#------------------------------------------------------------------------------
-# $File: filesystems,v 1.78 2013/05/09 01:21:51 christos Exp $
+# $File: filesystems,v 1.79 2013/05/14 12:55:42 christos Exp $
# filesystems: file(1) magic for different filesystems
#
0 name partid
>>>>>495 string RENF \b, FAT (16 bit)
# x86 bootloader end
+# by Joerg Jenderek at Apr 2013
+# Print the DOS filenames from directory entry form with 8 right space padded bytes + 3 bytes for extension
+# like IO.SYS. MSDOS.SYS , KERNEL.SYS , DRBIO.SYS
+0 name DOS-filename
+# space=0x20 (00100000b) means empty
+>0 ubyte&0xDF >0
+>>0 ubyte x \b%c
+>>>1 ubyte&0xDF >0
+>>>>1 ubyte x \b%c
+>>>>>2 ubyte&0xDF >0
+>>>>>>2 ubyte x \b%c
+>>>>>>>3 ubyte&0xDF >0
+>>>>>>>>3 ubyte x \b%c
+>>>>>>>>>4 ubyte&0xDF >0
+>>>>>>>>>>4 ubyte x \b%c
+>>>>>>>>>>>5 ubyte&0xDF >0
+>>>>>>>>>>>>5 ubyte x \b%c
+>>>>>>>>>>>>>6 ubyte&0xDF >0
+>>>>>>>>>>>>>>6 ubyte x \b%c
+>>>>>>>>>>>>>>>7 ubyte&0xDF >0
+>>>>>>>>>>>>>>>>7 ubyte x \b%c
+# DOS filename extension
+>>8 ubyte&0xDF >0 \b.
+>>>8 ubyte x \b%c
+>>>>9 ubyte&0xDF >0
+>>>>>9 ubyte x \b%c
+>>>>>>10 ubyte&0xDF >0
+>>>>>>>10 ubyte x \b%c
+# Print 2 following DOS filenames from directory entry form
+# like IO.SYS+MSDOS.SYS or ibmbio.com+ibmdos.com
+0 name 2xDOS-filename
+# display 1 space
+>0 ubyte x \b
+>0 use DOS-filename
+>11 ubyte x \b+
+>11 use DOS-filename
+
# added by Joerg Jenderek at Feb 2013 according to http://thestarman.pcministry.com/asm/mbr/MSWIN41.htm#FSINFO
# and http://en.wikipedia.org/wiki/File_Allocation_Table#FS_Information_Sector
>0 string RRaA
############################################################################
# Minix-ST kernel floppy
0x800 belong 0x46fc2700 Atari-ST Minix kernel image
->19 string \240\5\371\5\0\011\0\2\0 \b, 720k floppy
->19 string \320\2\370\5\0\011\0\1\0 \b, 360k floppy
+# http://en.wikipedia.org/wiki/BIOS_parameter_block
+# floppies with valid BPB and any instruction at beginning
+>19 string \240\005\371\005\0\011\0\2\0 \b, 720k floppy
+>19 string \320\002\370\005\0\011\0\1\0 \b, 360k floppy
############################################################################
# Hmmm, is this a better way of detecting _standard_ floppy images ?
-19 string \320\2\360\3\0\011\0\1\0 DOS floppy 360k
+19 string \320\002\360\003\0\011\0\1\0 DOS floppy 360k
>0x1FE leshort 0xAA55 \b, x86 hard disk boot sector
-19 string \240\5\371\3\0\011\0\2\0 DOS floppy 720k
+19 string \240\005\371\003\0\011\0\2\0 DOS floppy 720k
>0x1FE leshort 0xAA55 \b, x86 hard disk boot sector
19 string \100\013\360\011\0\022\0\2\0 DOS floppy 1440k
>0x1FE leshort 0xAA55 \b, x86 hard disk boot sector
-19 string \240\5\371\5\0\011\0\2\0 DOS floppy 720k, IBM
+19 string \240\005\371\005\0\011\0\2\0 DOS floppy 720k, IBM
>0x1FE leshort 0xAA55 \b, x86 hard disk boot sector
-19 string \100\013\371\5\0\011\0\2\0 DOS floppy 1440k, mkdosfs
+19 string \100\013\371\005\0\011\0\2\0 DOS floppy 1440k, mkdosfs
>0x1FE leshort 0xAA55 \b, x86 hard disk boot sector
-19 string \320\2\370\5\0\011\0\1\0 Atari-ST floppy 360k
-19 string \240\5\371\5\0\011\0\2\0 Atari-ST floppy 720k
+19 string \320\002\370\005\0\011\0\1\0 Atari-ST floppy 360k
+19 string \240\005\371\005\0\011\0\2\0 Atari-ST floppy 720k
+# | | | | |
+# | | | | heads
+# | | | sectors/track
+# | | sectors/FAT
+# | media descriptor
+# BPB: sectors
# Valid media descriptor bytes for MS-DOS:
#
# 11111000 Hard disk any format
#
+# all FAT12 (strength=70) floppies with sectorsize 512 added by Joerg Jenderek at Jun 2013
+# http://en.wikipedia.org/wiki/File_Allocation_Table#Exceptions
+512 ubelong&0xE0ffff00 0xE0ffff00
+# without valid Media descriptor in place of BPB, cases with are done at other places
+>21 ubyte <0xE5 floppy with old FAT filesystem
+# but valid Media descriptor at begin of FAT
+#>>512 ubyte =0xed 720k
+#>>512 ubyte =0xf0 1440k
+#>>512 ubyte =0xf8 720k
+#>>512 ubyte =0xf9 1220k
+#>>512 ubyte =0xfa 320k
+#>>512 ubyte =0xfb 640k
+>>512 ubyte =0xfc 180k
+# look like an an old DOS directory entry
+>>>0xA0E ubequad 0
+>>>>0xA00 ubequad !0
+!:mime application/x-ima
+>>512 ubyte =0xfd
+# look for 2nd FAT at different location to distinguish between 360k and 500k
+>>>0x600 ubelong&0xE0ffff00 0xE0ffff00 360k
+#>>>0x500 ubelong&0xE0ffff00 0xE0ffff00 500k
+>>>0xA0E ubequad 0
+!:mime application/x-ima
+>>512 ubyte =0xfe
+>>>0x400 ubelong&0xE0ffff00 0xE0ffff00 160k
+>>>>0x60E ubequad 0
+>>>>>0x600 ubequad !0
+!:mime application/x-ima
+#>>>0xC00 ubelong&0xE0ffff00 0xE0ffff00 1200k
+>>512 ubyte =0xff 320k
+>>>0x60E ubequad 0
+>>>>0x600 ubequad !0
+!:mime application/x-ima
+>>512 ubyte x \b, Media descriptor 0x%x
+# without x86 jump instruction
+>>0 ulelong&0x804000E9 !0x000000E9
+# assembler instructions: CLI;MOV SP,1E7;MOV AX;07c0;MOV
+>>>0 ubequad 0xfabce701b8c0078e \b, MS-DOS 1.12 bootloader
+# IOSYS.COM+MSDOS.COM
+>>>>0xc4 use 2xDOS-filename
+>>0 ulelong&0x804000E9 =0x000000E9
+# only x86 short jump instruction found
+>>>0 ubyte =0xEB
+>>>>1 ubyte x \b, code offset 0x%x+2
+# http://thestarman.pcministry.com/DOS/ibm100/Boot.htm
+# assembler instructions: CLI;MOV AX,CS;MOV DS,AX;MOV DX,0
+>>>>(1.b+2) ubequad 0xfa8cc88ed8ba0000 \b, PC-DOS 1.0 bootloader
+# ibmbio.com+ibmdos.com
+>>>>>0x176 use DOS-filename
+>>>>>0x181 ubyte x \b+
+>>>>>0x182 use DOS-filename
+# http://thestarman.pcministry.com/DOS/ibm110/Boot.htm
+# assembler instructions: CLI;MOV AX,CS;MOV DS,AX;XOR DX,DX;MOV
+>>>>(1.b+2) ubequad 0xfa8cc88ed833d28e \b, PC-DOS 1.1 bootloader
+# ibmbio.com+ibmdos.com
+>>>>>0x18b use DOS-filename
+>>>>>0x196 ubyte x \b+
+>>>>>0x197 use DOS-filename
+# http://en.wikipedia.org/wiki/Zenith_Data_Systems
+# assembler instructions: MOV BX,07c0;MOV SS,BX;MOV SP,01c6
+>>>>(1.b+2) ubequad 0xbbc0078ed3bcc601 \b, Zenith Data Systems MS-DOS 1.25 bootloader
+# IO.SYS+MSDOS.SYS
+>>>>>0x20 use 2xDOS-filename
+# http://en.wikipedia.org/wiki/Corona_Data_Systems
+# assembler instructions: MOV AX,CS;MOV DS,AX;CLI;MOV SS,AX;
+>>>>(1.b+2) ubequad 0x8cc88ed8fa8ed0bc \b, MS-DOS 1.25 bootloader
+# IO.SYS+MSDOS.SYS
+>>>>>0x69 use 2xDOS-filename
+# assembler instructions: CLI;PUSH CS;POP SS;MOV SP,7c00;
+>>>>(1.b+2) ubequad 0xfa0e17bc007cb860 \b, MS-DOS 2.11 bootloader
+# defect IO.SYS+MSDOS.SYS ?
+#>>>>>0x162 use 2xDOS-filename
+
# CDROM Filesystems
# Modified for UDF by gerardo.cacciari@gmail.com
32769 string CD001 #
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