MIB - Macs In Beige ant Small Dog!
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Modify Apple's CD/DVD drivers to mount third party drives.

Several readers emailed to point out an excellenct article in c't Magazine that showed how to use ResEdit on Apple CD/DVD drivers to make them recognize any CD ROM drives - not just Apple's.

One drawback was the fact you had to keep two copies of the CD extension active: the original for Apple's drives, and a modified version for non-Apple drives.

Thanks to Anthony Saxton, the author of ClipDragon and President of the Las Vegas Macintosh Users Group (VMUG), it's now posible to have a single modified driver work with both Apple CD drives, and any other SCSI CD ROM drive.

The screeshots below are for the Apple CD/DVD Driver 1.0.1. with additional descriptions for Apple CD-ROM 5.4.2, Apple CD/DVD Driver 1.2, Apple CD/DVD Driver 1.2 .1


Open a copy of the CD Driver in ResEdit and find the DRVR resources.

Open them with a double-click.



Open ID# 32 with a double-click.

If you get an error about the resource size, open it using the menu item "Open using Hex Editor"


The screenshot above for the Apple CD/DVD Driver 1.0.1 is representative of the changes to be made in all the drivers. Find the original value at the appropriate row and offset, and change it to the new value.

Below is a table for first change in the various AppleCD drivers.

Version Row Offset
Original Value
New Value
5.4.2 06B0
06B6
6704
4E71
1.0.1 06C8
06C8
6704
4E71
1.2 06C0
06C6
6706
4E71
1.2.1 06D8
06D8
6706
4E71


Before
After

The graphic above, and the table below show the second change to be made to the driver.

Version Row Offset
Original Value
New Value
5.4.2 09C0
09C6
6606 4A84 6700 0086
4E71 4E71 4E71 4E71
1.0.1 0A10
0A10
6606 4A84 6700 0086
4E71 4E71 4E71 4E71
1.2 0AD0
0AD6
6604 4A84 6706
4E71 4E71 4E71
1.2.1 0AE8
0AE8
6604 4A84 6706
4E71 4E71 4E71

When you're finished, replace the original driver with the new one and restart your computer. Your Apple supplied CD ROM driver will now mount most SCSI CD ROM Drives!

Unfortunately, the edit doesn't work with every combination of CD drive and computer, but of the thousands that have performed the edit, I have received only a few emails of failure.

One reader wrote to say renaming the "Toast CD Reader" by adding a SPACE as the first character in the name - forcing it to load first, allows CD burners to work with the new driver.

Your milage may vary. :)


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