reformatting C failed to erase data if in subdirectory

[cormacj]

To recreate:

• |format,2,8
• |mkdir,"test"
• |cd,"test"
• copy some data to C:
• |format,2,8 - you will get the "Disc already formatted" message - answer Y
• your files still show up on cat, etc until you |cd,".."

[cormacj]

Before returning from |format I should probably invalidate the current directory

[cormacj]

This works on a top level directory, but not if you are within a subdirectory.

The problem here is that there isn't an obvious way to invalidate the current directory because it's not clear if you are formatting something in the current directory, or if you are formatting while on a different drive.

[cormacj]

Seems to be limited to C:

Testing on A:

It takes a moment, but it corrects itself.