Here's the how-to, quoted from c't 26/98 >www.heise.de/ct/english/98/26/188<:
Applying the patch with ResEdit Applying the patch with ResEdit should be easy. Afterwards the Apple CD-ROM 5.4.2, as well as Apple CD/DVD Driver 1.01 and 1.2, can be used with any SCSI drive. The respective system extension contains two resources of type "DRVR", one with ID = 32 which handles SCSI drives while the other with ID = 33 handles their ATAPI cousins. Which drives are supported is hard-wired inside the driver. Nevertheless, only three bytes have to be changed to transform the stubborn driver software into an "I-accept-any-SCSI-drive" version. Using ResEdits "Open Using Hex Editor" command, open the DRVR-resourve ID=32 and change three bytes according to the following table. Please make sure that the length of the resource does not change. As with anything you do in ResEdit, it is mandatory to work only with copies, never the original file. Apple CD-ROM 5.4.2 CD/DVD Driver 1.01 CD/DVD Driver 1.2 Change from $67 to $66 at offset $09CA $06B6 $0A1A $06C8 $0ADA $06C6 Change from $66 to $67 at offset $09C6 $0A16 $0AD6 The Apple DVD-ROM driver 1.0 from MacOS 8.1 accepts only ATAPI DVD drives, so an adaption to SCSI devices is simply impossible. The CD/DVD drivers 1.01 and 1.2, on the other hand, will accept SCSI CD drives as well as SCSI DVD drives after applying the patch. You can even read CD-ROMs with the patched driver using DVD-RAM drives and CD-Writers. For writing to these media you will still need specialized software like the DVD-RAM-Tuneup from Software Architects or Adaptec's Toast. The modified software has its caveats. Like the Apple CD-ROM driver 5.3.1 it has problems skipping tracks on Audio CDs on certain drives and it ignores the Apple drives it once accepted. If you want to use an Apple-supplied CD-ROM drive as well as other models simultaneously, you simply have to put an original and the modified driver into the Extensions folder. The unpatched version takes care of the Apple drive whereas the universal driver handles all the drives the Apple software rejects. (adb) There is by the way a similar problem with SCSI hard disks and a similar solution - patching Apple's Hard Drive Setup. Edgar > Von: [EMAIL PROTECTED] > Antworten an: <[EMAIL PROTECTED]> (Duo/2400 List) > Datum: Thu, 13 Jun 2002 08:26:15 -0600 (MDT) > An: <[EMAIL PROTECTED]> (Duo/2400 List) > Betreff: [Duo2400] Using "generic" SCSI devices > > One last little loose end to tie up, if you don't mind (I guess no one > will reply, if you do): Did Apple simply add a few lines in the driver > to check that the CD-ROM drive (or other device) was made by Apple (or > some other preferred manufacturer), and then not mount it if it was not? > I *know* that the SCSI controller recognizes these devices properly, > and "reports" their manufacturer and model number, so I would guess that > it wouldn't be very hard to do. (The fact that there is a driver hack > to get around this also suggests that this is what they did.) But, does > anyone know? ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
