NOTICE: list the Arnitech controller option

NOTICE

@@ -1,9 +1,9 @@
 This is a modified version of MEGA65 Open ROMs (https://github.com/MEGA65/open-roms),
 forked at upstream commit ad178dbe4d48cd6a317737a8e0e7e662f7e33d32.
 
-Modified by Christian Werner, 2026-10-14 and 2026-10-15, for the mc64 computers of
-arnitech, a set of Minecraft mods (https://git.susdog.de/chris/arnitech). The fork lives
-at https://git.susdog.de/chris/open-roms, branch mc64.
+Modified by Christian Werner, 2026-10-14, 2026-10-15, and 2026-10-17, for the mc64
+computers of arnitech, a set of Minecraft mods (https://git.susdog.de/chris/arnitech). The
+fork lives at https://git.susdog.de/chris/open-roms, branch mc64.
 
 Changes:
 
@@ -28,6 +28,12 @@ Changes:
   UNTALK none does, and then left CLK pulled.
 - src/kernal/iec/iec_return.s (2026-10-15): a serial routine that finds no device releases
   CLK, DATA, and ATN; it left CLK pulled.
+- src/,,config_mc64.s, src/aliases/,aliases_hardware_arnitech.s, src/kernal/arnitech/
+  (new), Makefile, src/kernal/init/fda3.ioinit.s, CONFIG.md (2026-10-17): a new option,
+  ARNITECH_CONTROLLER, on in the mc64 configuration only. IOINIT sets CIA #1's TOD on 50 Hz
+  and, if the Arnitech controller's signature is at $DE80, from the controller's clock. The
+  Arnitech jump table at $FF00 wraps the controller's registers: "ARNI", a version, an entry
+  count, and JMPs from $FF06 to find a Card by its type and to set the TOD.
 - NOTICE: this file.
 
 The licence terms are unchanged; see LICENSE, COPYING, and COPYING.LESSER.