre-
sents the number of times of test pass.
The current area represents the area being tested in the unit
of 4 KB physical address. The total error represents the
number of times an error occurs.
-7-
(2,3.3) Abortion and Completion of Test
PC-7000A
PC-7100
Although [[ESCJ J and [[F2J] are available while the test
is conducted, a time lag occurs because these key opera-
tions are processed in the state where the executing pro-
gram step is completed.
By pressing [[ESC] J, control exits to the MEM test menu
(Figure MEM-ll.
By pressing [[F2)], the system displays the following
message on the lower left screen and aborts the test.
"Test stopped by user."
At the time, by pressing [[Fl J J, the system continues the
test; by pressing [[ESCJ J, control exits to the MEM test
menu (Figure MEM-l).
Whenever one test is completed, the system increments the
pass count and repeats the test.
(2.3.4) Error Processing
When the total error is zero, the system does not detect an
error in the test. On the other hand, if the system detects
an error, it displays the following error message on the
error message field.
"Memory error! !"
In addition, it the Error Stop is set to "Yes", the system
displays the following message and aborts the test.
"Test stopped !!"
If the Error Stop is specified to "No". the system displays
only the preceding message and continues the test_
(3)
Decision Standard
The system represents a compare error unless the total error
is "0" when the test is completed_ If the system detects an
error, it displays the address, data, and the relating Ie
number where the error occurs.
All
addr~sses
being displayed are physical addresses of the
memory.
(4) Supplementary Description of Test Function
In the following, this test is exemplified in detail by using
384 KB of memory capacity.
Address
$00000r-------------------------,
Vector area
$ 0 0 4 0 0 \ - - - - - - - - - - - - - - - - - 1
DOS
USE R's area
$560001--------------------------1
VRAM, FD Buffer
$5FFF
L -______________________ - - '