NCR 7870 manual Defaults, Hex Characters, Program Entry

A-2 Appendix A: Programming Worksheets

Defaults

Most of the programming parameters have defaults that are determined at the factory. A heavy box around an entry specifies it as a default value. Scanning the Default tag as the first tag after applying power to the 7870 sets the parameters to these values.

Hex Characters

Some of the programming parameters require Hex characters. Refer to the ASCII Code Chart for the proper selections.

Program Entry

Some host terminals can corrupt your program if they are running and are connected to the 7870 while a program is being entered. Either turn the host terminal off or disconnect all interface cables to the 7870 before entering the program.

1.Enter the Base Programming state by scanning the Programming Mode tag. This must be the first tag scanned after powering up the 7870.

2.Select a Programming Worksheet and enter its parameter data by scanning the Hex tags identified in Your Program at the bottom of the Programming Worksheet. Repeat this for each Worksheet.

3.Save the program by scanning the Save and Reset tag.