Heath HEATHKIT HA8-8 Manual page 24

Extended configuration board
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If you obtained the proper results, proceed to
"Test #5."
If you did not obtain the proper results, check
the installation of integrated circuit U2 and
switch SWl on the Extended Configuration
Board.
TEST #5
(
)
Set the eight sections of switch SWl on the
Extended Configuration Board to "1."
(
)
Turn the Computer on and enter MEM, 111,
362, and IN. The display should read 377, 362.
If you obtained the proper results, proceed to
"Status Port."
If you did not obtain the proper results, check
the installation of integrated circuits U2, U4,
U5, and U6 and switch SWl on the Extended
Configuration Board.
NOTE: The following sections describe the three
functions available with the Extended Configuration
Board and some modifications that you must make to
other circuit boards in your H8. Read all of the infor­
mation before you actually perform any of the modifi­
cations. Decide which functions you wish to use.
Then make the necessary modifications for those
functions.

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