2 Troubleshooting Procedures 2.4 System Board Troubleshooting
5. Execute GETDPORT.COM in the text menu in CPU REAL mode. (Insert the FD for
starting D port into FDD and input “FD starting drive:>dport”.)
The D port status is displayed in the following form;
6. When the D port status is FFFF (normal status), go to Procedure 4. When the D port
status falls into any other status than FFFF, go to Procedure 3.
7. Cancel short-circuit for W3270 after the end of a test.
2-20 [CONFIDENTIAL] TECRA M9 Maintenance Manual (960-631)
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