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+
+#------------------------------------------------------------------------------
+# $File: xenix,v 1.15 2022/10/19 20:15:16 christos Exp $
+# xenix: file(1) magic for Microsoft Xenix
+#
+# "Middle model" stuff, and "Xenix 8086 relocatable or 80286 small
+# model" lifted from "magic.xenix", with comment "derived empirically;
+# treat as folklore until proven"
+#
+# "small model", "large model", "huge model" stuff lifted from XXX
+#
+# XXX - "x.out" collides with PDP-11 archives
+#
+0 string core core file (Xenix)
+# URL: http://www.polarhome.com/service/man/?qf=86rel&tf=2&of=Xenix
+# http://fileformats.archiveteam.org/wiki/OMF
+# Reference: http://www.azillionmonkeys.com/qed/Omfg.pdf
+# Update: Joerg Jenderek
+# recordtype~TranslatorHEADerRecord
+0 byte 0x80
+# GRR: line above is too general as it catches also Extensible storage engine DataBase,
+# all lif files like forth.lif hpcc88.lif lex90b.lif ( See ./lif)
+# and all compressed DEGAS low-res bitmaps like: MUNCHIE.PC1 PIDER1.PC1
+# skip examples like GENA.SND Switch.Snd by looking for record length maximal 1024-3
+>1 uleshort <1022
+# skip examples like GAME.PICTURE Strange.Pic by looking for positive record length
+>>1 uleshort >0
+# skip examples like Xtable.Data FRACTAL.GEN SHR.VIEW by looking for positive string length
+>>>3 ubyte >0
+# skip examples like OMBRE.6 with "UUUUUU" name by looking for valid high second record type
+>>>>(1.s+3) ubyte >0x6D
+# skip few Atari DEGAS bitmap TPDEMO.PC2 RECIPE.PC2 with invalid "high" second record type FEh FFh
+>>>>>(1.s+3) ubyte <0xF2 8086 relocatable (Microsoft)
+#!:mime application/octet-stream
+!:mime application/x-object
+!:ext obj/o/a
+# T-module name often source name like "hello.c" or "jmppm32.asm" in JMPPM32.OBJ or
+# "kbhit" in KBHITS.OBJ or "CAUSEWAY_KERNAL" in CWAPI.OBJ
+>>>>>>3 pstring x \b, "%s"
+# data length probably lower 256 according to TrID obj_omf.trid.xml
+>>>>>>1 uleshort x \b, 1st record data length %u
+# checksum
+#>>>>>>(3.b+4) ubyte x \b, checksum %#2.2x
+# second recordtype: 96h~LNAMES 88h~COMENT 8CH~EXTDEF
+# highest F1h~Library End Record
+>>>>>>(1.s+3) ubyte x \b, 2nd record type %#x
+>>>>>>(1.s+4) uleshort x \b, 2nd record data length %u
+0 leshort 0xff65 x.out
+>2 string __.SYMDEF randomized
+>0 byte x archive
+0 leshort 0x206 Microsoft a.out
+>8 leshort 1 Middle model
+>0x1e leshort &0x10 overlay
+>0x1e leshort &0x2 separate
+>0x1e leshort &0x4 pure
+>0x1e leshort &0x800 segmented
+>0x1e leshort &0x400 standalone
+>0x1e leshort &0x8 fixed-stack
+>0x1c byte &0x80 byte-swapped
+>0x1c byte &0x40 word-swapped
+>0x10 lelong >0 not-stripped
+>0x1e leshort ^0xc000 pre-SysV
+>0x1e leshort &0x4000 V2.3
+>0x1e leshort &0x8000 V3.0
+>0x1c byte &0x4 86
+>0x1c byte &0xb 186
+>0x1c byte &0x9 286
+>0x1c byte &0xa 386
+>0x1f byte <0x040 small model
+>0x1f byte =0x048 large model
+>0x1f byte =0x049 huge model
+>0x1e leshort &0x1 executable
+>0x1e leshort ^0x1 object file
+>0x1e leshort &0x40 Large Text
+>0x1e leshort &0x20 Large Data
+>0x1e leshort &0x120 Huge Objects Enabled
+>0x10 lelong >0 not stripped
+
+0 leshort 0x140 old Microsoft 8086 x.out
+>0x3 byte &0x4 separate
+>0x3 byte &0x2 pure
+>0 byte &0x1 executable
+>0 byte ^0x1 relocatable
+>0x14 lelong >0 not stripped
+
+0 lelong 0x206 b.out
+>0x1e leshort &0x10 overlay
+>0x1e leshort &0x2 separate
+>0x1e leshort &0x4 pure
+>0x1e leshort &0x800 segmented
+>0x1e leshort &0x400 standalone
+>0x1e leshort &0x1 executable
+>0x1e leshort ^0x1 object file
+>0x1e leshort &0x4000 V2.3
+>0x1e leshort &0x8000 V3.0
+>0x1c byte &0x4 86
+>0x1c byte &0xb 186
+>0x1c byte &0x9 286
+>0x1c byte &0x29 286
+>0x1c byte &0xa 386
+>0x1e leshort &0x4 Large Text
+>0x1e leshort &0x2 Large Data
+>0x1e leshort &0x102 Huge Objects Enabled
+
+0 leshort 0x580 XENIX 8086 relocatable or 80286 small model
+# GRR: line above is too general as it catches also all 8086 relocatable (Microsoft) with 1st record data length 5 C0M.OBJ C0T.OBJ C0S.OBJ