Mapped Drive Aware Prompt

    function Prompt {
        # if current Drive is a mapped drive, show the mount point
        # If you add a mapping it will not show unless you:
        # $Global:Drives = $null
       
        if ($Global:Drives -eq $null) {
            $Global:Drives = @{ }; Get-WmiObject Win32_LogicalDisk | %{ $Drives.Add($_.DeviceID,$_)};      
        }
        $Loc = $(Get-Location)
        $LocExtended = $Drives[$Loc.path.substring(0,2)].ProviderName + ' ' + $Loc
        $(if (test-path variable:/PSDebugContext) { '[DBG]: ' } else { '' }) + 'PS ' + $LocExtended + $(if ($nestedpromptlevel -ge 1) { '>>' }) + '> '
    }