Readme changes

README.md

@@ -1,2 +1,19 @@
 # snesclassic.dualboot
-A quick tool to convert a NESC firmware dump into a HMOD file to be installed via hakchi2 on a SNESC
+A quick tool to convert an NES Classic firmware dump into a HMOD file to be installed via hakchi2 onto a SNES Classic. Once installed, you will have a menu item to switch to the NES Classic Menu, and another to switch back from the NES Classic Menu to the SNES Classic menu. In NES mode, all features of the original NES Classic work as expected (save states, screen filters, GUI, etc.).
+
+### Usage
+
+* Download an NES Classic dump file. The filename *must* be one of the following, as this is used to determine what patches to apply to binary files:
+  * dp-nes-release-v1.0.2-0-g99e37e1.tar.gz (US/EUR)
+  * dp-nes-release-v1.0.3-0-gc4c703b.tar.gz (US/EUR)
+  * dp-hvc-release-v1.0.5-0-g2f04d11.tar.gz (JPN)
+* Put the NES Classic dump file into the "dump" folder
+* Run the application. It will auto-detect one of the above 3 files and extract it, then generate an HMOD.
+* Copy the .hmod folder to the user_mods folder in hakchi2, then install it.
+
+### Caveats / Known Issues
+
+* After switching menus, you'll get a C8 when you flip the power switch. *Flip it again to power down as normal, or just pull the power plug*.
+* The physical reset switch gives you a C7 error in NESC mode. Use the button combo for reset instead (select + down by default with a customer kernel).
+* Syncing games in hakchi2 breaks the NESC installation due to how much it wipes away during sync (it doesn't just wipe away the launcher games). I won't be patching this right now, you'll need to install this module after you install all your games, or re-install it when you want to add new games to the SNESC menu.
+* If you install the Japanese NESC dump, you'll be prompted to select your language again each time you launch the SNESC menu. Everything works otherwise, and no data is wiped, but you will be prompted each time.