diff --git a/src/Make_ro.mak b/src/Make_ro.mak
new file mode 100644
index 0000000..6ac2f94
--- /dev/null
+++ b/src/Make_ro.mak
@@ -0,0 +1,168 @@
+#
+# Makefile for Vim on RISC OS - Andy Wingate
+#
+
+GCC	    = gcc -mthrowback
+CFLAGS	   = -DRISCOS -DFEAT_GUI
+# Optimising on ex_docmd.c seems to cause segfaults on compilation. Needs investigation.
+CCEX_DOCMD = $(GCC) $(CFLAGS)
+CC	   = $(GCC) $(CFLAGS) -O2
+# -DUP_BC_PC_EXTERN for term.c needed as BC defined in termlib.c and term.c
+
+TERMFLAG   = -DUP_BC_PC_EXTERN
+
+ASMFLAGS   = -throwback -objasm -gcc
+
+OBJS =  o.buffer o.charset o.digraph o.edit o.eval o.ex_cmds o.ex_cmds2 o.diff \
+	o.ex_docmd o.ex_eval o.ex_getln o.fileio o.fold o.getchar o.main o.mark o.mbyte  \
+	o.memfile o.memline o.menu o.message o.misc1 o.misc2 o.move     \
+	o.normal o.ops o.option o.quickfix o.regexp o.screen o.search   \
+	o.syntax o.tag o.term o.termlib o.ui o.undo o.version o.window  \
+	o.os_riscos o.swis o.gui o.gui_riscos
+
+Vim: $(OBJS)
+	$(GCC) -o Vim $(OBJS)
+
+install: Vim
+	squeeze -v Vim @.!Vim.Vim
+
+clean:
+	create o.!fake! 0
+	wipe o.* ~cf
+	remove Vim
+
+o.swis: s.swis
+	as $(ASMFLAGS) -o o.swis s.swis
+
+# Rules for object files
+# You shouldn't need to put all this information in as all but term.c have the same
+# rule (and only then to save extra defines) but some versions of make are awkward.
+
+o.buffer:	c.buffer
+	$(CC) -c c.buffer -o o.buffer
+
+o.charset:	c.charset
+	$(CC) -c c.charset -o o.charset
+
+o.digraph:	c.digraph
+	$(CC) -c c.digraph -o o.digraph
+
+o.diff:		c.diff
+	$(CC) -c c.diff -o o.diff
+
+o.edit:		c.edit
+	$(CC) -c c.edit -o o.edit
+
+o.eval:		c.eval
+	$(CC) -c c.eval -o o.eval
+
+o.ex_cmds:	c.ex_cmds
+	$(CC) -c c.ex_cmds -o o.ex_cmds
+
+o.ex_cmds2:	c.ex_cmds2
+	$(CC) -c c.ex_cmds2 -o o.ex_cmds2
+
+o.ex_docmd:	c.ex_docmd
+	$(CCEX_DOCMD) -c c.ex_docmd -o o.ex_docmd
+
+o.ex_eval:	c.ex_eval
+	$(CCEX_DOCMD) -c c.ex_eval -o o.ex_eval
+
+o.ex_getln:	c.ex_getln
+	$(CC) -c c.ex_getln -o o.ex_getln
+
+o.fileio:	c.fileio
+	$(CC) -c c.fileio -o o.fileio
+
+o.fold:		c.fold
+	$(CC) -c c.fold -o o.fold
+
+o.getchar:	c.getchar
+	$(CC) -c c.getchar -o o.getchar
+
+o.gui:		c.gui
+	$(CC) -c c.gui -o o.gui
+
+o.gui_riscos:	c.gui_riscos
+	$(CC) -c c.gui_riscos -o o.gui_riscos
+
+o.main:		c.main
+	$(CC) -c c.main -o o.main
+
+o.mark:		c.mark
+	$(CC) -c c.mark -o o.mark
+
+o.mbyte:	c.mbyte
+	$(CC) -c c.mbyte -o o.mbyte
+
+o.memfile:	c.memfile
+	$(CC) -c c.memfile -o o.memfile
+
+o.memline:	c.memline
+	$(CC) -c c.memline -o o.memline
+
+o.menu:		c.menu
+	$(CC) -c c.menu -o o.menu
+
+o.message:	c.message
+	$(CC) -c c.message -o o.message
+
+o.misc1:	c.misc1
+	$(CC) -c c.misc1 -o o.misc1
+
+o.misc2:	c.misc2
+	$(CC) -c c.misc2 -o o.misc2
+
+o.move:		c.move
+	$(CC) -c c.move -o o.move
+
+o.normal:	c.normal
+	$(CC) -c c.normal -o o.normal
+
+o.ops:		c.ops
+	$(CC) -c c.ops -o o.ops
+
+o.option:	c.option
+	$(CC) -c c.option -o o.option
+
+o.os_riscos:	c.os_riscos
+	$(CC) -c c.os_riscos -o o.os_riscos
+
+o.pty:		c.pty
+	$(CC) -c c.pty -o p.pty
+
+o.quickfix:	c.quickfix
+	$(CC) -c c.quickfix -o o.quickfix
+
+o.regexp:	c.regexp
+	$(CC) -c c.regexp -o o.regexp
+
+o.screen:	c.screen
+	$(CC) -c c.screen -o o.screen
+
+o.search:	c.search
+	$(CC) -c c.search -o o.search
+
+o.syntax:	c.syntax
+	$(CC) -c c.syntax -o o.syntax
+
+o.tag:		c.tag
+	$(CC) -c c.tag -o o.tag
+
+o.term:		c.term
+	$(CC) $(TERMFLAG) -c c.term -o o.term
+
+o.termlib:	c.termlib
+	$(CC) -c c.termlib -o o.termlib
+
+o.ui:		c.ui
+	$(CC) -c c.ui -o o.ui
+
+o.undo:		c.undo
+	$(CC) -c c.undo -o o.undo
+
+o.version:	c.version
+	$(CC) -c c.version -o o.version
+
+o.window:	c.window
+	$(CC) -c c.window -o o.window