NOTICE: list the serial-bus fixes of 2026-10-15

CIOUT's buffer, CLOSE's LISTEN/CLOSE/UNLISTEN, CHKIN's and CHKOUT's
secondary address, and TKSA's secondary address.

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, 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 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.
 
 Changes:
 
@@ -11,6 +11,14 @@ Changes:
   own config ID ($6D), the brand "MC64", and BCD_SAFE_INTERRUPTS turned off.
 - Makefile: targets for that configuration, build/kernal_mc64.rom and build/basic_mc64.rom,
   made the same way as the c64 ones.
+- src/kernal/iec/ciout.s (2026-10-15): CIOUT buffers its byte in TBTCNT, where the send
+  routine takes it from, not in BSOUR (upstream PR #113).
+- src/kernal/iec/close_iec.s (2026-10-15): CLOSE sends LISTEN, $E0 plus the secondary
+  address, and UNLISTEN; it sent a command ORed with zero page $E0 and no LISTEN.
+- src/kernal/iec/chkin_iec.s, ckout_iec.s (2026-10-15): CHKIN and CHKOUT take the secondary
+  address from SAT, not from LAT, the logical file numbers.
+- src/kernal/iec/tksa.s (2026-10-15): TKSA sends the secondary address it is given, without
+  ORing $90 into it (upstream issue #116).
 - NOTICE: this file.
 
 The licence terms are unchanged; see LICENSE, COPYING, and COPYING.LESSER.