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- On this page, INFOPLUS attemts to determine the CPU and math coprocessor
- that you have.
-
- The CPU is determined by exploiting minor differences between the CPU's.
- INFOPLUS can detect the 8088, 8086, V20, V30, 80188, 80186, 80286, i386,
- i486, and i486SX. Currently, INFOPLUS cannot distinguish between the
- i386SX and the i386DX. Also, the AMD clones (Am386DX and Am386SX) are
- indistinguishable from their Intel counterparts.
-
- **********The i386 POPAD bug**********
-
- If an i386 is detected, a test for a minor bug is done. Failure of this
- test is nothing to worry about. The majority of CPU's will fail.
-
- TECHNICAL NOTE: On many 386's, the EAX register can be lost after a
- POPAD (POP All Double, the complement of PUSHAD) is performed. The most
- common fix is to put a NOP immediately after the POPAD. This is a very
- well known bug, and programs that use 386 specific code should work around
- it.
-
- For a 286/386/486, INFOPLUS will inform you of some of the special
- registers and status bits of these CPUs.
-
- In Coprocessors, INFOPLUS can detect the 8087, 80287, and 80387. It also
- informs on whether the BIOS flat has been set. On PC/XT computers, this
- bit is determined by a DIP switch setting. On AT's and better, by a CMOS
- setting.
-
- For a 386/486, INFOPLUS checks to see if the BIOS has set a flag for the
- Weitek coprocessor. Not all BIOSs support this flag.
-
-