HP 540 - Keys

Host/System Requirements
MS DOS 3.3 or Greater
MS Windows 3.1
2 MB of RAM
10 MB of Free Hard Disk Space
EGA Monitor or Greater
Configuring the Printer
The HP DeskJet 540 printer does not have any DIP switches. All printer
configuration is accomplished using the printer driver for MS Windows or
the HP DeskJet 540 Control Panel for DOS. Refer to “Printer Driver
Information” to learn more about printer settings in DOS and MS Windows.