Add new notes, fix minor issues

notes/browsers.md

@@ -21,7 +21,7 @@ Product/Service-specific Extensions:
 - [Firefox Source Docs](https://firefox-source-docs.mozilla.org/)
 
 ### Reducing UI element padding
-- Go to [about:config](about:config)
+- Go to the browser's [about\:config](#) page
 - Set `browser.uidensity` equal to `1`
 
 ## Safari

notes/lua.md

@@ -0,0 +1,68 @@
+# Lua Programming Language
+
+## Lua 5.4 C API
+
+
+## Lua 5.4 Bytecode
+
+> [!note]
+> These are **unstable** and may differ in different versions of the language.
+> They are not part of the language specification but an implementation detail, which in this case is the reference implementation.
+
+> [!note]
+> The reference implementation used to have a stack based but now uses a register based VM similar to how modern real computer architectures.
+
+The instructions are 32 bits wide; every instruction has an opcode that takes up 7 bits, which leaves out 25 bits for the addresses and values.
+
+The instructions work with three register referred to as: A, B, C; each are of length 8 bits.
+
+<table>
+<thead>
+<tr>
+<th></th>
+<th>31</th><th>...</th><th>24</th><th>23</th><th>...</th><th>16</th><th>15</th><th>14</th><th>...</th><th>7</th><th>6</th><th>...</th><th>0</th>
+</tr>
+</thead>
+<tr>
+<td>iABC</td>
+<td colspan='3' style='text-align:center'>C (8 bits)</td>
+<td colspan='3' style='text-align:center'>B (8 bits)</td>
+<td style='text-align:center'>k (1 bit)</td>
+<td colspan='3' style='text-align:center'>A (8 bits)</td>
+<td colspan='3' style='text-align:center'>OP (7 bits)</td>
+</tr>
+<tr>
+<td>iABx</td>
+<td colspan='7' style='text-align:center'>B (17 bits)</td>
+<td colspan='3' style='text-align:center'>A (8 bits)</td>
+<td colspan='3' style='text-align:center'>OP (7 bits)</td>
+</tr>
+<tr>
+<td>iAsBx</td>
+<td colspan='7' style='text-align:center'>signed B 17 bits)</td>
+<td colspan='3' style='text-align:center'>A (8 bits)</td>
+<td colspan='3' style='text-align:center'>OP (7 bits)</td>
+</tr>
+<tr>
+<td>iAx</td>
+<td colspan='10' style='text-align:center'>Ax (25 bits)</td>
+<td colspan='3' style='text-align:center'>OP (7 bits)</td>
+</tr>
+<tr>
+<td>sJ</td>
+<td colspan='10' style='text-align:center'>signed jump address (25 bits)</td>
+<td colspan='3' style='text-align:center'>OP (7 bits)</td>
+</tr>
+</table>
+
+```lua
+-- arithmetic to calculate the lengths used from https://www.lua.org/source/5.4/lopcodes.h.html
+A = 8
+B = 8
+C = 8
+Bx = A + B + 1  -- 17
+Ax = A + Bx     -- 25
+sJ = A + Bx     -- 25
+```
+This page contains excerpts from Lua's source code which is the copyright of Lua.org, PUC-Rio and is licensed under the MIT License.
+[lua.org/license.html](https://www.lua.org/license.html)

notes/os.md

@@ -0,0 +1,40 @@
+# Operating Systems
+## Windows
+
+### Package Managers
+
+- Chocolatey
+    - requires Administrator permissions
+- Winget
+    - comes with Windows
+    - (it doesn't work half of the time for me)
+
+### Mounting ISO, CUE images
+
+Windows versions 8 and above natively support mounting ISOs. However CUE images are not supported. 
+WinCDEmu is a lightweight, open-source disc emulator that supports mounting CUE, NRG, IMG, ISO, etc. images. 
+- [WinCDEmu Website](https://wincdemu.sysprogs.org/)
+- [Source (GitHub)](https://github.com/sysprogs/WinCDEmu)
+- [Portable Version](https://wincdemu.sysprogs.org/portable/)
+
+### Master Control Panel / God Mode
+(Misnomer; you probably won't use this either) 
+
+Shows a list of all the available settings on Windows in a single view.
+
+Open it by exceuting the following command or saving it as a shortcut: `explorer.exe shell:::{ED7BA470-8E54-465E-825C-99712043E01C}`
+
+## MacOS
+
+### Package Manager
+
+- [HomeBrew](https://brew.sh)
+    - package manager everyone uses but it is noticeably slow
+
+### Video Players
+
+- IINA
+    - video player based on mpv with native macOS UI
+- mpv
+    - mpv doesn't have a brew cask for Apple silicon; stolen-mpv exists but it is x86 only
+    - mpv brew formula is the cli tool which works pretty well but it is not as nice as packaged applications