INT 2F - DOS 3.3+ PRINT.COM - GET PRINTER DEVICE
AX = 0106h
Return: CF set if files in print queue
AX = error code 0008h (queue full)
DS:SI -> device driver header
CF clear if print queue empty
AX = 0000h
Note:   documented for DOS 5+, but not documented for prior versions

See also: 2F0104

2F0106 - DOS 3.3+ PRINT.COM - GET PRINTER DEVICE