9845B/C Diagnostics 5-13
Once a block address has been entered, enter one of the following keys to select which portion
of the block
is
to be tested.
Key
Selects
the
CD
CO
CO
Upper 32k bytes (addresses 40000-77777)
Lower 32k bytes (addresses 00000-37777)
Test
full
block (addresses 00000-77777)
Note
Since block 1
is
only 32k bytes, block 1 testing
is
automatic
(if
selected) without the above block portion selection.
Then press (
CONTINUE)
to start the test.
Blocks are continuously tested. The block number and the starting and ending addresses are
displayed (no display during block 1 testing).
Press (
STOP)
to exit the test.
Memory errors are displayed with the following format:
MEMORY
ERROR
5LK
55
ADDRESS
AAAAAA
HAS
XXXXXX
NOT
YYYYYY
BB-
Octal block number
MAAAA- Octal memory address
XXXXXX-
Actual octal data
YYYYYY
- Expected octal data
To recover from an error:
Press (
CONTINUE)
to continue with the next address.
Press
CD
to continue testing with the next block.
Press (
STOP)
to exit the test.
After recovering from an error, the inverse video on the error message
is
turned
off.
Peek
and
Poke
This feature allows you to read data from a specified memory location
and
to write data into a
specified memory location.
6 digit octal addresses are accepted,
in
the range 000040-177777.
Locations 0 through
37
in
any block should not be written into. These locations correspond to
processor register numbers. Accessing these locations may stop the mainframe activity.
The test binary
and
the basepage can be destroyed by writing
in
the blocks that contain them
(usually blocks
0
and
1), Read address 000033 for the current binary block
and
address
000036 for the current basepage block.
PressCIJ;
To read the contents of a memory location use this syntax; example Address 123456,
Blk
4
12311S8 ;
1I
(
EXECUTE)
I
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