03-20-2011
You want to write a UNIX operating system from scratch for this, covering all possible hardware in the "old laptop" spectrum? I'm pretty sure there already are operating systems that run on old laptops, and it's taken decades of continuous effort to get them where it is already. Pretty sure you don't have that kind of time or developer base.
I don't think old laptops are even very GOOD at digital audio. Built-in sound devices are invariably garbage.
Just make a linux distro. You don't want auto-update? You have full control over what you include, rip it out. (And put up with the same program bugs forevermore, but whatever -- you must know what "no updates ever" implies if you asked for it.)
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LEARN ABOUT OSF1
dxsysinfo
dxsysinfo(8) System Manager's Manual dxsysinfo(8)
NAME
dxsysinfo - Monitors system information such as CPU activity, memory, swap space, and file system usage
SYNOPSIS
/usr/bin/X11/dxsysinfo [options]
OPTIONS
Displays the CPU Activity meter. Shrinks the window so that only the General Information area is visible. The -dashview option is ignored
when it conflicts with other options or when all of the components in the General Information area were deselected in a previous invocation
of the System Information application. This option is incompatible with the -fs option. If -dashview is specified with -fs, -dashview is
ignored. Displays the File System area. Displays warning lights for file systems and swap space that have exceeded the recommended
threshold. Displays the In-Use Memory meter. Displays the Available Swap meter.
When these options are used on the command line, only the specified parts of the application are displayed.
A user preferences file is created in the user's home directory the first time the application runs. It records user-specified options and
any customizations made while running the application. If any of the command line options other than the -dashview option are used, the
System Information application does not read the View state settings in the user preferences file. If the -dashview option is used on the
command line without any other options, the application reads the View state settings in the user preferences file, $HOME/.sysman/Dxsys-
info.
System Information accepts all of the standard X Toolkit command line options, which are documented in the X(1X) reference page.
DESCRIPTION
Use the System Information application, dxsysinfo, to: Obtain general information about the operating system and version, amount of RAM,
and number of CPUs Monitor CPU activity, in-use memory, available swap space, and file system usage Set and modify file system thresholds
To start dxsysinfo from the CDE desktop: Click on the Application Manager icon on the CDE front panel. Double click on the System_Admin
application group icon. Double click on the DailyAdmin application group icon. Double click on the System Information application icon.
EXAMPLES
To start System Information from the command line, enter: /usr/bin/X11/dxsysinfo
Online Help
For additional information about the graphical user interface, see the online help volume. To open the online help volume from within Sys-
tem Information, run the application and choose Overview from the Help menu in the main window.
You can view the System Information online help volume without running the application. To open the System Information help volume from the
command line, enter the following command: /usr/dt/bin/dthelpview -helpVolume /usr/dt/appconfig/help/C/Dxsysinfo.sdl
FILES
Contains user preferences that control the appearance of the application, file system information, and device information Contains the Sys-
tem Information executable Contains the System Information help volume Contains the default values for the application's X resources
SEE ALSO
Commands: df(1), ps(1), showmount(8), swapon(8), sysman_intro(8), uname(1), vmstat(1), X(1X)
dxsysinfo(8)