Run all above checks

To run all the tests on the menu in sequence, press 4 and then Enter.

When you choose this option, all checks for the diskette drive(s) and controller are performed automatically in sequential order. Although you do not start each test, you must still supply the appropriate responses to progress from one test to the next.

Math Coprocessor (8087) Check

Use this option to check the operation of the 8087 math coprocessor if you have one installed in your computer.

To start the test, select option 7 from the DEVICE LIST menu. The program runs a series of checks on the precision with which the coprocessor performs calculations and handles exceptions, and reports any errors that occur,

Parallel Port (Printer Interface) Check

Use this option to test the operation of the computer’s primary parallel port.

To perform the test, you must insert a special loop-back connector into the parallel port so that the computer can check the individual pins of the port. Contact your dealer if you need a loop-back connector.

Note

If you connect a parallel printer cable instead of a loop-back connector, you will get errors. Also, you need a different loop-back connector to test the serial port.

When you select option 9 from the DEVICE LIST menu, you see this message:

Attach loop-back connector to parallel port. Enter Y to start this check when connector is attached, or

Enter N to return to the menu.

Performing System Diagnostics

D-15