Update README.md

README.md

@@ -70,6 +70,8 @@ The SF2000 uses a Switch-style thumb stick that does _not_ depress for L2/R2. It
 ### Battery
 The SF2000 takes a 18650 type rechargeable battery, which is easily user replaceable (it's behind a battery door with a screw), and comes with a 1,500mAh one which runs for about 4 hours. 18650 batteries with and without "nubs" both fit fine. The console has built-in over-charge protection, but _does not have under-charge protection, so for safety do not leave the console turned on when the battery is low_. From when it displays a full-screen low battery indicator, it takes about 3.5 hours to charge the stock battery. The green charging light does _not_ turn off when fully charged.
 
+Also note that while you can technically charge the SF2000 while it is powered on, doing so using a charger that supports fast charging or power delivery has a high chance of blowing the charging module IC and killing the device (multiple community reports). For safest charging, use a charger that only supports a maximum output of 5v.
+
 ### Wireless Connectivity
 The SF2000 does not feature wifi or Bluetooth, but it _does_ have a 2.4Ghz antenna to support local wireless multiplayer using a compatible 2.4Ghz wireless controller for Player 2. The Y2 SFC wireless controller and the SF900 wireless controller have both been reported to work fine.
 
@@ -350,12 +352,12 @@ And here's my current understanding of what each line is used for:
 - `SF2000`: The name of the device; I don't believe it's actively used anywhere, please correct me if I'm wrong!
 - `17`: The number of languages supported by the firmware
 - `FFFFFF`: Hexadecimal colour (RGB) for the general game-list texts, and the `x/yyy` game count in the top-right corner of each game-list
-- `FF8000 ROMS`: The first defined main menu section (the sections that are scrolled vertically on the main menu). Internally they are numbered from 0; so the `ROMS` section (user ROMs and settings) is 0, `FC` (NES) is 1, `SFC` (SNES) is 2, etc.. The `FF8000` is the hexadecimal colour (RGB) to display the text of the currently selected/highlighted game in the list; the default colour is orange. _Side note:_ after the `ARCADE` section, there's two additional `ROMS` sections; this is just a guess on my part, but I think the firmware is hard-coded to have ten sections. The SF2000 appears to share its firmware with other similar devices, and some of those devices feature different menu sections (e.g., "CPS1", "Neo Geo", etc.). I suspect that the best of those systems has ten sections in its main menu, which doesn't match up with the eight sections on the SF2000 (seven supported systems + the user ROMs/settings section). As the firmware requires ten sections to be defined, they just repeated the `ROMS` section to fill in the remaining places. Like I say, that's just a guess!
+- `FF8000 ROMS`: The first defined main menu section (the sections that are scrolled vertically on the main menu). Internally they are numbered from 0; so the `ROMS` section (user ROMs and settings) is 0, `FC` (NES) is 1, `SFC` (SNES) is 2, etc.. The `FF8000` is the hexadecimal colour (RGB) to display the text of the currently selected/highlighted game in the list; the default colour is orange. _Side note:_ after the `ARCADE` section, there's two additional `ROMS` sections; the firmware is hard-coded to have ten sections. The SF2000 appears to share its firmware with other similar devices, and some of those devices feature different menu sections (e.g., "CPS1", "Neo Geo", etc.). I suspect that the best of those systems has ten sections in its main menu, which doesn't match up with the eight sections on the SF2000 (seven supported systems + the user ROMs/settings section). As the firmware requires ten sections to be defined, they just repeated the `ROMS` section to fill in the remaining places. Like I say, that's just a guess!
 - `8 7 0`: This is used to control the main menu rotation. `8` tells the firmware how many main menu sections are actually in-use on this device; for the SF2000 that's seven supported consoles + the user ROMs/settings section, for eight total. `7` tells the firmware which menu section to default to when the device boots up, which is why by default it always starts in the `ARCADE` section. `0` tells the firmware which section to display the special "user settings" menu on (the one with History, Favourites, TV System, Language, etc.). So for example, if you wanted the SF2000 to start up on the user ROMs/settings screen instead of Arcade, you could change this line to read `8 0 0`
 - `24 184 144 208`: These numbers control the position and size of the game artwork in each system's game-list. The first two numbers are the X and Y coordinates from the top-left corner of the screen for where to start drawing the artwork; the second two numbers are the width and height of the artwork to draw. Note that the SF2000 doesn't do any image scaling; the dimensions are for the rectangular area the device will begin adding each pixel of the source artwork to. If the artwork's dimensions don't exactly match the dimensions specified here, the artwork will not display properly
 - `40 24`: The width and height of the icon shown beside the currently selected/highlighted game in a game-list. Again, these are the dimensions of the rectangular area the SF2000 draws the pixel data into, so if these numbers don't match the dimensions of the list indicator image, the image will not display properly
 
-NOTE: While the text colours above work just fine with the SF2000 _first_ boots up, after loading a game and returning to the menu some text colours revert to default, and are likely being pulled from inside the BIOS somewhere.
+NOTE: While the text colours above work just fine with the SF2000 _first_ boots up, after loading a game and returning to the menu the general game-list/game count colour reverts to an off-white colour, and is likely being pulled from inside the BIOS somewhere. Also note that currently there is no way to choose a highlight colour for the Favourites or History sections - those are fixed at the stock orange colour (FF8000), and are almost certainly hardcoded in the BIOS as well.
 
 
 ### ROM Lists
@@ -370,7 +372,7 @@ Credit for this section goes to `taizou#9644`, author of [FROGTOOL](https://gith
 | `TSMFK.TAX` | This is a ROM list file similar to the other `.tax` files, except it is built at run-time from the ROM files in the user roms folder. The file is regenerated each time the device boots |
 
 ### Sounds
-There are several sound files in the `20230420` firmware, stored in raw signed 16-bit PCM format (mono, little-endian at 22050 Hz). The SF2000 seems to play the files back at an incorrect sample rate vs. the raw data; if you want to customise the background music, resample your audio to 21543 Hz, and then speed the audio up to 22050 Hz, using the resulting audio as the raw data (credit to `notv37#4200` in Discord for doing the math on that).
+There are several sound files in the `20230420` firmware, stored in raw signed 16-bit PCM format (mono, little-endian at 22050 Hz). The SF2000 seems to play the files back at an incorrect sample rate vs. the raw data; if you want to customise the background music, resample your audio to 21560 Hz (21561.1 Hz is technically precise, but 21560 Hz is easer to remember, and all but the most exacting of human ears is unlikely to detect the difference), and then speed the audio up to 22050 Hz, using the resulting audio as the raw data (credit to `notv37#4200` in Discord for doing the initial discovery math, and to ``osaka#9664` for doing technical follow-up in the firmware - you can [read their deep-dive into the details here](https://discord.com/channels/741895796315914271/1099465777825972347/1112643797344583710) (Discord link)).
 
 If you want to do it using [Audacity](https://www.audacityteam.org/) , the steps are:
 
@@ -427,6 +429,8 @@ All of these are linked above already in their relevant sections, but just in ca
 ---
 
 ## Version History
+- `20230529 - 1.14`: Updated the main menu BGM sample rate details with the latest findings from `osaka#9664`. Clarified which menu text colour resets after exiting a game. Added a note about charging safety (thanks for your sacrifices, `Zerter#4954`! 🫡)
+
 - `20230526 - 1.13`: Updated Audacity instructions to support latest version of Audacity. Added a BIOS CRC32 patcher tool for the reckless and brave. Added a note about `Foldername.ini` text colours reverting after loading a game (thanks `Zerter#4954`!)
 
 - `20230525 - 1.12`: Added a section about the internals of the `Foldername.ini` file. Added a note to the Arcade section about the "inrom" column in `adcockm#8175`'s metadata document. Added a small firmware note for the May 22nd about community-spotted GBA performance improvements. Added specific emulator versions and Git commit links for each emulator (thanks `osaka#9664` and `notv37#4200`!). Added specific steps for producting SF2000-format audio files using Audacity.