Honeywell Bendix/King KX 165A Maintenance Manual page 154

BENDIX/KING
(d) The specification of the hardware board (200-).
In the example, the items marked "C", in the right margin, are all the programmable device assem-
blies which fulfill the software requirements.
(4) DEFINITION OF A HARDWARE BOARD
The hardware board (200-) parts list contains two categories of items that relate to programmable
devices:
(a) The non-software programmable device sets (126s) that fulfill hardware requirements
(Items D1 through D4, in the example.
(b) The references to all of the programmable devices (122-) on the board. These references
resolve device location on the board, in that they use the SYMBOL field of the parts list, to specify
component location. These 122- numbers are of the form 122-3XXXX-9999 or 122-0YYYY-9999.
The 122- numbers of the form 122-3XXXX-9999 are used for non-software programmable devices
(126-) that fulfill hardware requirements, and therefore these programmable device sets appear
on the hardware board (200-) parts list (Items D5 through D10, in the example).
The 122- numbers of the form 122-0YYYY-9999 are used for both software programmable devic-
es (125-) (Items D12 through D15, in the example), and non-software programmable devices
(126-) (Item D11, in the example), that fulfill software requirements.
These programmable device sets appear on the hardware/software board (205-) parts list.
The exact programmable device (the resolution of the -9999, in the above items) is specified by
the respective software programmable device set (125-), or the non-software programmable de-
vice set (126-) parts list.
Using the SYMBOL field as specified above, would discourage the use of the SYMBOL field for
this purpose, in the programmable device sets (125- and 126-) parts list. This would then permit
the specification of the same programmable device sets in different boards, hence different com-
ponent designators. In the example,
• The items flagged D1 through D4, in the right margin, are non-software programmable
device sets.
• The items flagged D5 through D10, in the right margin, are non-software programma-
ble device designators, that fulfill hardware requirements.
• The item flagged D11, in the right margin, is a non-software programmable device des-
ignator, that fulfills software requirements.
• The items flagged D12 through D15, in the right margin, are software programmable
device designators, that fulfill software requirements.
Figure 1, while closely related to a specific product, does not represent an exact configuration in
use by that product. This example has been modified to clarify certain points.
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Figure 1:
15610M00.RCD
KX 165A
Rev 0, Jun/2000