How do I run a TSR (Terminate-and-Stay Resident) program on the HP 95LX?

Use the Memo application, create two files: CONFIG.SYS and AUTOEXEC.BAT. The CONFIG.SYS file should contain the following line:

SHELL=COMMAND /P

(with a space between "COMMAND" and "/P"). The AUTOEXEC.BAT file should contain the name of the TSR you want to run, followed by the line $SYSMGR which will start the built-in System Manager. These files should be put in the root directory of your RAM card if you have one. They will also work in the root directory of the internal RAM disk. These files are executed whenever the system is rebooted. Before rebooting the system, quit all of your open applications, making sure to save files that you have modified. Then, press (CTRL)-(ALT)-(DEL) to reboot the system. During the process of restarting the system, your AUTOEXEC.BAT and CONFIG.SYS files will be executed. The User's Guide contains instructions for the SHELL command on page B-24.

WARNING: These commands represent a serious modification to your HP 95LX. You should be experienced with the use of CONFIG.SYS and AUTOEXEC.BAT files. If you make a mistake in these files, you may not be able to reboot the system. Therefore, you should only install these files on a RAM card. If there is a problem, you can remove the RAM card and the system will boot up in the normal way.