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• Flow Chart of Self-diagnosis Program
Start testing Channel A. Stop the program when an error occurs. If Channel A is found normal, test Channel B then.
Set Z80-SIO
mode
Start checking
Channel A
Start checking
Channel B
"
Output test data
Output tast data
from Channel A
from Channel B
Contantl of arror
Contents or error
displayed
displayed
No
No
.... .---<
11
Channel B is
normal
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_
...
_---
-------
. . -........--..-
...
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