lotus

previous page: 10.014 How can I convert a .po image to/from a .dsk or .do image?
  
page up: Apple II Csa2 FAQs
  
next page: 10.016 How do I tell what kind of file this is?

10.015 What do the different popular file name extensions, like ".BSC", mean; and, how do I access the files?




Description

This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.

10.015 What do the different popular file name extensions, like ".BSC", mean; and, how do I access the files?

         File name extensions tell you what sort of file you are dealing with so
that you will know which program(s) to use to unpack, unShrink, display, etc.
the file. Many programs which create such files do not automatically add an
extension-- for example, most of the disk images on the Golden Orchard CD are
Diskcopy files with no name extension. Many other programs which create files
suggest a default extension as part of the name-- GS-ShrinkIt generally
suggests ".SHK"-- but, the user can change this and

save under any legal name desired. (One popular change is using ".SDK" for
ShrinkIt whole-disk archive files.)

     Some extensions indicate a filetype recognized by Apple II ProDOS; but,
often, the extension is just for user information or to help some utility
recognize the file as one it can deal with. For such files the actual ProDOS
filetype is usually TXT, BIN, or SHK.

        What is it?  (What program do I use?)
        ------------------------------------------------------------
 .2MG   also .2IMG- XGS IIgs disk image file usually 800k or
        larger (GS ASIMOV2; PC Imgutnew.exe)
 .AAF   Apple Archive Format [TEXT] for source code (aaf.unpacker)
 .ACU   NuFX Applelink archive (ShrinkIt)
 .ALU   usually a multi-file, non-compressed A2 archive (ALU)
 .APF   GS super-res "Apple Preferred" packed graphics format
        (Platinum Paint, Convert 3200, etc.)
 .ARC   PC Archive (GS-ShrinkIt or DeArc2E or PC Arc program)
 .BMP   Windows Bit-Mapped graphics format (GS Convert 3200;
        many PC viewers)
 .BNX   NuFX with BLU header. (ShrinkIt)
 .BNY   BLU archive. (ShrinkIt)
 .BQY   NuFX with BLU header. (ShrinkIt)
 .BSC   BinScii file. [TEXT]  (BinScii or GScii)
 .BSE   A GSHK .SEA file with a Binary II header (ShrinkIt)
 .BSQ   BinScii'd NuFX file. [TEXT]  (BinScii plus ShrinkIt on
        the result)
 .BXY   NuFX archive with a Binary II header. (ShrinkIt)
 .CPT   Compactor Pro archive (Compactor Pro on a Mac only)
 .DIMG  Diskcopy disk image file usually produced by a
        Mac (GS Clone or Diskcopy; Mac Diskcopy; PC Imgutnew.exe)
 .DO    a .DSK file specified as having data in "DOS 3.3 Order"
        i.e. uses DOS 3.3 sector ordering (A2 DSK2FILE and GS ASIMOV)
 .DSK   standard emulator disk image-- length is 143360 bytes for
        5.25" disk images (A2 DSK2FILE and GS ASIMOV)
 .EXE   A2 Executioner file [TEXT]. (On A2; some files may EXEC
        properly under only DOS 3.3.)
 .GIF   Graphics Interchange Format: Compressed picture (IIGIF for
        //e; Super Convert, ... on GS; PC, etc.: many viewers
        and editors)
 .GZ    GZip PC archive format often used for storing A2 emulator
        disk images (GS GZPK v2 plus PMPUnZIP or Angel; PC WinZIP)
 .HDV   Raw (DSK) ProDOS ordered disk image file 800K or greater in
        size; used by emus as a virtual hard disk (ASIMOV2 on IIgs)
 .HQX   Mac BinHex file. [TEXT] (BinHex on Mac or GScii)
 .HTM   HTML [TEXT] with embedded Text commands (Web
        browsers, web editors, etc.)
 .IMAGE Diskcopy images (see .DIMG)
 .IMG   Type IMG or "user #7" Copy II Plus disk image file (A2
        Copy II Plus v6.x or v7.x)
        .IMG is sometimes used for Diskcopy images (see .DIMG)
 .JPG   PC JPEG hi-res, hi-color graphics format (GS JPEG.VIEWER,
        etc. B/W only or PC, Unix viewers)
 .LBR   a multi-file, non-compressed A2 archive (Librarian)
 .LHA   LHA Archive (PC/Amiga LZH program)
 .LZH   LZH Archive (PC/Amiga LZH program)
 .NIB   emulator disk image (typical length: 232960) for protected
        5.25" software (A2 Saltine's Super Transcopy)
 .PCX   PC graphics format (GS Convert 3200; PC many viewers)
 .PD    compressed GS multi-palette graphics file w/o
        palettes (GS SuperPac)
 .PNG   PC PING hi-res, hi-color graphics format (PC viewer)
 .PO    a .DSK file specified as having data in "ProDOS Order"
        i.e. uses ProDOS sector ordering (A2 DSK2FILE and GS ASIMOV)
 .PS    compressed GS multi-palette graphics file with
        palettes (GS SuperPac)
 .QQ    BLU archive.  (ShrinkIt)
 .SDK   ShrinkIt disk image, usually NuFX-compressed (ShrinkIt)
 .SEA   Self-extracting A2 ShrinkIt or Mac ShrinkIt archive
        (depending upon kind, run on Apple IIgs or Mac)
 .SHK   usually an A2 NuFX-compressed archive; non-A2-compatible
        Mac .SHK archives also exist (GS ShrinkIt* / Mac unshrinker
        utility / PC Nulib-- does not extract GS resource forks)
 .SIT   Mac StuffIt archive. (Stuffit on Mac or GS ShrinkIt)
        GS-ShrinkIt will not decode StuffIt Deluxe files.
 .TAR   Unix Tape Archive (Unix tar with -xvf option, GS EXE tar)
 .TGZ   Gzipped .TAR file
 .uu    Unix uuencode file [TEXT] (//e uudecode, Unix uudecode)
 .uue   Unix uuencode file [TEXT] (//e uudecode, Unix uudecode)
 .TIFF  Graphics format (GS SHR Convert)
 .TXT   [TEXT] An ASCII text file (Text editors,
        word processors, etc.)
 .UU    Unix uuencode file [TEXT] (A2 uudecode or Unix uudecode)
 .UUE   Unix uuencode file [TEXT] (A2 uudecode or Unix uudecode)
 .Z     Compressed file (GS-ShrinkIt or Unix uncompress)
 .ZIP   PC Zip Archive (GS PMPUnZIP or UNZIP [GS Shell EXE]
        or PC WinZIP, PKUNZIP, Unix unzip)
 .ZOO   PC Zoo Archive (GS-ShrinkIt??? or PC ZOO program)

* Note: GS-ShrinkIt (= GSHK) can handle all ShrinkIt files except
        .SDK (shrunken disk) files of 5.25" DOS 3.3 disks created by
        8-bit ShrinkIt. 8-bit ShrinkIt does not work for GS
        files having a resource fork or GS .SEA files.

----------------------------

By:  Apple's ftp site ...

Most files are in one of a few common formats, and many are a combination.

 .sit    StuffIt 1.5.1 archives
 .hqx    BinHex 4.0 file
 .bin    Binary file
 .image  Diskcopy 4.2 image file
 .txt    plain ASCII text file
 .bsc    Apple II BinSCII file
 .shk    Apple II ShrinkIt file

     Most of the Macintosh files are BinHexed StuffIt files.  This means you
need to transfer the file, then read the license agreement which is prepended
to it (with any text processor), use BinHex or any utility which can read
BinHex 4.0 files to decode the BinHex to a StuffIt archive, then use UnStuffIt
or the StuffIt Expander (or a similar utility) to decompress the .sit file into
the final file.

     In some cases the final file is a .image file. These are exact duplicates
of floppy disks (with verified checksums). Use Diskcopy to convert these files
into floppy disks for installation. Some Apple System Software is in this
format.

     Most of the Apple II files are either straight text or BinSCII'd ShrinkIt
files. This means you need to transfer the file, then use BinSCII to convert
the .bsc file to a ShrinkIt file, then use ShrinkIt to create the final file or
disk.

Note: Apple calls their BinSCII'd .SHK files ".bsc" instead of ".bsq". It is
fairly common for uploaders and ftp sites to tag any BinSCII'd file as ".bsc".
The rationale is that, once a user un-BinSCII's a file, he or she will find an
.SHK, .ZIP, etc. file and know how to continue.

By:  David Kopper
    

 

Continue to:













TOP
previous page: 10.014 How can I convert a .po image to/from a .dsk or .do image?
  
page up: Apple II Csa2 FAQs
  
next page: 10.016 How do I tell what kind of file this is?