home *** CD-ROM | disk | FTP | other *** search
- 68LC040 Owners Must Read
- CGDCCGVM
- Times
- John Neil & Associates
- P.O. Box 2156
- Cupertino, CA 95015 USA
- Orders:
- E-Mail:
- (800) 663-2943
- (415) 661-2944
- johnneil@netcom.com
- lUUUU
- HUUUU
- I$UUUU
- ------
- <<<<<<
- KKKKKK
- ZZZZZZ
- iiiiii
- xxxxxx
- 68LC040 CPU Bug Information
- John Neil
- February 10, 1995
- 68LC040 CPU Chip Bug
- VThe 68LC040 CPU chip has a bug in it which prevents many FPU applications from working
- )_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
- ^work-around this bug. If you have SoftwareFPU installed on a 68LC040 Macintosh (currently the
- WCentris 610, LC 475, 575 & 630, Performa 475, 476, 575, 577, 578, 630, 635, 636, & 638,
- ZPowerBook 520, 540, PowerBook Duo 280, and Quadra 605 and 610), you will have to test each
- ZFPU 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 crash, test
- ^the same application on a regular 68040 Macintosh. If the application operates correctly on 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
- )YFPU. 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
- )#SoftwareFPU on PowerPC Macintoshes.
- temp.0001
- Microsoft Word
- John M. Neil
- John M. Neil
- Microsoft Word
- Times
- rPREC
- ~PRVS
- Pathfinder Mixe
- ARTFART5
- 68LC040 Owners Must Readt
- CGDCCGVM
- Pressure Supportu
- 8BXMART5
- H %+@B cJ
- ffffo
- ffffo
- ffffo
- 2icl8
- >icl4
- Jics#
- Vics8
- bics4
-