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https://github.com/Zeal-Operating-System/ZealOS.git
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1b75d91002
Add arg to SATARep to specify drive types to show. Add checks in AHCIPortInit to verify port signatures, add helper method to get signatures from port.
89 lines
8.6 KiB
HTML
Executable file
89 lines
8.6 KiB
HTML
Executable file
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<meta name="generator" content="ZealOS V0.13">
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<pre style="font-family:monospace;font-size:12pt">
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<a name="l1"></a><span class=cF5> Quirks</span><span class=cF0>
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<a name="l2"></a>
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<a name="l3"></a>* You run a risk of problems if you do file operations on the same files simultaneously because there is <blink>no file
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<a name="l4"></a>sharing/locking mechanism</blink>. Generally, the last write wins.
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<a name="l5"></a>
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<a name="l6"></a>* When using </span><span class=cF2>FAT32</span><span class=cF0>, ZealOS does not generate unique short-entry names, the ones with the </span><span class=cF2>~</span><span class=cF0>s. Not all </span><span class=cF2>FAT32</span><span class=cF0> filenames are
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<a name="l7"></a>valid ZealOS names and it will complain. Do not access </span><span class=cF2>FAT32</span><span class=cF0> drives not dedicated to ZealOS. Disable them with </span><span class=cF4>
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<a name="l8"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskAddDev.CC.html#l195"><span class=cF4>DriveEnable</span></a><span class=cF0>(OFF), or they will generate error messages. </span><span class=cF2>FAT32</span><span class=cF0> involves a long and short name for each file.
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<a name="l9"></a>
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<a name="l10"></a>* The stack does not grow because virtual mem is not used. It is recommended that you allocate large local vars from the
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<a name="l11"></a>heap. You can change </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l3549"><span class=cF4>MEM_DEFAULT_STACK</span></a><span class=cF0> and recompile </span><span class=cF2>Kernel</span><span class=cF0> or request more when doing a </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KTask.CC.html#l264"><span class=cF4>Spawn</span></a><span class=cF0>().
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<a name="l12"></a>
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<a name="l13"></a>* The syntax highlighting occassionally glitches. The compiler doesn't.
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<a name="l14"></a>
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<a name="l15"></a>* Call </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDrive.CC.html#l269"><span class=cF4>DiskChange</span></a><span class=cF0>() when you insert a new removable media.
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<a name="l16"></a>
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<a name="l17"></a>* Accessing CD/DVD's is flacky. Try </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDrive.CC.html#l286"><span class=cF4>Drive</span></a><span class=cF0>() or </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDrive.CC.html#l269"><span class=cF4>DiskChange</span></a><span class=cF0>() twice.
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<a name="l18"></a>
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<a name="l19"></a>* You can only </span><span class=cF2>extern</span><span class=cF0> something once. There is a varient called </span><span class=cF2>_extern</span><span class=cF0> which binds a CosmiC definition to a asm sym. This,
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<a name="l20"></a>too, can only be done once.
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<a name="l21"></a>
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<a name="l22"></a>* A terminal task has a </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1502"><span class=cF4>CDoc</span></a><span class=cF0> document structure that remains active even when you change </span><span class=cF4>Fs->draw_it</span><span class=cF0>. To prevent links in
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<a name="l23"></a>the </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1502"><span class=cF4>CDoc</span></a><span class=cF0> from being activated when the user clicks in the window, do one of three things:
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<a name="l24"></a>
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<a name="l25"></a> A) </span><a href="https://zeal-operating-system.github.io/ZealOS/System/DolDoc/DocRecalcLib.CC.html#l121"><span class=cF4>DocBottom</span></a><span class=cF0>() followed by </span><a href="https://zeal-operating-system.github.io/ZealOS/System/DolDoc/DocRecalcLib.CC.html#l135"><span class=cF4>DocClear</span></a><span class=cF0>() to clear the </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1502"><span class=cF4>CDoc</span></a><span class=cF0> so it has no active widgets.
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<a name="l26"></a>
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<a name="l27"></a> B) Disable window mgr bttn click checking with </span><span class=cF4>Fs->win_inhibit</span><span class=cF0> set to mask </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1552"><span class=cF4>WIF_SELF_MS_L</span></a><span class=cF0>|</span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1566"><span class=cF4>WIF_FOCUS_TASK_MS_L_D</span></a><span class=cF0>|</span><span class=cF4>
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<a name="l28"></a> </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1554"><span class=cF4>WIF_SELF_MS_R</span></a><span class=cF0>|</span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l1568"><span class=cF4>WIF_FOCUS_TASK_MS_R_D</span></a><span class=cF0>. This inhibits window mgr operations but still generates messages from bttn clicks.
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<a name="l29"></a>
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<a name="l30"></a>* </span><span class=cF2>switch/case</span><span class=cF0> statements alloc a single jump table--do not use with wide, sparse ranges of case values.
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<a name="l31"></a>
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<a name="l32"></a>* Don't do a </span><span class=cF2>goto</span><span class=cF0> out of a </span><span class=cF2>try{}</span><span class=cF0>.
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<a name="l33"></a>
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<a name="l34"></a>* A </span><span class=cF2>goto</span><span class=cF0> label name must not match a global scope object's name. (It's not worth slowing-down the compiler to handle this
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<a name="l35"></a>case.)
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<a name="l36"></a>
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<a name="l37"></a>* </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelB.HH.html#l135"><span class=cF4>MemCopy</span></a><span class=cF0>() only goes forward.
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<a name="l38"></a>
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<a name="l39"></a>* A </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskDirB.CC.html#l9"><span class=cF4>Cd</span></a><span class=cF0>() cmd must be followed by two semicolons if a </span><span class=cF2>#include</span><span class=cF0> is after it. This is because the preprocessor processes the
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<a name="l40"></a>next token ahead.
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<a name="l41"></a>
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<a name="l42"></a>* The assembler's error messages are often off by a line and undefines are cryptic.
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<a name="l43"></a>
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<a name="l44"></a>* The last semicolon on the cmd line is converted to a double semicolon because the compiler looks ahead before doing a cmd.
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<a name="l45"></a>This normally has no negative effect, but when entering </span><span class=cF2>if</span><span class=cF0> statements with </span><span class=cF2>else</span><span class=cF0> clauses it presents problems.
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<a name="l46"></a>
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<a name="l47"></a>* You can do a </span><span class=cF2>class</span><span class=cF0> forward reference by using </span><span class=cF2>extern</span><span class=cF0> on the first declaration, but you can only do ptr references to the </span><span class=cF2>cla
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<a name="l48"></a>ss</span><span class=cF0>.
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<a name="l49"></a>
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<a name="l50"></a>* When doing something like
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<a name="l51"></a></span><span class=cF2> U0 Main()
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<a name="l52"></a> {
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<a name="l53"></a> U16 *_w = 0xA0000;
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<a name="l54"></a> *_w |= 0x8000;
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<a name="l55"></a> }
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<a name="l56"></a> </span><span class=cF0>The </span><span class=cF2>|=</span><span class=cF0> will be coded as a </span><span class=cF2>U32 Bts</span><span class=cF0> instruction resulting in a </span><span class=cF2>U32</span><span class=cF0> access instead of a </span><span class=cF2>U16</span><span class=cF0> access. This affects some hardware
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<a name="l57"></a> operations.
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<a name="l58"></a>
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<a name="l59"></a>* Compiler warning or error message line numbers will be off if you have a block of word-wrapped comments. You might press </span><span class=cF2><C
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<a name="l60"></a>TRL-t></span><span class=cF0> before doing an editor goto-line-number command.
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</span></pre></body>
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