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- 68LC040 Owners Must Read
- CGDCCGVM
- Times
- John Neil & Associates
- P.O. Box 2156
- Cupertino, CA 95015 USA
- Orders:
- E-Mail:
- Web Site:
- (800) 663-2943
- (415) 661-2944
- sales@jna.com
- http://www.jna.com
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- 68LC040 CPU Bug Information
- John Neil
- April 23, 1996
- 68LC040 CPU Chip Bug
- VThe 68LC040 CPU chip has a bug in it which prevents many FPU applications from working
- H_properly with SoftwareFPU. The bug is confirmed by Motorola and listed as bug E4 on revision 4
- `of the official Motorola 68LC040 errata sheet. Unfortunately there is no way for SoftwareFPU to
- Ywork-around this bug. If you have SoftwareFPU installed on a 68LC040 Macintosh, you will
- `have to test each FPU application you use to see whether it will work on your Macintosh. If the
- `application crashes, it is probably due to the 68LC040 CPU chip bug. To verify the cause of the
- ecrash, test the same application on a regular 68040 Macintosh. If the application operates correctly
- Uon a 68040 Macintosh, the CPU bug is causing the application to crash on your 68LC040
- `Macintosh. If the application crashes on a 68040 Macintosh, the CPU bug is not the cause of the
- 68LC040 crash.
- UIf your FPU application crashes with SoftwareFPU because of the 68LC040 CPU bug, your
- options are:
- Replace the application with a version that does not require an FPU, if available.
- Replace the 68LC040 CPU in your Macintosh with a 68040 CPU that contains a hardware
- HYFPU. John Neil & Associates sells 68040 upgrades for desktop Macintoshes and PowerBooks.
- WSee the price list at the end of the "About SoftwareFPU" document for more information.
- Install a PowerPC upgrade card in your computer. FPU applications work properly with
- H#SoftwareFPU on PowerPC Macintoshes.
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- 68LC040 Owners Must Readt
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