NEC nd-20292 manual Initializing the PC-8300

750.5 INITIALIZING THE PC-8300

There are two types of initialization with the PC-8300 computer.

1.Cold Start:

Used during initial installation or when battery failure occurs. All contents of RAM are erased.

2.Warm Start:

Used after installation and during normal operation to run the same program. All contents of RAM are retained.

Under normal operating conditions (after initial installation) the first display provided is the LCR Main Menu upon power up or reset.

750.51Cold Start Initialization

Under normal operating conditions the memory data in the PC-8300 is battery backed and is retained when the power switch is turned off. If the battery voltage drops too low, the memory may be lost and a cold start is required. The following procedure describes how to

reinitialize the PC-8300. This procedure is also followed when the PC-8300 is first used for LCR programming.

1.Ensure that the batteries are fully charged and that the backup switch (located at the bottom of the PC-8300) is turned to the ON position.

2.Ensure that the LCR floppy disk is not installed in the disk drive unit (PC-8231A).

The micro floppy disk is removed by pushing the eject button until the disk is completely ejected. See Figure 700-25 Removing the Floppy Disk.

Figure 700-25 Removing the Floppy Disk

3.Ensure that both the PC-8300 and disk drive unit are turned off.

4.Close the write protection hole on the floppy disk.

NOTE 1: Opening the write protection hole will prevent writing onto the micro floppy disk. Closing it will permit writing on to the micro floppy disk. Data and files which you

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do not wish erased are protected by opening the write protection hole. To change or replace data or programs contained on the micro floppy disk, the write protection hole must be closed. It opens and closes by way of a small slide switch.

‘NOTE 2: Make sure the micro floppy disk is correctly inserted. When correctly inserted, a click will be heard and the micro floppy disk will be pulled into the unit.

5.Insert the LCR floppy disk into the disk drive unit. See Figure 700-26. Inserting the Floppy Disk.

The micro floppy disk after insertion

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Correctly inserted position Incorrectly inserted position

Figure 700-26 Inserting the Micro Floppy Disk

6.Turn the disk drive unit on. Ensure that the green LED goes on and that shortly thereafter the red LED turns on for a second or two and then turns off, If the red LED does not come on for a second or two and then turns off; go back to step 1 above.

NOTE: In step 7 below, the computer is turned on while depressing the SHIFT and CTRL keys. Cold start is also accomplished (with power to the computer already on) by depressing the RESET button (located on the rear of the PC-8300 while depressing the SHIFT and CTRL). See Figure 700-27 Rear Side View of the PC-8300.

7.While depressing the SHIFT and CTRL key simultaneously, turn on the PC-8300. Ensure that the red LED on the disk drive lights for a second or two and then goes off. If this does not occur, go back to step 1 above.

8.Proceed to the auto start setting procedure.

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