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+
+#------------------------------------------------------------------------------
+# $File: acorn,v 1.5 2009/09/19 16:28:07 christos Exp $
+# acorn:  file(1) magic for files found on Acorn systems
+#
+
+# RISC OS Chunk File Format
+# From RISC OS Programmer's Reference Manual, Appendix D
+# We guess the file type from the type of the first chunk.
+0	lelong		0xc3cbc6c5	RISC OS Chunk data
+>12	string		OBJ_		\b, AOF object
+>12	string		LIB_		\b, ALF library
+
+# RISC OS AIF, contains "SWI OS_Exit" at offset 16.
+16	lelong		0xef000011	RISC OS AIF executable
+
+# RISC OS Draw files
+# From RISC OS Programmer's Reference Manual, Appendix E
+0	string 		Draw		RISC OS Draw file data
+
+# RISC OS new format font files
+# From RISC OS Programmer's Reference Manual, Appendix E
+0	string		FONT\0		RISC OS outline font data,
+>5	byte		x		version %d
+0	string		FONT\1		RISC OS 1bpp font data,
+>5	byte		x		version %d
+0	string		FONT\4		RISC OS 4bpp font data
+>5	byte		x		version %d
+
+# RISC OS Music files
+# From RISC OS Programmer's Reference Manual, Appendix E
+0	string		Maestro\r	RISC OS music file
+>8	byte		x		version %d
+
+>8	byte		x		type %d
+
+# Digital Symphony data files
+# From: Bernard Jungen (bern8817@euphonynet.be)
+0		string	\x02\x01\x13\x13\x13\x01\x0d\x10	Digital Symphony sound sample (RISC OS),
+>8		byte	x	version %d,
+>9		pstring	x	named "%s",
+>(9.b+19)	byte	=0	8-bit logarithmic
+>(9.b+19)	byte	=1	LZW-compressed linear
+>(9.b+19)	byte	=2	8-bit linear signed
+>(9.b+19)	byte	=3	16-bit linear signed
+>(9.b+19)	byte	=4	SigmaDelta-compressed linear
+>(9.b+19)	byte	=5	SigmaDelta-compressed logarithmic
+>(9.b+19)	byte	>5	unknown format
+
+0	string	\x02\x01\x13\x13\x14\x12\x01\x0b	Digital Symphony song (RISC OS),
+>8	byte	x	version %d,
+>9	byte	=1	1 voice,
+>9	byte	!1	%d voices,
+>10	leshort	=1	1 track,
+>10	leshort	!1	%d tracks,
+>12	leshort	=1	1 pattern
+>12	leshort	!1	%d patterns
+
+0	string	\x02\x01\x13\x13\x10\x14\x12\x0e
+>9	byte	=0	Digital Symphony sequence (RISC OS),
+>>8	byte	x	version %d,
+>>10	byte	=1	1 line,
+>>10	byte	!1	%d lines,
+>>11	leshort	=1	1 position
+>>11	leshort	!1	%d positions
+>9	byte	=1	Digital Symphony pattern data (RISC OS),
+>>8	byte	x	version %d,
+>>10	leshort	=1	1 pattern
+>>10	leshort	!1	%d patterns