Thanks, I've mounted it.

Ram Disk:> mossys:Data/Printers/gs -sDEVICE=hl1250 -sOutputfile=usbpar: ram:filename.ps
GPL Ghostscript 8.70 (2009-07-31)
Copyright (C) 2009 Artifex Software, Inc. All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.

>>showpage, press <return> to continue<<
GS<1>
GS<1>showpage
>>showpage, press <return> to continue<<

GS<1>


No success.