========================================= = ShapeShifter Patch for Optical Drives = ========================================= This document is copyright © 1999, 2001 by Mark Knibbs . It is freely distributable for non-commercial purposes. ********************************************************************* * YOU ONLY NEED TO USE THIS PATCH IF YOU HAVE AN OPTICAL DISK DRIVE * * AND WISH TO BOOT SHAPESHIFTER FROM A MAC-FORMATTED OPTICAL DISK. * ********************************************************************* Introduction ------------ There are several types of SCSI device. For example, hard disks are type 0 (direct access), CD-ROM drives are type 5, and some optical drives are type 7 (optical memory). Ever since version 3.4, the ShapeShifter Macintosh emulator can only boot from direct access (type 0) SCSI devices. That is, from e.g. hard disks. Here is an extract from the version history: V3.4 04.Mar.96 - ShapeShifter won't try to boot from SCSI devices other than direct access devices Some optical drives are type 7 (optical memory), and some DVD-RAM and PD drives report themselves as type 5 (CD-ROM). ShapeShifter refuses to boot from a Mac-formatted optical disk unless your optical drive is type 0. This is annoying. Similarly to the HDToolBox patch that is in the Amiga Magneto-Optical Drive FAQ (on Aminet as docs/help/Amiga_MO_FAQ.lha), I have figured out patches for ShapeShifter versions 3.10 and 3.11 to not check the device type when booting. There are several other deficiencies in ShapeShifter's device handling, but this patch does not address those. How to Apply the Patch ---------------------- You can use a binary file editor like Hex (on Aminet as disk/moni/HexED.lha) to make the following change ShapeShifter executable: Version 3.10 Offset From To ------ ---- -- 17024 = $4280 41EB 603E Version 3.11 Offset From To ------ ---- -- 17044 = $4294 41EB 603E Alternatively, you can use GPatch (on Aminet as util/misc/gpatch.lha) to apply the tiny patch file which is supplied along with this file. From a CLI/ Shell window, CD to the directory where your ShapeShifter executable is, and use commands like: Rename ShapeShifter ShapeShifter.orig GPatch ShapeShifter.orig SSOpticalPatch.gpch ShapeShifter See also -------- My Amiga Magneto-Optical Drive FAQ, on Aminet as docs/help/Amiga_MO_FAQ.lha, also available in HTML format on my web page at http://vistweb.com/mark History of this Document ------------------------ 31-Jan-2001 Updated for ShapeShifter version 3.11 and expanded introduction 29-May-1999 Updated and uploaded to Aminet 19-Apr-1999 Posted to the amiga-mo mailing list Regards, -- Mark mark_k@iname.com