TOPIC
I have a PC Compatibility Card in my Power Macintosh. After installing Windows 95, I got a message that the computer is not running at optimal performance. It then stated that the hard drive, floppy drive, and CD-ROM drive are running in "Compatibility Mode". What is compatibility mode, and is this normal?
DISCUSSION Windows 95 has the ability to use a 32-bit protected-mode driver to access the hard drive controller and other drive controllers. On some equipment, including the PC Compatibility Card, Windows 95 is unable to access the drive controllers in this mode, so Windows 95 must use 16-bit real-mode drivers. This is the Compatibility Mode that Windows 95 mentioned. Using the 16-bit real-mode is normal for the PC Compatibility Cards. Windows 95 has the ability to use either 32-bit or 16-bit drivers, so this should not cause any problems. Note that some new Windows 95-only software may require 32-bit protected-mode drivers. Such software will not work with the PC Compatibility cards. Before troubleshooting any software issues in depth, check with the software vendor to verify whether 32-bit protected-mode drivers are required or not. Apple will not be providing 32-bit protected-mode drivers for the PC or DOS Compatibility cards. |
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| Document Information | |
| Product Area: | Computers |
| Category: | DOS Compatible |
| Sub Category: | PC Compatibility Cards |
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