System Version Title

The FS for the system-version title(TID 0100000000000809) contains "/file" (and, with [5.0.0+], "/digest"):

Offset	Size	Description
0x0	0x1	Major
0x1	0x1	Minor
0x2	0x1	Micro
0x3	0x1	Unknown/Build?
0x4	0x1	Revision Number
0x5	0x3	Normally all-zero. Padding?
0x8	0x20	Platform string ("NX" with zeros afterwards)
0x28	0x40	Hex ASCII string. 0x28-bytes(not including NUL-terminator) normally with zeros afterwards. The value of this string differs from 2.0.0 and 2.1.0.
0x68	0x18	System-version in string form with zeros afterwards. For example: "2.1.0". This is what is displayed in System settings.
0x80	0x80	ASCII string with zeros / padding afterwards. For example: "NintendoSDK Firmware for NX 2.0.0-15"

Known Versions

Retail Firmware Updates

Firmware	Version String	Hex ASCII String	"/digest" contents
1.0.0	NintendoSDK Firmware for NX 1.0.0-15	84b8da475a02261c456e6472b403b31416480165	N/A
2.0.0	NintendoSDK Firmware for NX 2.0.0-15	25233e518f580062b41f45fae7ce56bff261094a	N/A
2.1.0	NintendoSDK Firmware for NX 2.1.0-0	e548f82b0aaff5fd18cfd80e7b9bd9808eeb7c99	N/A
2.2.0	NintendoSDK Firmware for NX 2.2.0-1	c83b637205048e61e73c870f21271cc3c6364396	N/A
2.3.0	NintendoSDK Firmware for NX 2.3.0-0	3ed3bbc8885b6362f4f244dcecd2b430fa27310e	N/A
3.0.0	NintendoSDK Firmware for NX 3.0.0-10.0	7fbde2b0bba4d14107bf836e4643043d9f6c8e47	N/A
3.0.1	NintendoSDK Firmware for NX 3.0.1-0.0	a3363e086791370ed89dca69c697b4a8bc443d66	N/A
3.0.2	NintendoSDK Firmware for NX 3.0.2-0.0	56bc7f71d0e13179ccb6543bbb33d7f537859e49	N/A
4.0.0	NintendoSDK Firmware for NX 4.0.0-4.0	875be0f6edc29b23938b7aea50764421b9f217e5	N/A
4.0.1	NintendoSDK Firmware for NX 4.0.1-0.0	826588c45cecab1672c46f5de87d83ea6008d583	N/A
4.1.0	NintendoSDK Firmware for NX 4.1.0-0.0	314f9468b704e84e1ffed449dfa6108ba4be221d	N/A
5.0.0	NintendoSDK Firmware for NX 5.0.0-3.0	66790aa646927601523df36a6750205cd944b3de	gW93A#00050000#QRnTiv2kqQV-KO9DAn1Wzz4S2-SDH4Zd10y8Jx5KalI=
5.0.1	NintendoSDK Firmware for NX 5.0.1-0.0	4b51b56242cc388ef487e148048e2c80e25994ad	gW93A#00050001#wBt05i54vmIPr7cs44Vvod3M9s5M2Yl2ZVd_pd036MY=
5.1.0	NintendoSDK Firmware for NX 5.1.0-3.0	23f9df53e25709d756e0c76effcb2473bd3447dd	gW93A#00050100#29uVhARHOdeTZmfdPnP785egrfRbPUW5n3IAACuHoPw=
6.0.0	NintendoSDK Firmware for NX 6.0.0-5.0	ef435c4fcf83831d535424f6fc28e6c91f7669d1	gW93A#00060000#9k9lgdev3glK0ltQTdWmdK7jU1BL9oWNJRAFkQpHUYI=
6.0.1	NintendoSDK Firmware for NX 6.0.1-1.0	880a0ba230a9b9225a87abe1de6c8ab8d832551e	gW93A#00060001#a4EXpeev_mWNw7Dk0vkOsCMIxlosx2JuXPiOa5hEMd0=

Other

Firmware	Version String	Hex ASCII String	Note
2.0.0-2	NintendoSDK Firmware for NX 2.0.0-2	665fafc03935d12eebba8060a135516b021ccbaa	Revision of factory firmware.
2.0.0-13	NintendoSDK Firmware for NX 2.0.0-13	60b5fa391b0055f50fec362d29ac18395f387412	Revision of factory firmware.
3.0.0	NintendoSDK Firmware for NX 3.0.0-10.0	83480e96a810a6c7cd3a8fb58dfb5b53961ac781	Revision of factory firmware.
6.0.0-4.0	NintendoSDK Firmware for NX 6.0.0-4.0	5dc1909aea612d7a444884faca584fa8ae895b5c	Pre-release version of firmware 6.0.0.