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3.5
Memory Test
To execute the Memory Test, select 2 from the DIAGNOSTIC TEST MENU, press Enter
and follow the directions displayed on the screen. Move the highlight bar to the subtest you
want to execute and press Enter.
Subtest 01
RAM constant data
This subtest writes a 256-byte unit of constant data to conventional memory (0
to 640 KB). Then reads the new data and compares the result with the original
data. The constant data is FFFFh, AAAAh, 5555h, and 0000h.
Subtest 02
RAM address pattern data
This subtest writes address pattern data created by the exclusive-ORing
(XORing), to the address segment and address offset in conventional memory
program end to 640 KB, then reads the new data and compares the result with
the original data.
Subtest 03
RAM refresh
This subtest writes a 256-byte unit of constant data to conventional memory (0
to 640 KB) then reads the new data and compares the result with the original
data.
The constant data is AAAAh and 5555h.
NOTE: There is a short delay between write and read operations, de-
pending on the size of the data.
Subtest 04
Protected mode
NOTE: The CONFIG.SYS file must be configured without expanded
memory manager programs such as EMM386.EXE, EMM386.SYS or
QEMM386.SYS. Also, the HIMEM.SYS must be deleted from the
CONFIG.SYS file.
This subtest writes constant data and address data to extended memory (maxi-
mum address 100000h) then reads new data and compares the result with the
original data.
The constant data is FFh, AAh, 55h, and 00h.
430 Series
3-9
- Quick Links:
- System Unit Block Diagram
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