These *.grm files are taken from the TI Calc command module.  You 
need the latest version of PC99 (stage 6 or higher) or a HSGPL card 
or a Mechatronic Gram Card to run these files.  Because of the 
unusual bank switching scheme used these files will not run on a 
Geneve or a Gram Kracker.

PC99 as well as licensed scanned copies of the TI Calc user manual 
can be purchased from Cadd Electronics at 
http://pw2.netcom.com/~mjmw/index.html

Information about the HSGPL is available from the System 99 User 
Group at  http://home.t-online.de/home/harald.glaab/support.htm