Adapted from huuan_huynh's EDFC Everdrive N 8 China Clone Mapper Update.

What he did was try to port 027.RBF and 037.RBF from nesos-v20-beta1 to OS v13.

Spoiler: IT DOESN'T WORK

Here's the latest revision:

005.RBF as of Oct 26, 2023
 - MMC5 expansion audio included
 - Corrected MMC5 pulse channel duties
 - Primary default for OS v13
 - Less compatibility with famiclones/CPUs that are not cycle accurate [ if CPU clock frequency is NOT equivalent to 1.789773 (NTSC 1.79 Mhz) or 1.662607 MHz (PAL 1.66 Mhz), issues will appear]
 - Not all MMC5 games will work

024.RBF
- Uses Slamy's VRC6 mapper mod 24Mod_35_35.RBF
- **For the AV Famicom and EDN8-Fami the 35_35 file is most balanced.**
- Other flashfiles are included as each mod volume difffers per famiclone/famicom
- Incomplete extended audio issue is NES / Famicom / Famiclone hardware dependent. Refer to: https://www.retrorgb.com/av-famicom-hvc-101-audio-balance-restoration-mod.html
- You may need to mod your NES. http://www.retrofixes.com/2014/05/open-hidden-sound-channels-in-nes.html

030.RBF (Experimental)
- Include's Bananmos' Everdrive Mapper 30 v1 by default, but cannot save to sdcard. You can change this if you like
- Mapper 30 v1 works best for OS v13. Test ROM "Blackbox Challenge" has problems on the main menu, but the rest of the game works flawlessly without sdcard saves - sadly.
- Other flashfiles are included as each mapper file compatibility somehow differs per EDN8 OS

031.RBF
- Rainwarrior's custom mapper 31 for OS v13

069.RBF
- Uses Necronomfive's Sunsof5 custom mapper v4
 -> Mapper supports LO/HI mixing volume settings from OSv13's configuration menu
 -> Works great on AV Famicom, but it's slightly too quiet on defaults on the AVS

085.RBF
- Uses Necronomfive's VRC7 mapper
	- Not a VRC7 anymore, but a full Yamaha YM2413
	- 9 channels of FM sound
	- 5 rhythm channels
- Core can be switched between VRC7 and YM2413 instrument ROMs! (set / erase bit 6 of $E000)
- Supports flash save

111.RBF (Experimental)
- Uses "Broke Studio's" GTROM/Cheapocabra mapper for Everdrive N8

Mappers 71, 189, 191, 205, and 207 are ported, but not all of these implementations are stable on certain clones.
 > Do refer to the "Workarounds.txt"

Mapper 220
 - Does not exist for EDFC N8 OS v9.1 and below.
 - Removed. This was mistakenly mapped in the mapper table