HP 95LX - Page 127

A cold restart—also called a hard reset—resets the HP 95LX to its factory-new
memory configuration. You can manually trigger a cold start by pressing
(but you should do this only as a last resort). A cold restart resets all of
the Setup settings to their defaults, and it erases the RAM disk (then reloads the
files copied from the SYS subdirectory to the dat subdirectory—see pages 13-
14). It also initializes system RAM and boots DOS to the System Manager.
How Much System RAM is Available?
The HP 95LX comes with 1 megabyte of ROM and a RAM total of 512 kbytes. The
ROM contains Lotus 1-2-3, DOS 3.22, and the built-in applications. You candivide
the RAM area into two parts—system RAM and the internal RAM disk (the built-
in C2 drive). Your main need for system RAM is when you open a file: a copy of
that file is placed in system RAM; any changes you make affect only that copy—
not the original—until you explicitly Save these changes to disk.*
The least amount of system RAM you can configure is 202kB; the greatest amount
is 498kB (which limits your RAM disk to little more than the SETUP .ENY file
inthe —dat subdirectory). After accounting for alittle “overhead,” this effectively
means that you can have anywhere from 106-480kB of system RAM available for
running programs. Here are the system RAM needs of various processes:
* Boot directly to the System Manager: 96kB. This includes memory used by
the underlying DOS operating system, the System Manager, and memory
reserved for the Filer and Setup applications in case they're needed.**
* Launch DataComm (by pressing (<»)): 19kB.
* Launch Appointment Book (by pressing (©): 17kB, plus the space for the
« ABK file being opened.
* Launch Phone Book (by pressing (2): 11.5kB, plus the space for by the « PBK
file being opened.
*Sokeep in mind that when you do a system reset or quit an application, the system RAM is cleared;
any data there is lost unless you have saved it to disk—either the built-in RAM disk (C2) or a plug-
in RAM card (RA%).
**Use the Filer if you run low on memory and need to save an open file to a different (remote) disk.
Setup contains the User-key macros, which should be available at all times.
All About RAM 127