HP 95LX - Page 125

4. Press to reboot the machine. You will be prompted to enter a
new date and time (which you probably don’t need to do).
5. Press [ENTER], and you'll be at the DOS prompt.*
Once you have this CONF 19 . S4sfile, you can create an AUTOEXEC . BAT file
(using Memo Editor) that initiates certain TSR programs, perform various DOS
tasks, etc.—and then switches control back to the System Manager. That is, what
youinclude in your HUTOEXEC . BRT file is up to you, but you should end it with
the $SYSMGR command so that you'll have access to the built-in applications.
Running TSR Programs
Normally, when you quit a DOS programs, the memory blocksit occupied are made
available to other programs and files. A TSR (Terminate and Stay Resident)
program is a DOS program that stays resident in memory even after you quit
(terminate) it. TSR programs need special considerations on any PC, due to the
different way they're treated in the memory. And on the HP 95LX, this is further
complicated by the memory-swapping tricks of the System Manager.
In general, if you wish to have a TSR program available while you're working with
System Manager-compliant programs, you should boot DOS first (see page 115),
run the TSR, and then switch to the System Manager. Launching the TSR in an
AUTOEXEC .BAT file is one method to accomplish this, but even this approach
won’t allow all TSRs to run alongside the System Manager as they do on your
desktop PC. Problems can arise—usually when the TSR attempts some memory-
shifting of its own or when the System Manager intercepts messages (keystrokes,
internal commands, etc.) meant for the TSR.
Running the TSR before starting the System Manager is the best way to let them
operate properly. Remember to back up your files (see p. 134) before you attempt
to run a new TSR alongside the System Manager. If there's a crash, you may have
to do a cold start (CTRU-{<>}-{ON)), which will erase most of your C= disk (not good).
*While in DOS, you cannot run the built-in applications ( « EXMprograms). To return to the System
Manager from DOS, type $SYSMGR at the DOS prompt.
System Peculiarities 125