Toshiba Satellite 110 Series Maintenance Manual page 55

3.5 Memory Test
To execute the Memory Test, select 2 from the Diagnostic Test Menu, press Enter, and
follow the directions on the screen. Move the highlight bar to the subtest you want to ex-
ecute and press Enter.
Subtest 01 RAM Constant Data (Real Mode)
Writes a 256-byte unit of constant data to conventional memory (0 to 640
KB), then reads the data and compares the result with the original data. The
constant data is FFFFh, AAAAh, 5555h, and 0000h.
Subtest 02 RAM Address Pattern Data (Real Mode)
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). The new data is then read and compared with the original data.
Subtest 03 RAM Refresh (Real Mode)
Writes a 256-byte unit of constant data to conventional memory (0 to
640 KB), then reads the 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.
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.
Writes constant data and address data to extended memory (memory area
beyond 1 MB), then reads new data and compares the result with the original
data.
The constant data is FFh, AAh, 55h, and 00h.
110 Series
3-9