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Chapter 5: NCR 5945 Diagnostics Specification
5-7
IBM 46xx Test
Reports whether or not the NCR 5945 is receiving RS485 IBM 4680
Feature C polls at the indicated address.
Select the IBM 46xx TEST from the Diagnostics Menu:
IBM 46xx TEST
2A23 <0x68>
The second line displays the first slot and port number option that can
be tested.
The keypads Yes and No keys are used to scroll up and down through
the 4 available slots and port number options. These 4 options are:
1.
2A23 <0x68>
. Selects slot 2A, port 23. This corresponds to the
Feature C address 0x68 (104).
2.
2A25<0x64>
. Selects slot 2A, port 25. This corresponds to the
Feature C address 0x64 (100).
3.
2B23<0x69>
. Selects slot 2B, port 23. This corresponds to the
Feature C address 0x69 (105).
4.
2B25<0x65>
. Selects slot 2B, port 25. This corresponds to the
Feature C address 0x65 (101).
To test the Feature C port, select the port by pressing the Enter key
when the appropriate slot and port option displays. The following
information displays:
Testing 2A23
Poll Count 0000
The first line displays the slot and port option selected.
The Poll Count on line two displays the number of Polls that have been
received at this port address. Polling always starts from zero.
If the selected Feature C port is active on the IBM 46xx, the number of
polls increment at a rapid rate. This indicates that communications
with the IBM 46xx register are being conducted.
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