Shocker #01 20 января 1998

Софт

Soft - on programs to test memory.

               RamTest1 (2)



    This article is addressed primarily
users with the additional
memory (more than 128 kbyte), extended
through senior (6,7) bits of the port # 7FFD. For
verify this have been dented pridumanny prog
RamTest1 and RamTest2, but .. Not so long ago
I for some reason burned my
Loved "PROFI +", (incidentally extended to
512 kb. port # 7FFD). After
I had  repaired , in 
front of me was Objective: To test the memory. Benefit PROFI

differs from all other components of the presence of
Check test almost all sites, stitched
mostly ROM PROFI. This test showed
failure of one memory cell,
located just in the more
memory.

    And then I decided to try out the prog
RamTest1 (2). Ironically, these tests
nothing suspicious opredilili.
Through the debugger, I began to enter STS5.1AL
for faulty address codes # 00 and # FF, and
# FF instead prescribe # FD. This told
that RU7-I really faulty.
Replace damaged chip
problem disappeared.

    Analyzed the prog RamTest1 (2), I
concluded:

    RamTest1 (2) It's as only
opredilyayut availability and access to web pages
memory through the most significant bits of the port # 7FFD,
and can be fully opredilyayut
Downtime RUshek. But if not
running multiple cells, the program
RamTest1 (2) completely powerless, although
RamTest2 is possible as incomplete,
and a complete scan of all memory.

    So, what I suggest for these special tests
not paying attention. A little later I
going to write a normal test. So as
I plan to release a new TestPZU-512,
similar TestPZU-48, TestPZU-128.

    For questions and suggestions
BABURKAsoft contact by phone:
42-38-41 (Sergei).



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