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<a name="l1"></a><span class=cF5> Welcome to ZealOS</span><span class=cF0>
<a name="l2"></a>
<a name="l3"></a>ZealOS is a x86_64, multi-cored, non-preemptive multi-tasking, ring-0-only, single-address_mapped (identity-mapped), operating
<a name="l4"></a>system for recreational programming. Paging is almost not used.
<a name="l5"></a>
<a name="l6"></a>The people whom can most benefit are:
<a name="l7"></a> * Professionals doing hobby projects
<a name="l8"></a> * Teenagers doing projects
<a name="l9"></a> * Non-professional, older-persons projects
<a name="l10"></a>
<a name="l11"></a>Simplicity is a goal to </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Strategy.DD.html#l1"><span class=cF4>keep the line count down</span></a><span class=cF0>, so it's easy to tinker with. As it turns-out, simplicity makes it faster in
<a name="l12"></a>some ways, too. It never switches privilege levels, never changes address maps, tends to load whole contiguous files and
<a name="l13"></a>other, similar things which boost speed. It's only 95,265 lines of code including the kernel, the 64-bit compiler, the
<a name="l14"></a>graphics library and all the tools. More importantly, it's designed to keep the user's line count down -- you can do a </span><span class=cF4>
<a name="l15"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/HelloWorld.DD.html#l1"><span class=cF4>Hello World</span></a><span class=cF0> application in one line of code and can put graphics on the screen with a three line program!
<a name="l16"></a>
<a name="l17"></a>It's a kayak, not a Titanic -- it will crash if you do something wrong. You quickly reboot, however. DOS and the 8-bit home
<a name="l18"></a>computers of the 80's worked fine without memory protection and most computers in the world -- the embedded ones -- operate
<a name="l19"></a>without protection. The resulting simplicity of no protections is why ZealOS has value. In facts, that's the point of
<a name="l20"></a>ZealOS. See the </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Charter.DD.html#l1"><span class=cF4>ZealOS Charter</span></a><span class=cF0>.
<a name="l21"></a>
<a name="l22"></a>Conventional thinking is &quot;failure is not an option&quot; for general purpose operating systems. Since this OS is used in addition
<a name="l23"></a>to Windows or Linux, however, failure is an option -- just use Windows or Linux if you can't do something. We cherry-pick
<a name="l24"></a>what it will and won't do, to make it maximally beautiful. The following applications more or less form a basis that spans
<a name="l25"></a>the range of use that ZealOS is intended for:
<a name="l26"></a></span><span class=cF4>
<a name="l27"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/BattleLines.ZC.html#l1"><span class=cF4>/Demo/Games/BattleLines.ZC</span></a><span class=cF4>
<a name="l28"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/BigGuns.ZC.html#l1"><span class=cF4>/Demo/Games/BigGuns.ZC</span></a><span class=cF4>
<a name="l29"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/BlackDiamond.ZC.html#l1"><span class=cF4>/Demo/Games/BlackDiamond.ZC</span></a><span class=cF4>
<a name="l30"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/BomberGolf.ZC.html#l1"><span class=cF4>/Demo/Games/BomberGolf.ZC</span></a><span class=cF4>
<a name="l31"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/CastleFrankenstein.ZC.html#l1"><span class=cF4>/Demo/Games/CastleFrankenstein.ZC</span></a><span class=cF4>
<a name="l32"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/CharDemo.ZC.html#l1"><span class=cF4>/Demo/Games/CharDemo.ZC</span></a><span class=cF4>
<a name="l33"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/CircleTrace.ZC.html#l1"><span class=cF4>/Demo/Games/CircleTrace.ZC</span></a><span class=cF4>
<a name="l34"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Collision.ZC.html#l1"><span class=cF4>/Demo/Games/Collision.ZC</span></a><span class=cF4>
<a name="l35"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Digits.ZC.html#l1"><span class=cF4>/Demo/Games/Digits.ZC</span></a><span class=cF4>
<a name="l36"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/DunGen.ZC.html#l1"><span class=cF4>/Demo/Games/DunGen.ZC</span></a><span class=cF4>
<a name="l37"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Talons.ZC.html#l1"><span class=cF4>/Demo/Games/Talons.ZC</span></a><span class=cF4>
<a name="l38"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/ElephantWalk.ZC.html#l1"><span class=cF4>/Demo/Games/ElephantWalk.ZC</span></a><span class=cF4>
<a name="l39"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/FlapBat.ZC.html#l1"><span class=cF4>/Demo/Games/FlapBat.ZC</span></a><span class=cF4>
<a name="l40"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/FlatTops.ZC.html#l1"><span class=cF4>/Demo/Games/FlatTops.ZC</span></a><span class=cF4>
<a name="l41"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Halogen.ZC.html#l1"><span class=cF4>/Demo/Games/Halogen.ZC</span></a><span class=cF4>
<a name="l42"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/MassSpring.ZC.html#l1"><span class=cF4>/Demo/Games/MassSpring.ZC</span></a><span class=cF4>
<a name="l43"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Maze.ZC.html#l1"><span class=cF4>/Demo/Games/Maze.ZC</span></a><span class=cF4>
<a name="l44"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/RainDrops.ZC.html#l1"><span class=cF4>/Demo/Games/RainDrops.ZC</span></a><span class=cF4>
<a name="l45"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/RawHide.ZC.html#l1"><span class=cF4>/Demo/Games/RawHide.ZC</span></a><span class=cF4>
<a name="l46"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Rocket.ZC.html#l1"><span class=cF4>/Demo/Games/Rocket.ZC</span></a><span class=cF4>
<a name="l47"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/RocketScience.ZC.html#l1"><span class=cF4>/Demo/Games/RocketScience.ZC</span></a><span class=cF4>
<a name="l48"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Squirt.ZC.html#l1"><span class=cF4>/Demo/Games/Squirt.ZC</span></a><span class=cF4>
<a name="l49"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/TheDead.ZC.html#l1"><span class=cF4>/Demo/Games/TheDead.ZC</span></a><span class=cF4>
<a name="l50"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/TicTacToe.ZC.html#l1"><span class=cF4>/Demo/Games/TicTacToe.ZC</span></a><span class=cF4>
<a name="l51"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/TreeCheckers.ZC.html#l1"><span class=cF4>/Demo/Games/TreeCheckers.ZC</span></a><span class=cF4>
<a name="l52"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Varoom.ZC.html#l1"><span class=cF4>/Demo/Games/Varoom.ZC</span></a><span class=cF4>
<a name="l53"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Wenceslas.ZC.html#l1"><span class=cF4>/Demo/Games/Wenceslas.ZC</span></a><span class=cF4>
<a name="l54"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Whap.ZC.html#l1"><span class=cF4>/Demo/Games/Whap.ZC</span></a><span class=cF4>
<a name="l55"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/Zing.ZC.html#l1"><span class=cF4>/Demo/Games/Zing.ZC</span></a><span class=cF4>
<a name="l56"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/Games/ZoneOut.ZC.html#l1"><span class=cF4>/Demo/Games/ZoneOut.ZC</span></a><span class=cF4>
<a name="l57"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Apps/Psalmody/Examples/childish.ZC.html#l1"><span class=cF4>/Apps/Psalmody/Examples/childish.ZC</span></a><span class=cF4>
<a name="l58"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Apps/Psalmody/Examples/night.ZC.html#l1"><span class=cF4>/Apps/Psalmody/Examples/night.ZC</span></a><span class=cF4>
<a name="l59"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Apps/Psalmody/Examples/prosper.ZC.html#l1"><span class=cF4>/Apps/Psalmody/Examples/prosper.ZC</span></a><span class=cF0>
<a name="l60"></a>
<a name="l61"></a>Two things to know about ZealOS are that <u>tasks</u> have </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/Memory/MAllocFree.ZC.html#l391"><span class=cF4>MAlloc</span></a><span class=cF0>/</span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/Memory/MAllocFree.ZC.html#l387"><span class=cF4>Free</span></a><span class=cF0> heap memory, not applications, and tasks have compiler symbol
<a name="l62"></a>tables that persist at a scope like environment variables in other operating systems, and the symbols can include functions.
<a name="l63"></a>
<a name="l64"></a>With </span><span class=cF2>ZealOS</span><span class=cF0>, the command line feeds right into the </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/ZealC.DD.html#l1"><span class=cF4>ZealC</span></a><span class=cF0> compiler, line by line, and it places code into memory it </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/Memory/MAllocFree.ZC.html#l391"><span class=cF4>MAlloc</span></a><span class=cF0>()s.
<a name="l65"></a>The compiler is paused at the command line, waiting for input. Naturally, you </span><span class=cF2>#include</span><span class=cF0> a program to load it into memory and,
<a name="l66"></a>usually, start it.
<a name="l67"></a>
<a name="l68"></a>During the boot process, many files get </span><a href="https://zeal-operating-system.github.io/ZealOS/StartOS.ZC.html#l1"><span class=cF4>compiled</span></a><span class=cF0> before you have access to the command line. (Don't worry, booting takes
<a name="l69"></a>only two seconds.) All the header declarations for the operating system are compiled and are available for use in your
<a name="l70"></a>programs without needing to </span><span class=cF2>#include </span><span class=cF0>them. Everything is truly compiled to native </span><a href="http://en.wikipedia.org/wiki/Amd64#AMD64"><span class=cF2>x86_64</span></a><span class=cF0> machine code, nothing is </span><span class=cF2>interpreted</span><span class=cF0>
<a name="l71"></a>and there is no </span><span class=cF2>byte code</span><span class=cF0>.
<a name="l72"></a>
<a name="l73"></a>Statements at the global scope -- outside the scope of functions -- execute immediately. There is no </span><span class=cF2>main()</span><span class=cF0> function. In
<a name="l74"></a>stead, you give meaningful names to what would be </span><span class=cF2>main()</span><span class=cF0> functions and you invoke them by calling them with a statement in the
<a name="l75"></a>global scope, usually at the bottom of your file.
<a name="l76"></a>
<a name="l77"></a>Terry Davis started with </span><span class=cF2>C</span><span class=cF0> syntax, but didn't like the command line for a directory listing looking like this:
<a name="l78"></a>
<a name="l79"></a>&gt;</span><span class=cF2>Dir(&quot;*.*&quot;,FALSE);
<a name="l80"></a>
<a name="l81"></a></span><span class=cF0>So, he added default args from </span><span class=cF2>C++</span><span class=cF0> and it looked like this:
<a name="l82"></a>
<a name="l83"></a>&gt;</span><span class=cF2>Dir();
<a name="l84"></a>
<a name="l85"></a></span><span class=cF0>He didn't like that, so he made parentheses optional on calls with no args and it, now, looks like this:
<a name="l86"></a>
<a name="l87"></a>&gt;</span><span class=cF2>Dir;</span><span class=cF0>
<a name="l88"></a>
<a name="l89"></a>The syntax change created an ambiguity when specifying function addresses, like for calling </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/QuickSort.ZC.html#l99"><span class=cF4>QuickSort</span></a><span class=cF0>(). To resolve it, he
<a name="l90"></a>made a '</span><span class=cF2>&amp;</span><span class=cF0>' required in front of function names when specifying an address of a function, which is better anyway.
<a name="l91"></a>
<a name="l92"></a>Once Terry was no longer using standard C/C++ syntax, he decided to change everything he didn't like and call it </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/ZealC.DD.html#l1"><span class=cF4>HolyC</span></a><span class=cF0>. Here
<a name="l93"></a>are the new </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/ZealC.DD.html#l216"><span class=cF4>operator precedence</span></a><span class=cF0> rules. It's Biblical! See </span><a href="http://www.biblegateway.com/verse/en/Luke+5:37"><span class=cF4>Luke 5:37</span></a><span class=cF0>.
<a name="l94"></a>
<a name="l95"></a>There are no object files in ZealOS and, normally, you don't make executable files either, but you can. That's known as </span><span class=cF4>
<a name="l96"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Glossary.DD.html#l179"><span class=cF4>Ahead-of-Time</span></a><span class=cF0> compilation. Instead, you </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Glossary.DD.html#l188"><span class=cF4>Just in Time</span></a><span class=cF0> compile.
<a name="l97"></a>
<a name="l98"></a>Tasks have no priority and are never removed from the queue. Instead, they often poll whatever they are waiting on and
<a name="l99"></a>swap-out. (Swapping tasks takes half a microsecond and does not involve disk activity or memory maps.) See </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/Sched.ZC.html#l1"><span class=cF4>Scheduler</span></a><span class=cF0>. Pollin
<a name="l100"></a>g keeps it simple. It might be a problem if you had lots of tasks busy, which rarely happens on a home computer. The order
<a name="l101"></a>of the tasks in the queue determines front-to-back window order.
<a name="l102"></a>
<a name="l103"></a>The </span><span class=cF2>FAT32</span><span class=cF0> filesystem is supported to makes exchanging files with a dual booted other operating system easy and there is the
<a name="l104"></a>simple, 64-bit ZealOS </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/RedSea.DD.html#l1"><span class=cF4>RedSea</span></a><span class=cF0> filesystem. The </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/RedSea.DD.html#l1"><span class=cF4>RedSea</span></a><span class=cF0> has allocation bitmap for clusters and all files are stored contiguously.
<a name="l105"></a>You can't grow files.
<a name="l106"></a>
<a name="l107"></a>ZealOS is geared toward reading and writing whole files. There is support for direct block random access into files, however
<a name="l108"></a>-- </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskCFile.ZC.html#l151"><span class=cF4>FBlkRead</span></a><span class=cF0>() and </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskCFile.ZC.html#l214"><span class=cF4>FBlkWrite</span></a><span class=cF0>().
<a name="l109"></a>
<a name="l110"></a>There is no </span><span class=cF2>PATH</span><span class=cF0>, but parent directories are searched when a file is not found. This feature is especially useful for default
<a name="l111"></a>account files.
<a name="l112"></a>
<a name="l113"></a>ZealOS is for hobbyist programmers on single user (at a time) home computers, not mainframes or servers. The focus task is
<a name="l114"></a>all-important so symmetrical multiprocessing is almost pointless. Why does it matter running two apps at the same time twice
<a name="l115"></a>as fast when you really want to run one faster? You could say ZealOS does master/slave multiprocessing. The anticipated
<a name="l116"></a>use for multicore is primarily putting graphics on the screen. Hardware graphics acceleration is not used, so this is
<a name="l117"></a>possible. See </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/MultiCore.DD.html#l1"><span class=cF4>ZealOS MultiCore</span></a><span class=cF0>.
<a name="l118"></a>
<a name="l119"></a>There is no distinction between the terms </span><span class=cF2>task</span><span class=cF0>, </span><span class=cF2>process</span><span class=cF0> or </span><span class=cF2>thread</span><span class=cF0>. All have a task record, </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l3977"><span class=cF4>CTask</span></a><span class=cF0>, pointed to by the </span><span class=cF2>FS</span><span class=cF0>
<a name="l120"></a>segment register and are accessed with </span><span class=cF4>Fs-&gt;</span><span class=cF0> while </span><span class=cF4>Gs-&gt;</span><span class=cF0> points to a </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l4096"><span class=cF4>CCPU</span></a><span class=cF0> for the current CPU core. Each task can have just one
<a name="l121"></a>window, but a task can have children with windows. (The segment registers are just used as extra registers -- there is
<a name="l122"></a>nothing segmented about ZealOS' memory.) It is approximately the case that </span><span class=cF2>ZealOS</span><span class=cF0> is multi-threading, single-processing.
<a name="l123"></a>
<a name="l124"></a>In </span><span class=cF2>ZealOS</span><span class=cF0>, </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Glossary.DD.html#l154"><span class=cF4>System Task</span></a><span class=cF0> refers to the father of all tasks. It's never supposed to die. Since tasks inherit the symbols of
<a name="l125"></a>parents, system-wide stuff is associated with </span><span class=cF2>System</span><span class=cF0>. Its heap is like kernel memory in other operating systems. Since </span><span class=cF2>Syste
<a name="l126"></a>m</span><span class=cF0> is immortal, it's safe to alloc objects, not tied to any mortal task, from </span><span class=cF2>System</span><span class=cF0>'s heap. It stays in a server mode, taking
<a name="l127"></a>requests, so you can ask it to </span><span class=cF2>#include</span><span class=cF0> something, placing that code system-wide. A funny story is that originally Terry
<a name="l128"></a>Davis called it the </span><span class=cF2>root</span><span class=cF0> task and even had a </span><span class=cF2>/Root</span><span class=cF0> directory :-) </span><span class=cF2>System</span><span class=cF0> executes </span><a href="https://zeal-operating-system.github.io/ZealOS/StartOS.ZC.html#l1"><span class=cF4>::/StartOS.ZC</span></a><span class=cF0> at boot time.
<a name="l129"></a>
<a name="l130"></a>For easy back-ups, place everything you author in your </span><span class=cF2>/Home</span><span class=cF0> directory and subdirectories. Then, use </span><a href="https://zeal-operating-system.github.io/ZealOS/System/BlkDev/ZDiskA.ZC.html#l145"><span class=cF4>CopyTree</span></a><span class=cF0>(). That
<a name="l131"></a>should make upgrading easy, too. Customizable start-up scripts go in your </span><span class=cF2>/Home</span><span class=cF0> directory. The default start-up scripts are
<a name="l132"></a>in the root directory. Copy the start-up files you wish to customize into </span><span class=cF2>/Home</span><span class=cF0> and modify them. See </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/GuideLines.DD.html#l29"><span class=cF4>Home Files</span></a><span class=cF0>. You can
<a name="l133"></a>make your own distro that includes everything and is a bootable live CD with </span><a href="https://zeal-operating-system.github.io/ZealOS/Misc/DoDistro.ZC.html#l1"><span class=cF4>::/Misc/DoDistro.ZC</span></a><span class=cF0>.
<a name="l134"></a>
<a name="l135"></a>Typically, your usage pattern through the day will be repeatedly left or right clicking on filenames in a cmd line </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDirB.ZC.html#l120"><span class=cF4>Dir</span></a><span class=cF0>()
<a name="l136"></a>listing. You left-click files to edit them and right-click to </span><span class=cF2>#include</span><span class=cF0> them. To begin a project, type </span><a href="https://zeal-operating-system.github.io/ZealOS/System/DolDoc/DocEd.ZC.html#l228"><span class=cF4>Ed</span></a><span class=cF0>(&quot;filename&quot;);,
<a name="l137"></a>supplying a filename. You can also run programs with </span><span class=cF2>&lt;F5&gt;</span><span class=cF0> when in the editor. </span><span class=cF2>&lt;ESC&gt;</span><span class=cF0> to save and exit the file. You'll
<a name="l138"></a>need to do a new </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDirB.ZC.html#l120"><span class=cF4>Dir</span></a><span class=cF0>() cmd, periodically, so make a macro on your PersonalMenu. Access your PersonalMenu by pressing </span><span class=cF2>&lt;CTRL-m&gt;</span><span class=cF0>,
<a name="l139"></a>cursoring until you are on top of it and pressing </span><span class=cF2>&lt;SPACE&gt;</span><span class=cF0>.
<a name="l140"></a>
<a name="l141"></a></span><span class=cF2>&lt;CTRL-t&gt;</span><span class=cF0> toggles plain text mode, showing format commands, a little like viewing html code.
<a name="l142"></a></span><span class=cF2>&lt;CTRL-l&gt;</span><span class=cF0> inserts a text widgets.
<a name="l143"></a></span><span class=cF2>&lt;CTRL-r&gt;</span><span class=cF0> inserts or edit a graphic sprite resource at cursor location.
<a name="l144"></a></span><span class=cF2>&lt;CTRL-d&gt;</span><span class=cF0> brings-up the file manager. It's pretty crappy. Terry found he didn't need it very often, believe it or not.
<a name="l145"></a></span><span class=cF2>&lt;CTRL-b&gt;</span><span class=cF0> toggles window border.
<a name="l146"></a>
<a name="l147"></a></span><span class=cF2>&lt;ALT-m&gt;</span><span class=cF0> maximizes a window.
<a name="l148"></a></span><span class=cF2>&lt;ALT-SHIFT-a&gt;</span><span class=cF0> closes AutoComplete.
<a name="l149"></a></span><span class=cF2>&lt;ALT-a&gt;</span><span class=cF0> brings back AutoComplete.
<a name="l150"></a></span><span class=cF2>&lt;ALT-v&gt;</span><span class=cF0> vertically tiles windows.
<a name="l151"></a></span><span class=cF2>&lt;ALT-h&gt;</span><span class=cF0> horizontally tiles windows.
<a name="l152"></a>The </span><span class=cF2>ALT</span><span class=cF0> keys are defined in </span><a href="https://zeal-operating-system.github.io/ZealOS/Home/HomeKeyPlugIns.ZC.html#l1"><span class=cF4>~/HomeKeyPlugIns.ZC</span></a><span class=cF0>. You can customize them.
<a name="l153"></a>
<a name="l154"></a></span><span class=cF2>&lt;CTRL-ALT-t&gt;</span><span class=cF0> new terminal window.
<a name="l155"></a></span><span class=cF2>&lt;CTRL-ALT-n&gt;</span><span class=cF0> switches to the next window.
<a name="l156"></a></span><span class=cF2>&lt;CTRL-ALT-x&gt;</span><span class=cF0> kills a window.
<a name="l157"></a></span><span class=cF4>
<a name="l158"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/System/Utils/Find.ZC.html#l166"><span class=cF4>Find</span></a><span class=cF0>() is your best friend. There's a wrapper function called </span><a href="https://zeal-operating-system.github.io/ZealOS/Home/HomeWrappers.ZC.html#l8"><span class=cF4>F</span></a><span class=cF0>() in your </span><span class=cF2>~/HomeWrappers.ZC</span><span class=cF0> file. Feel free to make wrapper
<a name="l159"></a>functions for functions you use often and customize the args. By the way, </span><a href="https://zeal-operating-system.github.io/ZealOS/System/Utils/Find.ZC.html#l166"><span class=cF4>Find</span></a><span class=cF0>() or </span><a href="https://zeal-operating-system.github.io/ZealOS/Home/HomeWrappers.ZC.html#l13"><span class=cF4>R</span></a><span class=cF0>() can be used to replace strings
<a name="l160"></a>across multiple files. You can access </span><a href="https://zeal-operating-system.github.io/ZealOS/System/Utils/Find.ZC.html#l166"><span class=cF4>Find</span></a><span class=cF0>() using </span><span class=cF2>&lt;CTRL-SHIFT-f&gt;</span><span class=cF0>.
<a name="l161"></a>
<a name="l162"></a>As you browse code, use the </span><span class=cF2>AutoComplete</span><span class=cF0> window to look-up functions, etc. </span><span class=cF2>&lt;CTRL-SHIFT-F1&gt;</span><span class=cF0> (or whatever number) to follow a
<a name="l163"></a>symbol to it's source. You can browse deeper and deeper. You go back with </span><span class=cF2>&lt;SHIFT-ESC&gt;</span><span class=cF0>.
<a name="l164"></a>
<a name="l165"></a>Use the </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/HelpIndex.DD.html#l1"><span class=cF4>Help &amp; Index</span></a><span class=cF0> or </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/DemoIndex.DD.html#l1"><span class=cF4>Demo Index</span></a><span class=cF0> to find-out what exists. Press </span><span class=cF2>&lt;F1&gt;</span><span class=cF0> for help or use the links on your menu (</span><span class=cF2>&lt;CTRL-m&gt;</span><span class=cF0>). Al
<a name="l166"></a>so, look in the </span><span class=cF2>/Demo</span><span class=cF0> or </span><span class=cF2>/Apps</span><span class=cF0> directories for inspiration.
<a name="l167"></a>
<a name="l168"></a>Software is distributed as </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/RedSea.DD.html#l1"><span class=cF4>RedSea</span></a><span class=cF0> ISO files. Burn a CD/DVD, or set your CD/DVD in </span><span class=cF2>QEMU</span><span class=cF0>, </span><span class=cF2>VMware</span><span class=cF0> or </span><span class=cF2>VirtualBox</span><span class=cF0> to the ISO file.
<a name="l169"></a> Then, access the </span><span class=cF2>'T'</span><span class=cF0> drive. Or, </span><a href="https://zeal-operating-system.github.io/ZealOS/System/BlkDev/Mount.ZC.html#l311"><span class=cF4>Mount</span></a><span class=cF0>() the ISO.C file and access the </span><span class=cF2>'M'</span><span class=cF0> drive in ZealOS. It must be a contiguous ISO.C
<a name="l170"></a>file, so rename it under ZealOS to ISO.C.
<a name="l171"></a>
<a name="l172"></a>Ideally, do not install applications such as games onto your hard drive because we wish to keep hard drive usage low, so the
<a name="l173"></a>whole </span><span class=cF2>'C'</span><span class=cF0> drive can be copied quickly to </span><span class=cF2>'D'</span><span class=cF0>. Also, the </span><a href="https://zeal-operating-system.github.io/ZealOS/System/BlkDev/FileMgr.ZC.html#l678"><span class=cF4>FileMgr</span></a><span class=cF0>() </span><span class=cF2>&lt;CTRL-d&gt;</span><span class=cF0> starts too slowly when there are lots of hard
<a name="l174"></a>drive files, but that is how we want it.
<a name="l175"></a>
<a name="l176"></a>3rd party libraries are banned, since they circumvent the 100,000 line of code limit in the </span><a href="https://zeal-operating-system.github.io/ZealOS/Doc/Charter.DD.html#l1"><span class=cF4>ZealOS Charter</span></a><span class=cF0>. All applications
<a name="l177"></a>must only depend on the core ZealOS files and whatever they bring along in the ISO. This is similar to how Commodore 64
<a name="l178"></a>applications only depended on the ROM.
<a name="l179"></a></span><span class=cF9>
<a name="l180"></a><u>Take Tour</span><span class=cF0>
<a name="l181"></a>
<a name="l182"></a></span><span class=cF8>
<a name="l183"></a></u>* &quot;Linux&quot; is a trademark owned by Linus Torvalds.
<a name="l184"></a>* &quot;Windows&quot; is a trademark owned by MicroSoft Corp.
<a name="l185"></a>* &quot;Commodore 64&quot; is a trademark owned by Polabe Holding NV.
<a name="l186"></a>* &quot;QEMU&quot; is a trademark owned by Fabrice Bellard.
<a name="l187"></a>* &quot;VMware&quot; is a trademark owned by VMware, Inc.
<a name="l188"></a>* &quot;VirtualBox&quot; is a trademark owned by Oracle.
<a name="l189"></a></span></pre></body>
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