These got lost somehow.

gdb/config/m68k/monitor.mt

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+# Target: Motorola rom68k boot monitor (from Integrated Systems)
+# Target: Motorola bug monitor.
+# These defines should give you a gdb running on anything that will be able to
+# communicate with a m68k based debug monitor.  Communications
+# is facilitated via either a serial line, or a TCP or TELNET connection to
+# a serial line on a terminal multiplexor.
+TDEPFILES= exec.o m68k-pinsn.o m68k-tdep.o remote-monitor.o
+TM_FILE= tm-monitor.h

gdb/config/m68k/tm-monitor.h

@@ -0,0 +1,35 @@
+/* Parameters for the Integrated Systems Rom68k boot monitor
+   Copyright (C) 1986, 1987, 1989, 199 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#undef HAVE_68881		/* GDB won't compile without this */
+
+#define GDBINIT_FILENAME        ".monitor-gdbinit"
+
+#define DEFAULT_PROMPT          "(remote-gdb) "
+
+#include "m68k/tm-m68k.h"
+
+#undef REGISTER_NAMES
+#define REGISTER_NAMES  \
+ {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
+  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "usp", \
+  "sr", "pc",  \
+  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
+  "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
+