============================================== = ShapeShifter 3.10 Patch for Optical Drives = ============================================== This document is copyright © 1999 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 ------------ 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 disk drives are of type 7 (optical memory). So you cannot boot ShapeShifter from a Mac-formatted optical disk if your optical drive is set to "optical memory device" mode (type 7). 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 a patch for ShapeShifter 3.10 to not check the device type when booting. 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 to the ShapeShifter 3.10 executable: Offset From To ------ ---- -- 17024 = $4280 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 ------------------------ 29-May-99 Updated and uploaded to Aminet 19-Apr-99 Posted to the amiga-mo mailing list Regards, -- Mark mark_k@iname.com