Table of Content  Branch Up  

Register F

This register holds the effective File Identification Number (FID) and its content is always shown in Hex in the 2-digits seven-segment display on the front panel.

When the drive goes "On-Line" the content of the FID rotatory Hex key is copied into F so LC-81 software can read it. Software can also write the FID to F so the Operator can see it.

In reality, the only role of register F is to display its content in the front panel. It can be used for other purposes as well, such as reporting status or error conditions to the Operator.