There is currently no Apple support for downloading fonts or PostScript programs to the LaserWriter Select 310. There is a shareware utility called "ShowPages" that allows downloading of PostScript files to the LaserWriter Select 310.
A description of ShowPages is on the following Info Mac site:
http://macinsearch.com/infomac2/printing/show-pages-141.html
To download the ShowPages, use the server list at the bottom of the page. ShowPages may be difficult to locate, so keep trying servers from the list at the bottom of the page, until you locate it.
Note: Currently, ShowPages can be found on the server: 'ftp.uu.net', however this can change without notice.
By downloading a PostScript program such as the one below the amount of installed memory, available virtual memory, PostScript version, and the ROM revision can be checked. Cut and paste the following PostScript program into a text file and then use PSTool or some other equivalent program to download the file to the printer. This same programs with other PostScript laser printers.
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POSTSCRIPT CODE
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% PostScript tool to print total RAM, VM, and PS version info.
% Use PSTool or other PostScript downloader program to download
% this program to a PostScript device.
serverdict begin 0 exitserver
/Times-Roman findfont
15 scalefont
setfont
72 700 moveto
/str 20 string def
/str1 20 string def
(Printer RAM: ) show
statusdict begin ramsize str cvs show
( bytes) show
72 670 moveto
/str2 20 string def
/str3 20 string def
(Available Virtual Memory: ) show
vmstatus exch sub 10 string cvs show
( bytes) show
72 640 moveto
/str4 20 string def
/str5 20 string def
(PostScript Version: ) show
statusdict begin version str4 cvs show
72 610 moveto
(ROM Revision Level: ) show
statusdict begin revision str5 cvs show
showpage