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- EM87 V1.3 2/10/89
- =========
-
- This program fully emulates the 8087 math coprocessor on 80286
- and 80386 based computers. This is useful to run software that requires
- the 8087/80287/80287. This program does not emulate the 80287/80387
- extensions to the 8087 instruction set, but all software I have seen
- only uses the 8087 instructions to be PC/XT compatable. Please note that
- floating point emulation is MUCH slower than the real thing (but also
- much cheaper!).
- Unfortunately, this method of emulation does not work on the 8088
- and 8086 based computers because these processors do not have emulation
- support built in.
-
- History:
- Version 1.1 fixes problems with programs that access extended memory,
- like VDISK.SYS, RAMDRIVE.SYS, SMARTDRV.SYS, AUTOCAD, etc. Also this version
- will not load if a real 80X87 is present.
- Version 1.2 fixes problems uninstalling EM87 under certain versions of
- DOS. Also display of the help screen would lock up some machines.
- Version 1.3 allows floating point exception interrupts to properly
- cause a non-maskable interrupt when enabled. Very few programs use this feature.
- The lack of this capability caused programs that needed it to do strange things
- to the video display.
-
- Tested with:
- AUTOCAD release 9.
- AUTOCAD release 10.
- Microway's 87TEST v1.20 (A very intensive 8087 test program).
- FATMAN30 (A great mandelbrot generator!).
- NORTON UTILITIES 4.5 SI (Reports a 8087 present).
- PC-Matlab
- Simnon
-
- Usage:
- EM87 >Display the help screen.
- EM87 /L >Load the emulator.
- EM87 /U >Unload the emulator.
-
- Distribution:
- This program may be freely distributed by anyone in its unmodified form
- only and must be with this unmodified documentation file.
-
- Shareware:
- EM87 is copyright 1989, 1990 Ron Kimball, all rights reserved. It is
- not "Public Domain" or "Freeware". If you intend to use this program after
- evaluation you must send me five dollars for registration. Registration
- entitles you to use EM87 on a single machine at any one time, and the right to
- use (under the same terms) any future version of EM87 that may be released for
- no further charge. Include the version number of EM87 that you are presently
- using. Also please tell me of any new uses you may find for this program.
- This registration may be transferred to another by merely notifying me
- at the address below.
- I will notify you of updates, which you may download from various
- BBS's or obtain directly from me for a small charge. Thanks.
-
- Ron Kimball
- RR01 Box 15Y
- Brookfield, Ma 01506
-